JP5585950B2 - Fertilizer manufacturing method, fertilizer - Google Patents

Description

  The present invention uses a low water content, low chlorine, low potassium fertilizer using organic waste containing livestock excreta including livestock excrement such as chicken dung, cow dung, pig dung, etc., water content, chlorine concentration, potassium concentration More specifically, when fertilizing organic waste containing livestock excreta, fertilizers with low moisture content, low chlorine, and low potassium are used, and the moisture content, chlorine concentration, The present invention relates to a fertilizer having an optimized potassium concentration and a method for producing the same.

  Conventionally, livestock excreta containing livestock manure such as chicken manure, cow manure, and pig manure are produced by aerobic fermentation to produce compost, the water content of which is about 20 to 30% by weight for chicken manure and about 50% by weight for cow manure. It is about 40% by mass in feces.

  Conventionally, when livestock excrement including livestock excrement such as chicken droppings, cow droppings and pig droppings is subjected to aerobic fermentation to produce compost, chicken droppings have a chlorine concentration of 10,000 ppm, potassium concentrations of 30000 to 40000 ppm, and cow droppings have a chlorine concentration of 8000 ppm. The concentration of potassium is 30000-55000 ppm. In pig feces, the concentration of chlorine is 7000 ppm, and the concentration of potassium is 25000-30000 ppm.

  When fermenting livestock excrement and producing compost, even if the livestock excrement is subjected to aerobic fermentation as it is, livestock excrement has a high water content (for example, a water content of 80% by mass or more), so that fermentation is difficult to proceed. . For this reason, for example, after reducing the moisture content of livestock excrement by sun drying, dryer drying, etc., the method of fermenting and obtaining compost is known (for example, refer patent documents 1 and 2). In addition, a method is also known in which sawdust, rice husk, bark, etc. are mixed with livestock excrement to lower the water content of livestock excrement and then fermented to obtain compost.

  Also known is a method of reducing the water content by mixing chicken manure compost with a water content of about 20-30% by weight, cow manure compost with a water content of about 50% by weight, and pig manure compost with a water content of about 40% by weight. ing. The particle size of these composts becomes smaller as the water content is lower, but the diameter is about 20 to 80 mm for quail eggs to chicken eggs with chicken dung, the fist size is about 100 mm for pig dung, and the human head diameter is about 200 mm for cow dung. ) Are mixed together.

  As for organic compounds, compost is produced in various forms such as manure separation, manure mixing, feed and manure, and mixing depending on the structure of the barn, but at least 10% by weight or more of urine is mixed in the manure.

  It is known that weed seeds will die when the fermentation heat of composting is 60 ° C. or higher for 2 days, but this cannot be expected to die in the lump part, and is not dead in the lump having a diameter of 100 mm or more.

JP-A-4-4033 Japanese Patent Laid-Open No. 11-77095

  However, in order to reduce the water content of livestock excrement and to make the water content of compost about 20-30% by weight for chicken manure, about 50% by weight for cow manure and about 40% by weight for pig manure, In the case of the sun drying method, it is difficult to sufficiently reduce the moisture content in environments such as cold regions, winter seasons, and humid climates, and there is a problem that it takes time to evaporate the water to a predetermined moisture content. It was.

  In addition, the method of reducing the moisture content of livestock excrement by drying the dryer requires fossil fuels and a large amount of electric power, which increases the manufacturing cost and increases the amount of greenhouse gas emissions, which is favorable for the environment. Absent. On the other hand, the method of reducing the moisture content of livestock excrement by mixing sawdust, rice husk, bark wood, etc., in recent years has resulted in a decrease in the amount of these materials generated, resulting in a large amount of such sawdust, rice husk, bark wood, etc. at low cost. However, there is a problem that the manufacturing cost becomes high. Furthermore, since sawdust, rice husks, bark materials and the like are not fermented because fermentation does not proceed as compared with livestock excreta, compost with poor quality is produced.

  Since the present invention aims to produce a fertilizer having a moisture content lower than that of the paragraph “0002”, the low moisture content compost of the present invention is used for the reasons of the paragraphs “0008” and “0009”. Has been considered impossible to manufacture because of its efficiency and cost.

  On the other hand, the manufacture of compost with a moisture content of 25% by mass has been put to practical use when compost is made into pellets for the purpose of volume reduction and high price sales. The situation is tough for the price.

  The present invention has been made in view of the above circumstances, and provides a method for producing a fertilizer capable of appropriately adjusting the moisture content of compost and producing a low moisture content fertilizer at low cost and efficiently. The purpose is to do.

  Moreover, when using compost, the effect of a fertilizer and the effect of soil improvement are often calculated | required. In particular, when the effect of soil improvement is mainly sought, the chlorine concentration and potassium concentration have been lowered by exposure to rain in advance. Or, compost that was fully fermented by mixing a lot of sawdust, cereals, bark, etc. was preferred.

  Cultivation based on conventional knowledge of soil fertilizers due to the high concentration of chlorine and potassium due to the prohibition of composting due to the recent livestock excretion law enforcement, and the occurrence of unexpected fertilizers in vegetable and paddy fields Can be greatly disturbed, leading to yields and the development of pests. In particular, compost having a chlorine concentration of 10000 ppm or more and a potassium concentration of 40000 ppm or more tends to cause high soil chlorine concentration due to germination failure or continuous use, and is avoided by farmers seeking soil improvement. The chlorine concentration is 5000 ppm or less and the potassium concentration is 20000 ppm. The following compost is desired.

  Use of compost is recommended because of environmental and energy issues, and we want to use as much compost as possible. On the other hand, the fertilizer component of compost has been demanded due to recent organic farming and soaring fertilizer, but in general compost has a poor balance with respect to the required amount of crops, especially nitrogen that is generally used in fertilizer design. When the components are satisfied, the potassium concentration becomes excessive, and the potassium concentration becomes a limiting factor for the application rate. For this reason, there has been a problem that the application of compost is avoided because it requires double labor for spraying compost and spraying chemical fertilizer to supplement nitrogen components. In addition, in the greenhouse cultivation that does not use precipitation, such as greenhouses, the salt concentration of the applied compost accumulates, causing salt problems.

  If you want to apply a larger amount of compost in anticipation of fertilizer effects, compost with a potassium concentration of 30000 ppm or less can be applied based on the nitrogen component, and organic farming can be facilitated through year-round application. A compost having a concentration of 30000 ppm or less is desired.

  The present invention has been made in view of the above circumstances, and can appropriately adjust the chlorine concentration and potassium concentration of a fertilizer to produce low chlorine and low potassium compost at low cost and efficiently. It aims at providing the manufacturing method of a fertilizer.

  Next, in the method described in the paragraph “0005”, when the water content of livestock excreta is high (for example, the water content is 80% by mass or more), 25% by mass or more of the compost produced is also used as a secondary material. In addition, compost produced by this method is produced as compost having a chlorine concentration of 10,000 ppm or more and a potassium concentration of 30000 ppm or more as described in the paragraph “0003”.

  The present invention has been made in view of the above circumstances, and by mixing a low water content, low chlorine, low potassium fertilizer as a secondary material with high water content livestock excrement, the low water content, low chlorine, low It aims at providing the manufacturing method of the fertilizer which can manufacture the fertilizer of a powerium efficiently at low cost.

  In the compost with the lump described in the paragraph “0006”, it is necessary to use a dedicated compost spreader as it is, the moisture content in the lump is high, the death of seeds in the lump is not guaranteed, etc. Therefore, compost that was as homogeneous as possible was desired. In addition, when the lump is screened, there is a problem that the amount of compost produced is reduced and the cost is increased.

  If it is a compost of 20 mm or less and has a low water content, fertilization can be performed with a granular fertilizer spreader instead of a compost spreader. Furthermore, classification, pulverization, and pulverization before heating can be expected to improve drying efficiency, and classification, pulverization, and pulverization after heating can be expected to improve these working efficiencies.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a fertilizer having a maximum particle size of 20 mm or less. Further, a fertilizer having a minimum particle size of 2 mm or more is preferable.

  When livestock waste is separated into feces and urine, chlorine and potassium are present as ions in the liquid, and most of them are contained in the urine. Moreover, when urine is mixed, it becomes livestock excrement with high water content.

  The manure separation barn in the barn facility also mainly handles manure, and urine contamination was not a problem. Rather, it is difficult to handle with feces alone, so even in a manure separation barn, mixing of urine is not allowed, and the resistance of kerbo pumps and scrapers is great, and equipment damage may occur, and composting focusing on feces and urine is performed. I did not come.

  The present invention has been made in view of the above circumstances, and a method for producing fertilizer using livestock excreta with less urine contamination, and, when urine is mixed, chlorine by active hydration and active solid-liquid separation. An object of the present invention is to provide a method for producing a fertilizer having a low potassium concentration.

  In the composting of organic waste, compost produced through a good composting process has no germination ability for the seeds contained in these organic wastes, and typhoid, Shigella, staphylococci, E. coli, roundworm ( Eggs), Cryptosporidium, etc. die. However, there are many problems surrounding compost, such as the growth of native weeds caused by compost in the feed field and the suspicion of compost in the onset of O157.

  The present invention has been made in view of the above circumstances, and in addition to promoting correct fermentation in the conventional composting process, by heating with exhaust heat, it is sanitary safe to kill plant seeds, microorganisms, and bacteria. Another object of the present invention is to provide a low-cost method for producing fertilizer.

In order to solve the above problems, the present invention provides the following fertilizer and a method for producing the same.
A first step of preparing a slurry of organic waste containing wash water used to wash the livestock excreta or livestock excreta, chlorine concentration 5000ppm or less by dehydrating the slurry, until the following potassium concentration 20000ppm A second step of removing chlorine and potassium, a third step of adjusting the moisture content of the organic waste after dehydration to 50% by mass or more and 70% by mass or less, and the moisture content after being adjusted A fourth step of fermenting the organic waste, and a fertilizer in which the fermented organic waste is heated to at least 60 ° C. or more by exhaust heat exhausted from the facility, and the moisture content is 25% by mass or less. The fifth step to be formed and the organic waste or fertilizer after fermentation are subjected to any one or more of classification, pulverization, and pulverization, and the particle size is 2 mm or more and 20 mm. The a sixth step, has, the second in the third step, the manufacturing method of the fertilizer and adjusting the water content by addition of materials produced by the plant to the organic waste is adjusted to below.

  Utilization of facilities other than livestock facilities includes a step of moving the fertilizer of the paragraph "0002" to a facility other than livestock facilities and a step of moving the fertilizer of the present invention to the source of organic waste. Features.

  In the process of manufacturing fertilizers in the paragraph “0002”, by adding materials used in facilities other than livestock facilities at facilities other than livestock facilities, or moving these materials to the organic waste generation source of the present invention. And adding a step of adjusting the water content.

The method for producing a fertilizer according to the present invention comprises an organic waste containing livestock excrement, or slurry or washing water containing the same, or an organic waste fermented with livestock excrement, having a chlorine concentration of 5000 ppm or less and a potassium concentration of 20000 ppm. for less, cow manure, the fertilizer excluding urine fraction in pig feces, if they contain urine fraction is a hydrolyzate and solid-liquid separation process of performing a release, performing hydrolysis and solid-liquid separation in chicken manure low chlorine process, comprising the more Engineering for forming a low-potassium fertilizer.

  The method further comprises a step of mixing the low water content, low chlorine, and low potassium fertilizer with the organic waste to form a fertilizer that has been subjected to moisture adjustment.

  In order to reduce the maximum particle size of the fertilizer with low water content, low chlorine, and low potassium to 20 mm or less, after heating, classification by sieving, etc., manufacture of fertilizer in which plant seeds, microorganisms, and bacteria are killed, before heating It is preferable to heat a fertilizer of 20 mm or less by crushing and crushing.

  It is preferable to heat the organic waste to at least 60 ° C. or higher by exhaust heat of the equipment to kill plant seeds, microorganisms, and bacteria. In particular, the exhaust heat temperature is preferably high humidity.

  According to the fertilizer and the method for producing a fertilizer of the present invention, when producing a fertilizer having a low water content, a heat source is generated by newly burning fossil fuel by using exhaust heat generated in factory equipment or the like. Without surplus heat energy can be used effectively. As a result, generation of greenhouse gases can be suppressed to help preserve the global environment, and fertilizer can be produced at low cost.

  Low chlorine and low potassium fertilizers promote the use of fertilizers such as soil improvement and greenhouse use. Further, since the fertilizer according to the present invention has a ratio of nitrogen component and potassium component that cannot be obtained by conventional fertilizer, promotion of organic agriculture by fertilization design based on nitrogen fertilization effect, paragraph "0002" Mixing with the described fertilizer and the like facilitates the adjustment of the fertilizer components.

  By moving (carrying) low moisture content materials used in factory facilities to the source of organic waste, or by mixing low moisture content materials with organic waste in the factory The water content of organic waste can be reduced to the cost.

  Since the moisture content of the fertilizer is 25% by mass or less, the moisture content of livestock excreta and the like having a high water content can be effectively reduced to a moisture content suitable for fermentation. Moreover, by making the maximum particle diameter of a fertilizer 20 mm or less, mixing with livestock excrement can be performed easily and a uniform mixture can be obtained.

  The low-cost, safe low chlorine, low potassium, and low water content fertilizers produced by this production method have unprecedented functions, so that differentiation of fertilizer functions and expansion of applications can be expected. In particular, because it can be expected to sell at a high price, it will be possible to invest in equipment and facilities that were previously considered impossible in terms of cost, such as water treatment, solid-liquid separation treatment, and facilitation of manure separation in barns. In addition to improving the livestock environment and selling livestock products, we can expect contributions to livestock management through the sale of fertilizers.

  According to the method for producing a fertilizer described in each of the above items, the work that requires more energy and cost than the conventional methods such as solid-liquid separation, water addition, and excretion of manure is offset by the method for manufacturing a fertilizer described in each of the above items. Can be reduced. Furthermore, once fertilizer with low water content, low chlorine, and low potassium can be produced, fermentation can proceed at low cost by using this fertilizer instead of sawdust, cereal grain, and wood waste, and further cost reduction can be expected.

It is a block diagram which shows the structure of the manufacturing method of the fertilizer in this invention. It is a flowchart which shows the manufacturing method of the fertilizer of this invention.

The best mode of the fertilizer of the present invention will be described.
The present embodiment is specifically described for better understanding of the gist of the invention, and does not limit the invention unless otherwise specified.

  In the present invention, the term “fertilizer” is defined as including compost. That is, compost is a type of fertilizer that is generally manufactured through a fermentation process, and the following notation of fertilizer includes these composts.

  The fertilizer of this invention dehydrates the slurry or washing water containing the organic waste containing livestock excrement and water, and the cake obtained by this or the fertilizer manufactured by this is discharged | emitted from an installation. By exhaust heat, it is heated to at least 60 ° C. or more, preferably 85 ° C. or more to obtain a fertilizer having a moisture content of 25% by mass or less.

  The equipment (factory) here includes cement production equipment, biomass power plant, paper mill, steel mill, waste treatment facility and livestock facility. The exhaust heat from the equipment is more preferably 100 ° C. or higher and high heat.

  The fertilizer has a chlorine degree of 5000 ppm or less, more preferably 2500 ppm or less. The potassium concentration is preferably 20000 ppm or less, more preferably the same concentration as the nitrogen concentration.

  The water content of the fertilizer of the present invention is preferably 25% by mass or less, more preferably 5% by mass or more and 15% by mass or less, and further preferably 5% by mass or more and 10% by mass or less. By mixing this low water content fertilizer with the above livestock excrement, the water content of the livestock excretion containing a large amount of water can be easily reduced, and the production of fertilizer can be made more suitable. .

  The fertilizer of the present invention preferably has a maximum particle size of 20 mm or less. By making the maximum particle size 20 mm or less, mixing with livestock excrement can be facilitated and a uniform mixture can be obtained. Furthermore, when it is going to manufacture a low chlorine and low potassium fertilizer, it is preferable that the chlorine concentration of a fertilizer is 2500 ppm or less.

Among livestock excreta, in a state where urine is not mixed as much as possible, for example, in dairy cows, the chlorine concentration of only feces is 3500 ppm, and fertilizer having a chlorine concentration of 3500 ppm or less can be easily obtained by converting the feces into fertilizer. It can be said that the same applies to the potassium concentration. For urine alone, direct fertilization and water treatment on the field can be simplified, and the cost of livestock manure treatment can be reduced.

  Since the organic waste discharged from the manure mixing facility has a chlorine transfer rate of 5000 ppm or more and a potassium concentration of 20000 ppm or more, if it is converted into fertilizer as it is, fertilizers with these high concentrations are produced. Fertilizer is applied to the solid content that has been subjected to hydration or solid-liquid separation.

Hereinafter, the manufacturing method of the fertilizer concerning the present invention is explained based on a drawing. FIG. 1 is a block diagram showing the configuration of an apparatus used in the fertilizer manufacturing method of the present invention. Moreover, FIG. 2 is a flowchart which shows the manufacturing method of the fertilizer of this invention.
In FIG. 1, 11 is a desalination facility (apparatus) for desalting organic waste contained in the above-mentioned organic waste containing livestock excretion or slurry or washing water containing the same (however, FIG. 1). Is a dehydrator), 12 is a drying facility (apparatus) for drying the desalted organic waste by using exhaust heat (however, it is displayed as a dryer in FIG. 1), and 13 is a dryer after drying. A pulverizer 15 for pulverizing and classifying organic waste, and 15 is a fermentation facility for fermenting organic waste.

  The desalination facility (dehydrator) 11 is a solid tank composed of a tank for storing the organic waste containing the livestock excrement or a slurry or washing water containing the organic waste and a screw press or the like for solid-liquid separation of the tank. And a liquid separator. The drying equipment (dryer) 12 is dried or heat-dried using exhaust heat generated in a cement kiln, a calcining furnace, a clinker cooler, a suspension preheater or the like of a cement production equipment.

  The fermentation facility 15 is a facility for drying or heat-drying the desalted organic waste using fermentation heat generated when fermenting the desalted organic waste. For example, a vertical closed fermenter, a horizontal open type A fermenter, a horizontal open type fertilizer house, etc. are used suitably.

  The pulverizer 13 has a function of classifying particles into particles having a diameter of 20 mm or less by performing any one or more of classification, pulverization, and pulverization, such as an automatic mortar, pulverizer, stamper, kneader, A roll mill or the like is preferably used.

  When producing the fertilizer of the present invention, first, livestock excrement (organic waste) containing livestock excrement such as chicken dung, cow dung and pig dung is prepared. Next, for example, water is added to the livestock excrement and mixed to form an organic waste slurry (S1). Such water addition may be performed when the water content of livestock excrement (organic waste) is low. As slurry of organic waste, for example, excrement-containing treated water obtained by washing excreta containing swine feces and urine by washing, excrement containing treated water obtained by washing excrement containing cow dung and urine by washing, Excrement-containing treated water obtained by washing chicken cages, etc. with water, livestock manure-containing slurry obtained by pouring and stirring livestock manure such as pig manure, cow manure, chicken manure into equal to or greater than 20 times the amount of water Etc. Two or more kinds of these high water content organic wastes may be mixed depending on the application. Moreover, when the water content is as high as 80% by mass or more like pig and cow manure, it is not particularly necessary to add washing water.

  Chlorine contained in livestock excreta is eluted in the water in the slurry. This slurry is put into the dehydrator 11 and dehydrated until a predetermined moisture content is obtained. Thereby, the water | moisture content which melt | dissolved chlorine and potassium is dehydrated, and low chlorine and low potassium (henceforth desalted organic waste) are obtained (S2).

  High-water content organic waste such as livestock excreta-containing treated water and food waste-containing treated water is temporarily stored in the primary tank of the desalination facility, and then injected into the primary solid-liquid separator using a liquid feed pump, etc. The organic waste with a high water content is subjected to solid-liquid separation into a cake (solid content) and a primary slurry (aqueous solution). Next, the primary slurry generated by the solid-liquid separation is put into an adjustment tank and stored, and the primary slurry is introduced into the primary aeration tank through a quantitative supply device such as a measurement tank of the adjustment tank. The primary slurry is subjected to primary aeration treatment.

  Next, the slurry subjected to the primary aeration treatment is put into a secondary solid-liquid separator using a liquid feed pump or the like, and the slurry is separated into a cake (solid content) and a secondary slurry (aqueous solution), The secondary slurry generated by this solid-liquid separation is put into a secondary aeration tank and subjected to secondary aeration treatment. Next, the slurry subjected to the secondary aeration treatment is put into a membrane immersion tank and subjected to a membrane immersion treatment, and separated into sludge and treated water. Next, this sludge is introduced into a dehydration treatment apparatus, subjected to a dehydration treatment, and further a cake (excess sludge) is obtained.

  Thereby, the high water content organic waste is effectively desalted by the series of solid-liquid separation, and the cake-like desalted organic waste having a water content of 90% by mass or less, preferably 80% by mass or less. It becomes a thing. The treated water discharged from the membrane immersing tank and the dehydrating apparatus is once stored in the treated water receiving tank and then discharged.

  The desalted organic waste obtained through such a dehydrator 11, that is, a desalination facility, has, for example, a moisture content of 90% by mass or less and a residual chlorine concentration of 5000 ppm or less.

  Next, the fertilizer obtained by the present invention (low chlorine, low potassium (chlorine concentration is 5000 ppm or less, potassium concentration is 20000 ppm or less)) is added to the desalted organic waste, and the water content is 50 mass% to After adjusting to 70% by mass, it is dried by heat of fermentation, for example, the water content is 50% by mass or less.

  Further, this is put into the dryer 12 and, for example, the desalted organic waste is heated to at least 60 ° C. or more, preferably 80 ° C. or more by the exhaust heat discharged from the cement production facility, and moisture is supplied to a predetermined moisture content. Evaporate. Exhaust heat that is the heat source of the dryer 12 is the process of manufacturing, processing, power generation, etc. in facilities (factories), power plants, recycling facilities, etc. in various manufacturing industries, in addition to the waste heat generated in the cement kiln of the cement manufacturing facility Can be used as a heat source for the dryer 12. Specific examples include exhaust heat discharged from a biomass power plant, a paper mill, a steel mill, a waste treatment facility, and the like.

  The desalted organic waste dried by the dryer 12 as described above has a moisture content of 25% by mass or less. The maximum particle size is 20 mm or less, the chlorine concentration is 5000 ppm, and the potassium concentration is 20000 ppm or less.

  In addition, when using a cement manufacturing facility as a generation source of exhaust heat, it is also preferable to promote reduction (drying) of moisture content by mixing materials generated in the cement manufacturing facility, such as lime, with organic waste. By mixing, for example, lime having a water content of 5 to 15% by mass generated in such a cement production facility, not only can the reduction of the water content be promoted, but also organic waste can be disinfected and sterilized. It is also preferable to mix various materials having a low water content generated in other facilities (factories).

  Fermentation fertilizer is obtained by mixing the fertilizer having a low water content thus produced with, for example, livestock excretion having a high water content (for example, a water content of 80% by mass or more). Livestock excrement including livestock excrement such as chicken excrement, cattle excrement, and pig excrement and fertilizer having a low water content are introduced into a mixer, for example, and mixed (S5). Thereby, for example, the moisture content of livestock excreta having a moisture content of 80% by mass or more is reduced to 50 to 70% by mass.

  Next, the livestock excrement mixed with the low moisture content fertilizer to reduce the moisture content is put into the fermentation facility 16 and subjected to aerobic fermentation (S6). At the time of such fermentation, fermentation is effectively accelerated | stimulated by using the livestock excrement which reduced the moisture content to 50-70 mass%. A fertilizer is formed through the above steps (S7).

  As described above, according to the method of manufacturing a fertilizer of the present invention, in a drying process for obtaining a low water content fertilizer that adjusts the water content of organic waste including livestock excrement, for example, a cement manufacturing process, etc. By using exhaust heat generated in various facilities (factories), surplus heat energy can be effectively utilized without newly burning fossil fuel and generating a heat source. As a result, generation of greenhouse gases can be suppressed to help preserve the global environment, and fertilizer can be produced at low cost.

In addition, by reducing the moisture content of the fertilizer with low moisture content that adjusts the moisture content of organic waste to 5% by mass or more and 25% by mass or less, the moisture content of livestock excreta with high moisture content can be effectively reduced. It is possible to achieve a moisture content suitable for fertilizer fermentation.
Furthermore, by making the maximum particle diameter 20 mm or less, mixing with livestock excrement can be facilitated and a uniform mixture can be obtained. And the chlorine concentration in a fertilizer can be reduced and the optimal density | concentration as a fertilizer can be maintained by making the chlorine concentration of a fertilizer 5000 ppm or less and potassium concentration 20000 ppm or less.

  In addition, materials generated in various facilities, for example, materials generated in cement manufacturing facilities, such as lime, or manufactured low water content fertilizers, a source of organic waste such as a farm, ranch, It is preferable to move (carry) the chicken to the poultry farm and to move (carry) the organic waste generated at the organic waste generation source to the various facilities when the movement returns.

  Establishing a cycle in which materials and low-moisture fertilizers are transported to the source of organic waste as outbound transport, and organic waste is transported to various facilities as transport on the return path, reducing transportation costs. In addition, it is possible to stably operate as a series of cycles from the collection of organic wastes to the production of fertilizers with a low water content and the provision of fertilizers whose water content is adjusted by the use of fertilizers with a low water content.

EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention concretely, this invention is not limited by these Examples.
Example 1
Pig manure with a water content of 80% by mass was transported to a cement factory and dried with a rotary dryer using the 300 ° C. kiln exhaust heat of the cement factory as a heat source to obtain a dry fertilizer with a water content of 15% by mass. This was classified and crushed to obtain a low water content fertilizer having an average particle size of 5 mm and a maximum particle size of 20 mm.

(Example 2)
Fermented cow dung having a moisture content of 50% by mass was dried with a rotary dryer using 300 ° C. kiln exhaust heat from a cement factory as a heat source to obtain a dried fermented cow dung having a moisture content of 10% by mass. This was classified and crushed to obtain a low water content fertilizer having an average particle size of 3 mm and a maximum particle size of 20 mm.

(Example 3)
The pig manure slurry pumped up from the raw water tank was dehydrated with a dehydrator in a pig farm having a purification facility to obtain a dehydrated cake having a water content of 80% by weight, a chlorine concentration of 2000 ppm, and a potassium concentration of 10,000 ppm. The dehydrated cake was dried with a rotary dryer using 300 ° C. kiln exhaust heat from a cement factory as a heat source to obtain a dry fertilizer having a water content of 15 mass%, a chlorine concentration of 2000 ppm, and a potassium concentration of 10,000 ppm. This was classified and crushed to obtain a low water content fertilizer having an average particle size of 5 mm and a maximum particle size of 20 mm.

Example 4
The pig manure slurry pumped from the raw water tank is dehydrated with a dehydrator at a pig farm with a purification facility to obtain a dehydrated cake with a water content of 80 mass%, a chlorine concentration of 1500 ppm, and a potassium concentration of 8000 ppm. Fertilizer was fertilized in a type fertilizer house to produce a fertilizer with a water content of 40% by weight, a chlorine temperature of 1500 ppm, and a potassium concentration of 8000 ppm. The dehydrated cake was dried with a rotary dryer using 300 ° C. kiln exhaust heat from a cement factory as a heat source to obtain a dried product having a water content of 10 mass%, a chlorine concentration of 1500 ppm, and a potassium concentration of 8000 ppm. This was classified and crushed to obtain a low water content fertilizer having an average particle size of 2 mm and a maximum particle size of 20 mm.

(Example 5)
A fertilizer with a moisture content of 5 mass%, a chlorine concentration of 2500 ppm, and a potassium concentration of 10000 ppm was added at a rate of 44 kg to 100 kg of pig feces having a moisture content of 80 mass%, a chlorine concentration of 5000 ppm, and a potassium concentration of 20000 ppm. Adjusted. This was fertilized in an open linear fertilizer house. As a result, a high-quality fertilizer having a chlorine concentration of 3300 ppm and a potassium concentration of 13600 ppm was obtained.

(Comparative Example 1)
When 100 kg of pig feces having a water content of 80% by mass, a chlorine concentration of 10000 ppm, and a potassium concentration of 40000 ppm was dried in an open linear fertilizer house, a high chlorine and high potassium concentration fertilizer having a chlorine concentration of 10000 ppm and a potassium concentration of 40000 ppm was obtained.

(Comparative Example 2)
Pig manure with a moisture content of 80% by mass was dried with a rotary dryer by burning fossil fuel to obtain a dry fertilizer with a moisture content of 45% by mass. This was classified and pulverized to try to adjust the particle size, but the water content was high, and because of the wet state, good adjustment could not be made.

(Example 6)
A material with a moisture content of 5 to 15% by mass generated at a cement factory, etc. is loaded on a transport vehicle that was previously empty for picking up organic waste and transported to a pig farm where organic waste is generated. did. And by mixing or fertilizing materials with swine manure having a moisture content of 80% by mass produced in this pig farm, a good fertilizer having a moisture content of 20% by mass, a chlorine concentration of 2000 ppm, and a potassium concentration of 10,000 ppm was obtained.

(Example 7)
When feces having a chlorine concentration of 5000 ppm were converted to fertilizer as they were, a low chlorine fertilizer having a chlorine transfer rate of 5000 ppm could be produced. In addition, when a fertilizer having a low water content that has already been manufactured and a fertilizer of 5% by mass or more and 25% by mass or less is used as a moisture adjusting agent, without using a hard-to-decompose adjusting material such as sawdust, cereal, and wood waste, Moreover, a low water content fertilizer made of a single material could be produced.

(Example 8)
Manufactured fertilizer with a low water content is 25% by mass or less, so there is little odor generation. Especially when drying using high-temperature factory exhaust heat, the volatile components that generate odor are products with dry air of 100 ° C or higher. Since the temperature was reliably raised to 60 ° C. or higher, a fertilizer with less odor was obtained.

Example 9
In airflow drying for about 2 seconds using factory exhaust heat of 180 ° C., the product temperature rose to 80 ° C., and 35% by mass of fertilizer could be dried to 22% by mass or less. By this drying, a fertilizer with less odor was obtained. Furthermore, this method also confirmed the death of weed seeds contained in the imported feed. Furthermore, since environmentally hazardous substances such as herbicides such as atrazine are also volatile, reduction of these substances can be expected.

(Example 10)
In airflow drying using factory exhaust heat, it is possible to reliably convey the optimal particle size of 20 mm or less and airflow temperature from the fertilizer surface to the inside by pulverizing with a basket-type pulverizer before introducing the fertilizer. Moreover, the fertilizer of 2-20 mm particle size except the particle size of 2 mm or less with a bag filter etc. was obtained. In general, this fertilizer tends to generate dust and becomes difficult to handle as drying progresses, whereas it is a fertilizer having an optimal particle size, and the generation of dust is small, and it is easy to spread and mix the fertilizer. Further, fertilizers of 2 mm or less have an optimum particle size as fuel in the factory, and if this method was used, the factory equipment could be used at low cost.

(Example 11)
Fertilizer with low water content using factory waste heat also kills bacteria that cause food poisoning such as coliforms and Salmonella and fertilizer bacteria. Fertilizer with high added value such as adding useful bacteria such as EM bacteria to this fertilizer was gotten.

(Example 12)
Without using factory waste heat, low-chlorine fertilizer was burned on the farm to dry the low-chlorine fertilizer. When the combustion heat was used in a vertical component, a fertilizer having a moisture content of 35% by mass could be dried at a low cost and a short period of time to a moisture content of 25% by mass. Moreover, less damage by chlorine of the combustion furnace, since the combustion ash chlorine concentration is low, could be effectively utilized than conventional combustion ash as a fertilizer.

11 Dehydrator, 12 dryer, 13 grinder, 16 Fermentation equipment.

Claims (3)

A first step of producing a slurry of organic waste containing cleaning water used for cleaning livestock waste or livestock waste;
A second step of removing chlorine and potassium until the chlorine concentration is 5000 ppm or less and the potassium concentration is 20000 ppm or less by dehydrating the slurry;
A third step of adjusting the moisture content of the organic waste after dehydration to 50% by mass or more and 70% by mass or less;
A fourth step of fermenting the organic waste after the moisture content has been adjusted;
A fifth step of forming the fertilizer in which the fermented organic waste is heated to at least 60 ° C. or more by exhaust heat discharged from the facility, and the moisture content thereof is 25% by mass or less;
A sixth step of performing any one or more of classification, pulverization, and crushing on the organic waste or the fertilizer after fermentation, and adjusting the particle size to a particle diameter of 2 mm or more and 20 mm or less;
Have
In the third step, a method for producing a fertilizer is characterized in that a material generated in the facility is added to the organic waste to adjust moisture. The method for producing a fertilizer according to claim 1 , wherein the facility is a cement manufacturing facility, and the material is lime. A fertilizer manufactured by the method for manufacturing a fertilizer according to claim 1 or 2 .

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