JP3640792B2 - Waste treatment method and apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waste treatment method and apparatus for performing pretreatment for subjecting organic waste to methane fermentation.
[0002]
[Prior art]
When organic waste such as raw garbage, manure, sewage sludge, and septic tank sludge is subjected to methane fermentation, impurities are removed beforehand using a screen, etc., but the remaining impurities that cannot be removed are the core. Thus, scum is generated during methane fermentation or during tempering for methane fermentation, and inhibits methane fermentation and tempering.
[0003]
Therefore, conventionally, in order to suppress the occurrence of scum, for example, garbage that has entered a vinyl bag or the like breaks the vinyl bag with a bag breaker and removes the vinyl bag broken with the bag remover. After this, the garbage is crushed with a cutter or a hammer mill, etc., and it is not possible to remove it by removing the bag with a drum screen or trommel. Separate heavy garbage. Then, organic waste such as raw garbage from which impurities have been removed is appropriately tempered by adding water in a tempering tank, further cutting and tempering by stirring and mixing, and subjecting this tempered waste to methane fermentation treatment. ing.
[0004]
[Problems to be solved by the invention]
However, it has a complicated structure that removes foreign matter after smashing and removing the bag and crushing it, and the equipment becomes large, and the removal of foreign matter is not enough due to the properties of raw garbage to be processed, resulting in scum. To do. In addition, the bag opener and the bag remover have a complicated structure, and it is difficult to shut off from the outside in order to prevent the generation of a strange odor, and there is a problem that the configuration for blocking is further enlarged.
[0005]
In view of the above problems, an object of the present invention is to provide a waste treatment method and apparatus for improving the removal rate of contaminants without increasing the complexity and size of the apparatus.
[0006]
[Means for Solving the Problems]
The waste treatment method according to claim 1 is a waste treatment method in which organic waste mixed with impurities is stirred and mixed to perform tempering for methane fermentation treatment, and the waste is stirred and mixed. The waste is crushed before tempering, and after the crushed and tempered, the waste is solid-liquid separated into the impurities and a separation liquid for methane fermentation treatment. The tempering is performed together with the crushed waste from the washing drainage obtained by washing the solid-liquid separated impurities. Is.
[0007]
Then, after crushing organic waste together with impurities, stirring and mixing and tempering, solid-liquid separation into impurities and separation liquid for methane fermentation treatment, acid fermentation that occurs during tempering It is easy to separate impurities and waste by physical action such as cutting with stirring, and solid-liquid separation after tempering becomes easy, the structure is simplified, and organic substances discharged together with impurities are reduced. The removal rate of objects is improved.
[0008]
Also, Cleaning the solid-liquid separated contaminants and tempering the washed waste liquid containing the organic matter adhering to the contaminants together with the crushed waste, so there is a bad odor when processing the contaminants adhering to the organic matter It is difficult to occur, and it becomes easy to treat impurities, and the organic matter discharged with the impurities is reduced to improve the treatment efficiency of the organic matter. Furthermore, the water added during the tempering is supplemented by the washing waste liquid, so that it is not necessary to use water separately, and the waste processing efficiency is improved.
[0009]
Claim 2 The waste disposal method described in claim 1 In the waste disposal method described above, the crushing is performed using a biaxial crusher having two axes in which crushing blades overlap each other in the axial direction.
[0010]
And because the waste is crushed using a twin-screw crusher with two axes whose crushing blades overlap each other in the axial direction, the waste can be crushed with impurities with a simple structure, and vinyl and plastics etc. Since the light-weight impurities are crushed into a string shape, it is easy to separate and remove these vinyl materials and plastics.
[0011]
Claim 3 The waste disposal method described in claim 2 In the described waste treatment method, the twin-screw crusher has a distance between two shafts of 1.5 cm to 7.0 cm.
[0012]
And in order to set the distance between the two shafts of the twin-screw crusher to 1.5 cm or more and 7.0 cm or less, the waste is crushed into a shape that allows easy stirring and mixing during tempering with a low load, The refining property is improved, and the shape difference between a light-weight contaminant such as a vinyl product or a plastic material and an organic material is likely to occur, and the separation and removal of the contaminant by solid-liquid separation is facilitated, thereby improving the processing efficiency. If the distance between the two axes is narrower than 1.5 cm, the shape of the light contaminants such as vinyl and plastics approximates the shape of the organic matter, and the solid-liquid separation between the contaminant and the organic matter decreases. , Processing efficiency decreases. In addition, when the distance between the two axes is wider than 7.0 cm, the organic waste such as root vegetables becomes insufficiently crushed and the tempering property is lowered, so the distance between the two axes is 1.5 cm. Set to 7.0 cm or less.
[0013]
Claim 4 The waste disposal method described in claim 1 In the above-mentioned waste treatment method, when 15% or more of contaminants are contained, crushing is performed using a screw press after removing the metallic impurities, and the filtrate to be conditioned by this pressing is collected. To do.
[0014]
And since the filtrate for crushing and squeezing organic waste containing 15% or more of impurities with a screw press is collected, it is tempered even if the percentage of impurities per volume is crushed. Even organic waste containing 15% or more of contaminants that makes stirring and mixing difficult at the time can be subjected to methane fermentation treatment.
[0015]
Claim 5 The waste disposal method described in claim 1 to claim 1 4 In the waste treatment method according to any one of the above, the solid-liquid separation is performed using a screw press.
[0016]
And, since the tempered waste is squeezed using a screw press and separated into solids and a separation liquid for methane fermentation treatment, for example, the ratio of particularly metallic impurities is mixed. When processing low waste, etc., it is possible to separate and remove the contaminants at a high level without removing the contaminants after crushing, and the organic matter adhering to the contaminants can be recovered at a high level and contaminated with the organic matter attached. Odors are less likely to occur when processing an object, and it becomes easy to process the foreign matter, and the organic matter discharged together with the foreign matter is reduced to improve the processing efficiency of the organic matter. In addition, when many metallic impurities which may damage a screw press are included, it is good to isolate | separate and remove metallic impurities beforehand.
[0017]
Claim 6 The waste disposal method described in claim 1 to claim 1 4 In the waste treatment method according to any one of the above, after the waste is crushed, the waste is separated and removed before being stirred and mixed to be tempered.
[0018]
In addition, since the refining is performed after separating and removing impurities from the crushed waste, the refining properties such as stirring and acid fermentation during refining are improved, and the load of solid-liquid separation after refining is reduced. In addition, since solid-liquid separation can be easily performed with a simple configuration, the separation and removal rate of contaminants can be improved with a simple configuration while reducing discharge of organic materials to be treated together with the contaminants.
[0019]
Claim 7 The waste disposal method described in claim 6 In the waste treatment method described above, the trommel is used for separating and removing impurities from the crushed waste, and the drum-screen is used for solid-liquid separation of the waste after tempering.
[0020]
And the crushed waste can be easily transported in order to improve the temperability with a simple structure by separating and removing particularly coarse impurities using a trommel, A drum screen with a simple structure can be used for solid-liquid separation after tempering. Moreover, in order to solid-liquid-separate the foreign material from the waste after the tempering by the drum screen, the foreign material is highly separated and removed while preventing the drum screen from being blocked.
[0021]
Claim 8 The waste disposal method described in claim 7 In the described waste disposal method, the trommel has a larger mesh size than that when the waste is crushed.
[0022]
And since the size of the trommel is set larger than the size when the waste is crushed, organic matters are discharged together with the coarse impurities, lightweight impurities such as vinyl or plastic, and the impurities. The amount is reduced, and contaminants are easily separated and removed easily with a simple configuration.
[0023]
Claim 9 The waste disposal method described in claim 7 Or 8 In the waste treatment method described, the dust separated into solid and liquid on the drum screen is compressed using a screw press, and the compressed solution for methane fermentation treatment is collected together with the separated liquid separated on the drum screen. To do.
[0024]
Then, the impurities separated into solid and liquid on the drum screen are squeezed using a screw press, and the resulting compressed solution is subjected to methane fermentation treatment with the separated liquid separated into solid and liquid on the drum screen. This makes it possible to collect the organic matter, and it is difficult to produce bad odors when processing the foreign matter to which the organic matter is attached, and it becomes easy to treat the foreign matter.
[0025]
Claim 1 0 The waste disposal method described in claim 7 Or 9 In the waste treatment method according to any one of the above, the tempering is performed by removing the impurities separated and removed by the trommel together with the waste from which the impurities have been removed by the trommel.
[0026]
Then, the foreign matter separated and removed by the trommel is mixed with the waste from which the foreign matter has been removed for tempering, so that it adheres to the foreign matter due to the external action of acid fermentation and stirring that occurs during tempering. Oxidation is easy to separate when organic substances are easily separated, and it is difficult to produce bad odors when processing impurities with organic substances attached, and processing efficiency is improved by reducing the amount of organic substances discharged together with impurities. To do.
[0027]
Claim 1 1 The waste disposal method described in claim 1 to claim 1 4 In any one of the waste disposal methods, tempering is performed using a tempering tank having solid-liquid separation means at a position where waste can be stored inside and the stored waste at the bottom is discharged, Solid-liquid separation is performed by discharging waste stored in the interior to the outside of the refining tank through the solid-liquid separation means.
[0028]
When the waste conditioned in the tempering tank is discharged to the outside through the solid-liquid separation means provided at the bottom of the tempering tank for tempering the crushed waste, Since liquids are separated and impurities are separated and removed, solid-liquid separation after tempering can be performed with a simple configuration.
[0029]
Claim 1 2 The waste disposal method described in claim 1 1 In the waste treatment method described, the impurities separated by solid-liquid separation by the solid-liquid separation means are compressed using a screw press after separating and removing the metallic waste, and a compressed liquid for methane fermentation treatment is used. It is something to collect.
[0030]
Then, when discharging the waste conditioned in the tempering tank to the outside, the solid waste separated by solid-liquid separation means is squeezed using a screw press after separating and removing the metallic waste. In order to collect the squeezed liquid for methane fermentation treatment, the organic matter adhering to the foreign matter can be highly recovered without damaging the screw press, and it is hard to produce bad odor when processing the foreign matter adhering to the organic matter, The disposal of impurities is facilitated, and the organic matter discharged together with the impurities is reduced to improve the treatment efficiency of the organic matter.
[0031]
Claim 1 3 The described waste treatment apparatus includes a crushing unit for crushing organic waste, a tempering unit for stirring and mixing the waste crushed by the crushing unit, and a tempering unit. Solid-liquid separation means for separating and removing impurities from the prepared waste and separating the separated liquid for methane fermentation treatment; A cleaning means for cleaning the impurities removed by the solid-liquid separation means; and a return means for returning the cleaning drainage generated by the cleaning of the impurities from the cleaning means to the refining means. Is.
[0032]
Then, the organic waste is crushed by a crushing means, the crushed waste is stirred and mixed by a tempering means, and the conditioned waste is mixed with a solid-liquid separation means. Since the separation liquid for separation and removal and methane fermentation treatment is collected, the external action of acid fermentation and agitation generated during tempering easily separates impurities and waste, and the solid liquid after tempering Separation becomes easy, the structure is simplified, and the removal rate of contaminants is improved while reducing organic matter discharged together with the contaminants.
[0033]
Also, Washing the solid-liquid separated contaminants with the cleaning means, returning the cleaning waste liquid containing the organic matter adhering to the contaminants to the tempering means with the return means, and conditioning with the crushed waste Therefore, malodors are less likely to occur when processing the foreign matter to which the organic matter has adhered, and the processing of the foreign matter is facilitated, and the organic matter discharged together with the foreign matter is reduced and the processing efficiency of the organic matter is improved. Furthermore, the water added during the tempering is supplemented by the washing waste liquid, so that it is not necessary to use water separately, and the waste processing efficiency is improved.
[0034]
Claim 1 4 The waste disposal apparatus according to claim 1. 3 In the above-mentioned waste disposal apparatus, the crushing means includes a twin-screw crusher.
[0035]
Since the waste is crushed using a twin-screw crusher, the waste can be crushed with a simple structure together with the trash, and lightweight trash such as vinyl and plastic is crushed into a string. These vinyl materials and plastics can be easily separated and removed.
[0036]
Claim 1 5 The waste disposal apparatus according to claim 1. 3 In the waste disposal apparatus, the crushing means includes a metal removing means for separating and removing metal impurities from the waste, and the waste from which the metal impurities are separated and removed by the metal removing means. A screw press for crushing.
[0037]
And, in order to crush the waste from which metal impurities have been separated and removed by the metal removing means with a screw press, for example, even if the proportion of impurities per volume is crushed, stirring and mixing at the time of tempering Even organic waste containing 15% or more of difficult impurities can be subjected to methane fermentation treatment.
[0038]
Claim 1 6 The waste disposal apparatus according to claim 1. 3 1 5 In any one of the waste treatment apparatuses, the refining means includes a refining tank into which the waste is charged, and a discharge port for discharging the waste that is provided and stored at the bottom of the refining tank, The solid-liquid separation means is provided with a screen provided at the bottom of the tempering tank with the discharge port closed to separate impurities from the waste.
[0039]
And, when discharging the tempered waste from the exhaust port to the outside of the tempering tank through the solid-liquid separation means provided at the bottom of the tempering tank to condition the crushed waste Since the product is removed by solid-liquid separation, solid-liquid separation after tempering can be easily performed with a simple configuration.
[0040]
Claim 1 7 The waste disposal apparatus according to claim 1. 3 1 6 In the waste treatment apparatus according to any one of the above, the solid-liquid separation unit includes a foreign matter separation unit that separates and removes foreign matter from the waste that has been conditioned by the tempering unit, and the foreign matter is separated by the foreign matter separation unit. A screw press that squeezes the separated and separated waste and collects the separated liquid.
[0041]
Then, the waste after the tempering is separated and removed by the foreign matter separating means, and the waste from which the foreign matter has been separated and removed is squeezed with a screw press to collect a separation liquid for methane fermentation treatment. Therefore, impurities can be reliably separated and removed, and the occurrence of scum during methane fermentation is prevented.
[0042]
Claim 18 The described waste treatment apparatus includes a crushing means for crushing organic waste, a contaminant removing means for separating and removing impurities from the waste crushed by the crushing means, and a contaminant removing means. The tempering means for stirring and mixing the waste from which the impurities have been separated and removed, and the separation liquid for separating and removing the impurities from the waste tempered by the tempering means to separate the methane fermentation And solid-liquid separation means.
[0043]
Then, the organic waste is crushed by the crushing means, the crushed waste is separated and removed by the impurities removing means, and the waste from which the impurities are separated and removed is stirred by the tempering means. Mixing and tempering, the separated waste is separated and removed from the conditioned waste by solid-liquid separation means and methane fermentation treatment is collected. As a result, a certain amount of contaminants is separated and removed, improving the tempering properties such as stirring and acid fermentation during tempering, and reducing the load of solid-liquid separation of contaminants by the solid-liquid separation means after tempering. Since the solid-liquid separation of the contaminants can be easily performed with a simple configuration, the separation and removal rate of the contaminants is improved with the simple configuration while reducing the discharge of the organic matter to be processed together with the contaminants.
[0044]
Claim 19 The waste disposal apparatus as claimed in claim 18 In the described waste treatment apparatus, the contaminant removal means includes trommel, and the solid-liquid separation means includes a drum screen.
[0045]
The crushed waste can be tempered with a simple structure by using trommel to separate and remove particularly coarse contaminants, making it easy to transport waste for tempering. A drum screen with a simple structure can be used for subsequent solid-liquid separation. Moreover, in order to solid-liquid-separate the foreign material from the waste after the tempering by the drum screen, the foreign material is highly separated and removed while preventing the drum screen from being blocked.
[0046]
Claim 2 0 The waste disposal apparatus as claimed in claim 19 In the described waste treatment apparatus, the trommel has a mesh size larger than that when the waste is crushed.
[0047]
And since the size of the trommel is set larger than the size when the waste is crushed, organic matters are discharged together with the coarse impurities, lightweight impurities such as vinyl or plastic, and the impurities. The amount is reduced, and contaminants are easily separated and removed easily with a simple configuration.
[0048]
Claim 2 1 The waste disposal apparatus as claimed in claim 19 Or 2 0 In the waste treatment apparatus described above, the solid-liquid separation means includes a screw press that squeezes the impurities separated and removed by the drum screen and collects the squeezed liquid to be subjected to methane fermentation together with the separated liquid separated by the drum screen. It is a thing.
[0049]
Then, the impurities separated into solid and liquid on the drum screen are squeezed using a screw press, and the squeezed solution for methane fermentation treatment is collected together with the separated solution separated on the drum screen, so that the organic matter adhering to the impurities can be recovered. Further, when processing the foreign matter to which the organic matter is attached, it is difficult to generate a bad odor, and the processing of the foreign matter is facilitated, and the organic matter discharged together with the foreign matter is reduced and the processing efficiency of the organic matter is improved.
[0050]
Claim 2 2 The waste disposal apparatus as claimed in claim 19 Or 20 The waste treatment apparatus according to any one of the above, further includes a re-collection unit that inputs the impurities separated and removed by the trommel into the refining unit.
[0051]
And, since the impurities separated and removed by the trommel are put into the tempering means by the re-collecting means and tempered together with the waste from which the impurities are separated and removed by the trommel, the acid fermentation produced during the tempering The organic matter adhering to the contaminants can be easily separated by the physical action of stirring, and the generation of bad odors when treating the contaminants with the organic matter attached is suppressed, and the disposal of the contaminants becomes easy. At the same time, the organic matter discharged is reduced and the processing efficiency is improved.
[0052]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the configuration of an embodiment of the waste treatment apparatus of the present invention will be described with reference to FIG.
[0053]
In FIG. 1, reference numeral 1 denotes a twin-screw crusher as a crushing means. This twin-screw crusher 1 is an organic waste, that is, a waste material such as raw garbage, a urine system such as manure and septic tank sludge. Organic industrial waste such as wastewater, food processing sludge, wastewater containing village wastewater, sewage sludge, livestock manure and other waste containing organic matter is crushed. The outer peripheral surface (not shown) has a predetermined pitch, for example, 2 cm to 4 cm. A pair of rotating shafts are provided so that a plurality of crushing blades integrally provided at a pitch are overlapped in the axial direction. The distance between the two axes is set to be 1.5 cm or more and 7.0 cm or less. In other words, when the distance between the two axes is narrower than 1.5 cm, the shape of light-weight contaminants such as vinyl and plastics and organic matter such as vegetable waste, which is raw garbage, approximates, and contamination in subsequent processes. The solid-liquid separation property between the waste and the waste is lowered, and the processing efficiency is lowered. Also, if the distance between the two axes is wider than 7.0 cm, the organic waste such as root vegetables is not sufficiently crushed and the tempering properties in the subsequent process are reduced, so the distance between the two axes. Is set to 1.5 cm or more and 7.0 cm or less.
[0054]
Then, the biaxial crusher 1 crushes the waste, thereby crushing the organic matter to about 2 to 4 cm, and crushing lightweight impurities such as vinyl and plastic into a slightly larger string.
[0055]
The biaxial crusher 1 is connected to a trommel 2 as a contaminant removal means. As shown in FIG. 2, the trommel 2 has a substantially cylindrical shape into which waste crushed by the biaxial crusher 1 is introduced on the inner peripheral side. For example, the pitch at the time of crushing the biaxial crusher A plurality of through holes 3 are provided with a mesh size of 2 cm to 8 cm, which is slightly larger than the size of the mesh width. Furthermore, the axial direction is disposed with an inclination of about 2 ° to 10 ° with respect to the horizontal direction. The trommel 2 breaks the crushed waste through the through-holes 3, such as styrene tray pieces, plastic pieces and vinyl pieces that cannot pass through the through-holes 3. Separated into heavy crushed materials such as vegetable waste.
[0056]
If the mesh width of the trommel 2 is smaller than 2 cm, most of the pulverized waste is discharged as impurities, and organic matter for methane fermentation treatment in the subsequent process cannot be obtained. In addition, when the mesh width dimension is larger than 8 cm, it becomes impossible to separate and remove the contaminants through the through-hole 3 to the light-weight contaminants such as the vinyl pieces in a string shape. Set to. Further, if the inclination is smaller than 2 °, the crushed waste that has been sequentially fed cannot move on the inner peripheral side of the trommel 2 and cannot be separated into foreign matter and crushed material. In addition, if the inclination is larger than 10 °, the inclination becomes steep, and the waste thrown into the inner peripheral side immediately passes through and is discharged as impurities with almost no separation between the impurities and crushed materials. Is set to 2 ° to 10 °.
[0057]
Since the trommel 2 has a simple cylindrical shape and does not have a member projecting on the inner peripheral surface, the crushed material that permeates the inner peripheral side is caught by the projecting member, and the through-hole 3 is blocked and is contaminated. Can be prevented from being separated from the crushed material and the inner peripheral side passability is impaired and the processing efficiency is reduced, and the generation of odors and pests such as spiders from the crushed material is suppressed. it can.
[0058]
Furthermore, a tempering tank 4 as a tempering means is connected to the trommel 2. The tempering tank 4 has, for example, 0.8 kw / m as a stirring means. ³ 3 suspension type screw stirrers are suspended and supported at the bottom, for example, 4.8 kw / m as a stirring means. ³ And a heating means (not shown) for heating the crushed material is provided. In addition, although this heating means does not need to be provided, it is good to provide in order to advance the acid fermentation in the case of tempering and to improve the efficiency of the methane fermentation process in a post process.
[0059]
In addition, the crushed material put into the tempering tank 4 is appropriately added with moisture so that the moisture content is about 85% to 90%, and stirred and mixed while heating. If the water content is less than 85%, it becomes difficult to stir and transport to the subsequent process. If the water content exceeds 90%, the concentration decreases and the efficiency of methane fermentation in the subsequent process decreases. It is set to about 85% to about 90%.
[0060]
And the crushed material thrown in in this tempering tank 4 is stirred and mixed, for example, heating for 1 to 15 hours, acid fermentation progresses a little by heating, crushed material is cut | judged by stirring, and is slurry-like. It becomes a tempered product.
[0061]
The tempering tank 4 is connected to a drum screen 6 constituting solid-liquid separation means 5. The drum screen 6 has a mesh size of 1 cm to 3 cm which is slightly smaller than 2 cm to 4 cm which is the size of the mesh when crushing, for example. Here, if the mesh size of the drum screen 6 is smaller than 1 cm, the proportion of the organic matter to be subjected to the methane fermentation treatment in the tempered product increases as impurities. Further, when the mesh width dimension is larger than 3 cm, most of the contaminants pass through and the contaminants cannot be separated and removed, so the mesh width dimension is set to 1 cm to 3 cm.
[0062]
The drum screen 6 separates the tempered material, which is a crushed material conditioned in the tempering tank 4, into a slurry-like separated liquid and a heavy material such as a glass piece or a metal piece. The tempered material is a slurry with a total solid content (TS concentration) of 15% or less, so it is a wet fractionation device with a simple structure and a high separation property between the impurities and the separation liquid treated with methane fermentation. A certain drum screen 6 is used to perform solid-liquid separation into impurities and separated liquid.
[0063]
The drum screen 6 is connected to a screw press 7 constituting the solid-liquid separation means 5. And this screw press 7 squeezes the foreign substance solid-liquid-separated with the drum screen 6, and collects a pressing liquid, and the pressing liquid is a methane fermentation process process of a post process with the separated liquid isolate | separated with the drum screen 6. It is conveyed to.
[0064]
Next, the operation of the above embodiment will be described.
[0065]
The waste is crushed to about 2 cm to 4 cm by the twin-screw crusher 1. In addition, organic matters such as vegetable waste in the waste are crushed to about 2 cm to 4 cm, and lightweight impurities such as vinyl and plastic are crushed into a slightly larger string.
[0066]
The crushed waste is put into the trommel 2, and in particular, lightweight impurities crushed in a string cannot pass through the through holes 3 of the trommel 2 and are discharged from the inner peripheral side of the trommel 2 as contaminants. The organic matter crushed to about 2 cm to 4 cm passes through the through-hole 3 and is collected as a crushed matter, and is separated into foreign matter and crushed matter. The foreign substances are separately processed into solid fuel or incinerated.
[0067]
Furthermore, the crushed material is put into the tempering tank 4, moisture is appropriately added so that the moisture content is about 85% to 90%, and while being heated by a heating means (not shown), The mixture is stirred and mixed with a pulper type screw stirrer to form a slurry-like tempered product.
[0068]
Next, the tempered material is thrown into the drum screen 6 of the solid-liquid separation means 5, and light impurities such as vinyl that remain without being separated and removed by the slurry-like separation liquid and the trommel 2, especially glass pieces and metals. Solid-liquid separation into heavy impurities such as pieces. Then, the slurry-like separation liquid is transported to the subsequent methane fermentation treatment step and subjected to methane fermentation treatment. Further, the foreign matter separated from the solid and the liquid by the drum screen 6 is put into a screw press 7 and pressed to be separated into a foreign matter and a pressed liquid. The pressed liquid is a methane fermentation process in the subsequent step in the same manner as the separated liquid. It is transported to the process and processed for methane fermentation. In addition, foreign materials are used separately as building materials or landfilled.
[0069]
As described above, the organic waste is crushed together with impurities, stirred and mixed while warming, and then subjected to solid-liquid separation into impurities and a separation liquid for methane fermentation. The physical action, which is the external mechanical action of acid fermentation and agitation that occurs during quality, makes it easy to separate impurities and waste, and facilitates solid-liquid separation after tempering and simplifies the structure. It is possible to improve the removal rate of impurities while reducing the organic matter discharged together with the impurities.
[0070]
In addition, since the waste was crushed using the twin-screw crusher 1 having two axes in which the crushing blades overlap each other in the axial direction, the waste can be crushed together with impurities with a simple structure, and vinyl or plastic The lightweight contaminants can be crushed into a string shape having a different size from that of the organic material, and separation and removal of these vinyl materials and plastics can be facilitated.
[0071]
Furthermore, since the distance between the two shafts of the twin-screw crusher 1 is set to 1.5 cm or more and 7.0 cm or less, the waste can be crushed into a shape that allows easy stirring and mixing during tempering with a low load. In addition to improving the tempering properties, it is easy to make a difference in the shape between lightweight contaminants such as vinyl and plastic, and organic matter, and it is easy to separate and remove contaminants by solid-liquid separation, improving processing efficiency. it can.
[0072]
In addition, since the trash is separated and removed from the crushed waste by Trommel 2, the tempering such as stirring and acid fermentation during tempering can be improved, and solid-liquid separation after tempering can be improved. Since the load is reduced and the solid-liquid separation can be easily performed with a simple configuration, the separation and removal rate of the contaminants can be improved with a simple configuration while reducing the discharge of the organic matter to be treated together with the contaminants.
[0073]
The crushed waste can be improved in temperability with a simple structure by separating and removing particularly coarse impurities using the trommel 2 and can be easily transported for tempering. The drum screen 6 having a simple structure can be used for solid-liquid separation after tempering. Further, since the contaminants are solid-liquid separated from the tempered waste by the drum screen 6, the contaminants can be separated and removed highly while preventing the drum screen 6 from being blocked.
[0074]
In addition, since the size of the trommel 2 is set larger than the size of the mesh used when crushing waste, organic matter is discharged together with the coarse impurities and lightweight impurities such as vinyl or plastic. The amount of contamination can be reduced, and contaminants can be easily separated and removed with a simple configuration.
[0075]
In addition, the impurities separated by solid and liquid on the drum screen 6 are squeezed using a screw press 7, and the resulting compressed solution is subjected to methane fermentation treatment with the separated liquid separated on the drum screen 6. Organic matter that adheres can be recovered, and it is hard to produce bad odors when processing foreign matter to which the organic matter has adhered, and it is possible to easily treat the foreign matter, and the organic matter discharged together with the foreign matter can be reduced to improve the processing efficiency of the organic matter. .
[0076]
In the above-described embodiment, the contaminants obtained by squeezing and dehydrating the contaminants that have been squeezed and dehydrated by the screw press 7 of the solid-liquid separation means 5 may be landfilled. The cleaning waste liquid obtained by processing such as processing into building materials may be returned to the tempering tank 4 or conveyed to the methane fermentation treatment step together with the separation liquid and the pressing liquid. According to this configuration, the organic matter adhering to the foreign matter can be collected, and when processing the foreign matter to which the organic matter adheres, malodor is less likely to occur, and the disposal of the foreign matter becomes easy. This reduces the organic matter processing efficiency. Furthermore, in the configuration in which the cleaning waste liquid is returned to the refining tank 4, the water added during the refining is supplemented with the cleaning waste liquid, so that it is not necessary to use water separately, and the waste processing efficiency can be improved.
[0077]
Moreover, the foreign material isolate | separated with the trommel 2 may be conveyed to the tempering tank 4, and may be tempered with the isolate | separated crushed material. That is, for example, rice grains that are organic matter to be methane-fermented and stuck to lightweight contaminants such as vinyl pieces and polystyrene tray pieces cannot be recovered as crushed material by Trommel 2 and are discharged together with lightweight impurities. For this reason, the improvement of the processing efficiency of organic matter cannot be expected, and the processing of the foreign matter to which the organic matter adheres becomes complicated such as generating a bad odor, and the apparatus may be increased in size. Therefore, once tempered with the crushed material in the tempering tank 4, the organic matter adhering to the contaminants can be easily separated by the external action of acid fermentation and stirring generated during the tempering, and the organic matter remains attached. It is possible to suppress the generation of bad odor when processing the foreign matter, and to facilitate the processing of the foreign matter, and to reduce the organic matter discharged together with the foreign matter and improve the processing efficiency.
[0078]
The crushing means is not limited to the biaxial crusher 1, and any crushing means can be used. In addition, like the twin-screw crusher 1, it can be crushed with impurities with a simple structure, and the shape after crushing of lightweight impurities such as vinyl can be separated and removed. What can be crushed is preferable.
[0079]
Further, the contaminant removing means is not limited to the trommel 2 and any one can be used, and the contaminant removing means such as the trommel 2 may not be provided. That is, after crushing, it may be tempered together with impurities, and the tempered material may be solid-liquid separated with a screw press 7 or a drum screen 6. In addition, since the total solid (TS concentration) is 15% or more at the time after the crushing, a dry separation apparatus such as a trommel is preferable. In addition, a structure such as a trommel 2 that is simple and is unlikely to catch waste is preferable.
[0080]
Further, the solid-liquid separation means 5 is not limited to the drum screen 6 and may be any one. As described above, a drum screen 6 that has a simple structure and high separation / removability of impurities is particularly preferable.
[0081]
Moreover, although the structure provided with the screw press 7 as the solid-liquid separation means 5 was demonstrated, the screw press 7 does not need to be provided. In addition, when squeezing impurities with the screw press 7, if a lot of metals or glass pieces are included in the impurities, the metal press or the glass piece is once squeezed, and the screw press 7 It is configured to prevent damage from metal pieces or glass pieces.
[0082]
On the other hand, if the waste to be treated has a total solids (TS concentration) of more than 15%, a screw press is used without crushing by the twin-screw crusher 1 and removal of impurities by the trommel 2. It is good to squeeze and to temper the obtained compressed liquid. That is, even if the organic waste containing 15% or more of impurities is crushed and squeezed by the screw press 7 and the filtrate is collected for tempering, even if the amount of impurities per volume is crushed Even organic waste containing 15% or more of contaminants that makes stirring and mixing during tempering difficult, enables methane fermentation treatment.
[0083]
Next, another embodiment of the present invention will be described with reference to FIGS.
[0084]
In the embodiment shown in FIGS. 3 and 4, the tempering tank 4 of the embodiment shown in FIGS. 1 and 2 is provided with a solid-liquid separation means 5.
[0085]
That is, in FIG. 3, a tempering tank 11 as a tempering means is connected to the biaxial crusher 1. As shown in FIG. 4, the tempering tank 11 includes an inlet 12 for introducing the waste crushed by the twin-screw crusher 1, and an outlet 13 for opening the conditioned material opened at the bottom. A screen 14 serving as a solid-liquid separation means is provided so as to close the discharge port 13. The screen 14 is formed in a punching metal shape in which a plurality of substantially circular insertion holes 15 are formed.
[0086]
In the tempering tank 11, as in the embodiment shown in FIGS. 1 and 2, for example, 0.8 kw / m as a stirring means is used. ³ 3 suspension type screw stirrers 17 are supported by hanging, and the bottom part is, for example, 4.8 kw / m as a stirring means. ³ And a heating means (not shown) for heating the crushed material. Note that a plurality of scrapers 19, 19 project radially from the pulper screw agitator 18 so as to face the screen 14. Furthermore, the tempering tank 11 is formed with an opening for discharging a foreign matter 20 through which the foreign matter scraped off by the scrapers 19 and 19 is discharged.
[0087]
The crushed material introduced into the tempering tank 11 from the inlet 12 is appropriately added with moisture so that the moisture content is about 85% to 90%, and stirred and mixed while being heated. Fermentation proceeds slightly and the crushed material is cut by stirring to become a slurry-like tempered product. Furthermore, the tempered material is solid-liquid separated by the screen 14 into a slurry-like separation liquid and foreign matters such as vinyl pieces, glass pieces and metal pieces, and the foreign matters cannot pass through the insertion holes 15 of the screen 14. The separated liquid is stored on the screen 14, passes through the insertion hole 15, and is transported to the methane fermentation treatment process in the subsequent process. The foreign matter is scraped off by the scrapers 19 and 19 and discharged from the foreign matter discharge port 20 to the outside of the refining tank 11, and the screen 14 is not blocked.
[0088]
Thus, according to the embodiment shown in FIG. 3 and FIG. 4, the screen 14 is provided at the position where the conditioned material is discharged at the bottom of the tempering tank 11, and impurities are removed. By separating the impurities and the waste easily by the external action by stirring, the impurities can be highly solid-liquid separated with a simple configuration.
[0089]
In addition, since the screen 14 is provided at the bottom of the tempering tank 11, solid-liquid separation can be performed at the same time when the tempered material is discharged by gravity, so that solid-liquid separation can be facilitated.
[0090]
In the embodiment shown in FIG. 3 and FIG. 4, the separation liquid for solid-liquid separation on the screen 14 may be further compressed with a screw press to separate the separation liquid for methane fermentation treatment. According to this structure, impurities can be further separated and removed, and the occurrence of scum during methane fermentation can be prevented.
[0091]
Further, as described in the embodiment shown in FIG. 1 and FIG. 2, the contaminants obtained by solid-liquid separation on the screen 14 are washed by a washing means and the solid-liquid separation is performed as landfills. The cleaning waste liquid obtained may be returned to the tempering tank 11 or conveyed to the methane fermentation treatment step together with the separated liquid.
[0092]
Further, as described in the embodiment shown in FIG. 1 and FIG. 2, the foreign matter separated by solid-liquid separation on the screen 14 is squeezed by the screw press 7, and the obtained squeezed liquid is returned to the tempering tank 11. Or you may convey to a methane fermentation process process with a separated liquid.
[0093]
The screen 14 is used as the solid-liquid separation means, but other configurations may be used.
[0094]
In addition, when the amount of hard impurities such as metal pieces and glass pieces in the waste is small, the screen 14 is not provided, and the conditioned material discharged from the tempering tank 11 is squeezed by the screw press 7, You may put a pressing liquid in a methane fermentation treatment process. According to this configuration, impurities can be separated and removed with a simple configuration, and organic matter can be highly recovered. In addition, when metal or the like is mixed in the waste, metallic impurities or the like may be removed in advance before the screw press.
[0095]
【The invention's effect】
According to the waste treatment method according to claim 1, after organic waste is crushed together with impurities, mixed by stirring and tempered, it is separated into impurities and a separation liquid for methane fermentation treatment. Therefore, it is possible to easily separate impurities and waste by physical action such as acid fermentation that occurs during tempering and cutting by stirring, so that solid-liquid separation after tempering is easy and the structure can be simplified. The removal rate of impurities can be improved while reducing the organic matter discharged together with the impurities.
[0096]
Also, Cleaning the solid-liquid separated contaminants and tempering the washed waste liquid containing the organic matter adhering to the contaminants together with the crushed waste. Generation | occurrence | production can be prevented and a foreign substance can be processed easily, and the organic matter discharged | emitted with a foreign substance can reduce, and the processing efficiency of an organic substance can be improved. Furthermore, the water added at the time of tempering is supplemented by the washing waste liquid, so that it is not necessary to use water separately, and the waste processing efficiency can be improved.
[0097]
Claim 2 According to the described waste treatment method, the claim 1 In addition to the effects of the waste treatment methods listed above, the waste is crushed using a twin-screw crusher with two shafts whose crushing blades overlap each other in the axial direction. In addition, since lightweight impurities such as vinyl and plastic are crushed into a string shape, these vinyl and plastic can be easily separated and removed.
[0098]
Claim 3 According to the described waste treatment method, the claim 2 In addition to the effects of the waste treatment method described above, the distance between the two shafts of the twin-screw crusher is set to 1.5 cm or more and 7.0 cm or less, so that stirring and mixing during tempering can be easily performed with low load. The waste can be crushed and the temperability can be improved, and the difference in shape between lightweight impurities such as vinyl and plastics and organic matter is likely to occur, making it easier to separate and remove the impurities by solid-liquid separation. Processing efficiency can be improved.
[0099]
Claim 4 According to the described waste treatment method, the claim 1 In addition to the effects of the listed waste treatment methods, the organic waste containing 15% or more of contaminants is crushed and squeezed with a screw press to collect the filtrate. Even an organic waste containing 15% or more of contaminants that are difficult to stir and mix during tempering can be subjected to methane fermentation treatment even if the ratio is crushed.
[0100]
Claim 5 According to the described waste disposal method, claims 1 to 4 In addition to the effect of the waste treatment method according to any one of the above, in order to solid-liquid-separate the waste after tempering into a separated liquid and a separation liquid for methane fermentation treatment by pressing using a screw press, for example In particular, when processing waste with a low rate of contamination with metallic impurities, etc., it is possible to separate and remove the impurities at once without removing the impurities after crushing, and adhere to the impurities. Organic matter can be collected at a high level, and it is difficult to produce bad odors when processing contaminants to which organic matter adheres. The contaminants can be easily processed, and the organic matter discharged with the contaminants can be reduced to improve the processing efficiency of the organic matter. .
[0101]
Claim 6 According to the described waste disposal method, claims 1 to 4 In addition to the effect of any one of the waste treatment methods described above, in order to temper after separating and removing impurities from the crushed waste, the tempering properties such as stirring and acid fermentation during tempering can be improved, Since the load of solid-liquid separation after tempering is reduced and solid-liquid separation can be easily performed with a simple configuration, the separation and removal rate of contaminants with a simple configuration is reduced while reducing the discharge of organic matter to be processed together with the contaminants. Can be improved.
[0102]
Claim 7 According to the described waste treatment method, the claim 6 In addition to the effects of the waste disposal method described above, crushed waste is separated and removed by using trommel, especially coarse contaminants. And a drum screen with a simple structure can be used for solid-liquid separation after tempering. In addition, since the impurities are solid-liquid separated from the tempered waste on the drum screen, the impurities can be separated and removed at a high level while preventing the drum screen from being blocked.
[0103]
Claim 8 According to the described waste treatment method, the claim 7 In addition to the effects of the waste disposal method described above, Trommel's mesh size was set to be larger than the mesh size when crushing waste, so that coarse impurities, lightweight contaminants such as vinyl or plastic, The amount of organic matter discharged together with this contaminant can be reduced, and the contaminant can be easily separated and removed easily with a simple configuration.
[0104]
Claim 9 According to the described waste treatment method, the claim 7 Or 8 In addition to the effects of the waste treatment method described, the methane fermentation treatment is performed together with the separated liquid obtained by solid-liquid separation of the resulting compressed liquid using a drum screen by pressing the impurities separated by solid-liquid separation using a drum screen. Therefore, it is possible to recover the organic matter adhering to the contaminants, and it is difficult to generate a bad odor when processing the contaminants to which the organic matter adheres, and the contaminants can be easily treated, and the organic matter discharged together with the contaminants is reduced. The processing efficiency can be improved.
[0105]
Claim 1 0 According to the described waste treatment method, the claim 7 Or 9 In addition to the effect of the waste treatment method according to any one of the above, the impurities separated and removed by the trommel are mixed and tempered with the waste from which the impurities are removed, so that the acid fermentation generated during the tempering The organic matter adhering to the contaminants can be easily separated by the external action of the agitation, and the odor is not easily generated when the contaminants with the organic matter adhered are processed, and the contaminants can be easily treated and discharged together with the contaminants. The processing efficiency can be improved by reducing the amount of organic matter.
[0106]
Claim 1 1 According to the described waste disposal method, claims 1 to 4 In addition to the effect of any one of the waste treatment methods described above, the tempered waste in the tempering tank is brought to the outside via a solid-liquid separation means provided at the bottom of the tempered tank for tempering the crushed waste When discharging, solid-liquid separation is performed by solid-liquid separation means to separate and remove impurities, so that solid-liquid separation after tempering can be easily performed with a simple configuration.
[0107]
Claim 1 2 According to the described waste disposal method, the claim 1 1 In addition to the effects of the waste disposal method described above, the metallic waste is separated and removed from the solid-liquid separation means by the solid-liquid separation means when the waste conditioned in the tempering tank is discharged to the outside. In order to squeeze using a screw press and collect the squeezed liquid for methane fermentation, organic matter adhering to the contaminants can be recovered to a high degree without damaging the screw press. Odors are less likely to occur during the treatment, and impurities can be easily treated, and the organic matter discharged together with the impurities can be reduced to improve the treatment efficiency of the organic matter.
[0108]
Claim 1 3 According to the described waste treatment apparatus, the organic waste is crushed by the crushing means, the crushed waste is stirred and mixed by the tempering means, and the tempered waste is solidified. Separation and waste are separated easily by the physical action of acid fermentation and agitation that occurs during tempering because the separation liquid for separating and removing impurities by liquid separation means is collected. In addition, solid-liquid separation after tempering can be facilitated, the structure can be simplified, and the removal rate of contaminants can be improved while reducing organic matter discharged together with the contaminants.
[0109]
Also, Washing the solid-liquid separated contaminants with the cleaning means, returning the cleaning waste liquid containing the organic matter adhering to the contaminants to the tempering means with the return means, and conditioning with the crushed waste Therefore, malodors are less likely to occur when processing the foreign matter to which the organic matter has adhered, and the foreign matter can be easily treated, and the organic matter discharged together with the foreign matter can be reduced to improve the processing efficiency of the organic matter. Furthermore, the water added at the time of tempering is supplemented by the washing waste liquid, so that it is not necessary to use water separately, and the waste processing efficiency can be improved.
[0110]
Claim 1 4 According to the described waste disposal apparatus, the claim 1 3 In addition to the effects of the waste disposal equipment listed above, the waste is crushed using a twin-screw crusher, so the waste can be crushed with a simple structure and lightweight, such as vinyl or plastic. Since the objects are crushed into a string shape, these vinyl objects and plastics can be easily separated and removed.
[0111]
Claim 1 5 According to the described waste disposal apparatus, the claim 1 3 In addition to the effects of the waste treatment equipment listed above, the waste from which metal impurities have been separated and removed by the metal removal means is crushed with a screw press. However, even organic waste containing 15% or more of contaminants that are difficult to stir and mix during tempering and difficult to perform methane fermentation in the subsequent process can be subjected to methane fermentation while preventing damage to the screw press.
[0112]
Claim 1 6 According to the described waste disposal apparatus, the claim 1 3 1 5 In addition to the effect of any one of the waste treatment apparatuses described above, the conditioned waste is exhausted through a solid-liquid separation means provided at the bottom of the tempering tank for tempering crushed waste by closing the discharge port. When discharging from the mouth to the outside of the refining tank, impurities are removed by solid-liquid separation, so that solid-liquid separation after refining can be easily performed with a simple configuration.
[0113]
Claim 1 7 According to the described waste disposal apparatus, the claim 1 3 1 6 In addition to the effect of the waste treatment apparatus according to any one of the above, the waste after the tempering is separated and removed by the foreign matter separating means, and the waste from which the foreign matter has been separated and removed is compressed by a screw press. Then, since the separation liquid for methane fermentation treatment is collected, impurities can be reliably separated and removed, the occurrence of scum during methane fermentation can be prevented, and the processing efficiency of methane fermentation can be improved.
[0114]
Claim 18 According to the described waste treatment apparatus, the organic waste is crushed by the crushing means, the crushed waste is separated and removed by the contaminant removing means, and the waste is separated and removed. The product is stirred and mixed by the tempering means, and the tempered waste is separated and removed by the solid-liquid separation means to separate the separated liquid for methane fermentation treatment. Since some contaminants are separated and removed by the contaminant removal means before the refining, it is possible to improve the tempering properties such as stirring during the tempering and acid fermentation, and the contamination by the solid-liquid separation means after the tempering Since the load of solid-liquid separation can be reduced and the solids and liquids can be separated easily with a simple configuration, the separation and removal rate of contaminants can be reduced with a simple configuration while reducing the discharge of organic matter to be treated together with the foreign matters. It can be improved.
[0115]
Claim 19 According to the described waste treatment apparatus, the claim 18 In addition to the effects of the described waste treatment equipment, the crushed waste is separated and removed by using trommel, especially coarse impurities. Therefore, the waste can be transported to improve the temperability with a simple structure. And a drum screen with a simple structure can be used for solid-liquid separation after tempering. In addition, since the impurities are solid-liquid separated from the tempered waste on the drum screen, the impurities can be separated and removed at a high level while preventing the drum screen from being blocked.
[0116]
Claim 2 0 According to the described waste treatment apparatus, the claim 19 In addition to the effects of the waste disposal device described above, Trommel's mesh size was set to be larger than the mesh size when crushing waste, so that coarse impurities, lightweight impurities such as vinyl or plastic, While reducing the amount of organic matter discharged together with the impurities, it can be easily separated and removed with a simple configuration.
[0117]
Claim 2 1 According to the described waste treatment apparatus, the claim 19 Or 2 0 In addition to the effects of the waste treatment apparatus described, in order to collect the squeezed liquid to be subjected to methane fermentation treatment together with the separated liquid separated from the drum screen by pressing the impurities separated into solid and liquid on the drum screen using a screw press, Organic matter adhering to contaminants can be collected, and when processing impurities adhering to organic matter, bad odor is less likely to occur, impurities can be easily treated, and organic matter discharged with contaminants is reduced, resulting in organic substance processing efficiency Can be improved.
[0118]
Claim 2 2 According to the described waste treatment apparatus, the claim 19 2 1 In addition to the effect of the waste treatment apparatus according to any one of the above, the impurities separated and removed by the trommel are put into the refining means by the re-collection means, and the tempered together with the waste from which the impurities are separated and removed by the trommel. Therefore, it is possible to easily separate the organic matter adhering to the contaminants by the physical action of acid fermentation and stirring that occurs during the tempering, and to suppress the generation of malodor when processing the contaminants with the organic matter attached, Contaminants can be easily treated, and organic matter discharged together with the contaminants can be reduced to improve treatment efficiency.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of an embodiment of a waste treatment apparatus of the present invention.
FIG. 2 is a perspective view showing the trommel.
FIG. 3 is a block diagram showing the configuration of another embodiment of the waste treatment apparatus of the present invention.
FIG. 4 is a cross-sectional view showing the tempering tank.
[Explanation of symbols]
1 Twin-screw crusher as crushing means
2 Trommel as a means to remove impurities
4,11 Tempering tank as tempering means
5 Solid-liquid separation means
6 Drum screen constituting solid-liquid separation means
7 Screw press that constitutes solid-liquid separation means
14 Screen as solid-liquid separation means

Claims (22)

In a waste treatment method for tempering for methane fermentation by mixing organic waste mixed with impurities,
Crushing the waste before mixing and tempering the waste,
After the crushing and tempering, the waste is solid-liquid separated into the impurities and a separation liquid for methane fermentation treatment,
The tempering may, waste disposal way to and performing together with the waste is crushed and the resulting wash effluent was washing the contaminants and then subjected to solid-liquid separation. Crushing waste processing method according to claim 1 Symbol placement crushing blades is characterized by using a biaxial crusher having a biaxial mutually overlapping in the axial direction. Twin screw crusher, waste processing method according to claim 2, wherein a distance between two shafts is 1.5cm or 7.0cm or less. When crushing contains 15% or more of contaminants, the metallic contaminants are separated and removed and then compressed using a screw press.
Waste processing method according to claim 1 Symbol mounting, characterized in that partial collection of the filtrate for tempered by the squeezing. Solid waste separation is performed using a screw press. The waste disposal method according to any one of claims 1 to 4 characterized by things. The waste treatment method according to any one of claims 1 to 4 , wherein after the waste is crushed, the waste is separated and removed before the waste is stirred and mixed to be tempered. Trommel is used to separate and remove impurities from crushed waste.
The waste disposal method according to claim 6 , wherein the solid-liquid separation of the waste after tempering uses a drum screen. The waste treatment method according to claim 7 , wherein the trommel has a mesh size larger than that when the waste is crushed. The squeezed liquid for methane fermentation treatment is collected together with the separated liquid solid-liquid separated on the drum screen by pressing the impurities separated by solid-liquid on the drum screen. The waste disposal method according to 7 or 8 . The waste treatment method according to any one of claims 7 to 9 , wherein the tempering is performed by removing the impurities separated and removed by the trommel together with the waste from which the impurities have been removed by the trommel. The refining is performed using a refining tank equipped with solid-liquid separation means at a position where waste can be stored inside and the stored waste at the bottom is discharged.
Solid-liquid separation, waste of claims 1 to 4 any one, wherein the performing by discharging the waste stored in the internal outside of the refining vessel through the solid-liquid separation means Processing method. The impurities separated by solid-liquid separation by the solid-liquid separation means are separated and removed from the metallic waste, and then compressed using a screw press, and the compressed liquid for methane fermentation treatment is collected. waste treatment method in claim 1 1, wherein. Crushing means for crushing organic waste,
Conditioning means for stirring and mixing the waste material crushed by this crushing means,
A solid-liquid separation means for separating and removing a separated liquid from the waste prepared by the tempering means and collecting a separation liquid for methane fermentation treatment;
A cleaning means for cleaning contaminants were removed by this solid-liquid separation means,
A waste disposal apparatus comprising: a return means for returning the cleaning drainage generated by cleaning the contaminants from the cleaning means to the tempering means. Crushing means, according to claim 1 3 Symbol placement of waste treatment apparatus characterized by comprising a biaxially crusher. The crushing means is
Metal removal means for separating and removing metal impurities from waste,
This a metal removing means according to claim 1 3 Symbol placing the metallic contaminants is characterized in that a screw press to crush the waste is separated and removed waste disposal device. The tempering means is
A tempering tank into which waste is introduced;
A discharge port for discharging the waste to be stored at the bottom of the tempering tank;
Solid-liquid separation means, according to claim 1 3 to 1 5 any one according to further comprising a screen for separating the contaminants from the waste provided to close the outlet in the bottom of the refining vessel Waste treatment equipment. Solid-liquid separation means
Contaminant separating means for separating and removing impurities from waste conditioned by the tempering means;
Waste of the contaminant to contaminant in the separation means claims 1 3 which is characterized in that a screw press which divides Collection squeezed separation liquid the waste is separated and removed 1 6 any one described Processing equipment. Crushing means for crushing organic waste,
Contaminant removing means for separating and removing impurities from the waste crushed by the crushing means,
Conditioning means for stirring and mixing the waste from which the impurities have been separated and removed by the contaminant removal means,
A waste treatment apparatus comprising: solid-liquid separation means for separating and removing impurities from the waste conditioned by the tempering means and collecting a separated liquid for methane fermentation treatment. The foreign matter removing means includes a trommel,
The waste processing apparatus according to claim 18 , wherein the solid-liquid separation means includes a drum screen. The waste disposal apparatus according to claim 19 , wherein the trommel has a mesh size larger than that when the waste is crushed. Solid-liquid separation means, according to claim 19 which squeezes the contaminants separated in the drum screen, characterized by comprising a screw press for partial condensing methane fermentation to squeeze liquid with separated separated liquid in the drum screen or 2 0 waste disposal apparatus according. Waste processing apparatus to 19 claims, characterized in that it comprises a re-collection means for introducing contaminants separated removed temper means at the trommel 2 1 any one described.

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