JP3429051B2 - Horizontal stirring fermenter - Google Patents

Description

Detailed Description of the Invention

[0001]

[Field of Industrial Use] The present invention aerobically and rapidly ferments organic wastes such as food waste, livestock manure, agricultural, forestry and fisheries industry and food processing industry wastes, sludge, etc. to obtain soil improvers and organic fertilizers. The present invention relates to a fermentation device for collecting, reducing or sanitizing.

[0002]

2. Description of the Related Art Conventionally, various types of horizontal drum mechanical stirring type fermentation devices have been proposed and put into practical use for the purpose of speeding up, increasing efficiency, and improving quality. Generally, the above apparatus has a stirring structure in which a shaft equipped with paddle type, ribbon type, rod-shaped blades, etc. is rotated in a horizontal cylindrical fermenter drum, and one end of the fermenter drum is internally fed. The organic waste is supplied and stored as the processing material in the above, and the fermentation processing is performed while moving and discharging the processing material to the other end by the stirring structure. At this time, a method is often adopted in which air is supplied from the bottom of the drum through a dispersion pipe or the like into the fermentation tank drum, and the fermentation treatment is performed while mixing the air and the treatment material. The air used for the fermentation process is discharged as exhaust gas from the upper part of the fermentation tank drum.

[0003] In the above apparatus, the processing materials are usually handled by a batch system in which the entire raw material contained in the fermenter drum is uniformly stirred and mixed, or the processing materials are supplied from one end of the drum to perform mixed fermentation. It is carried out by a semi-continuous method of moving to the other end while processing and processing. Further, in order to maintain the temperature of the treated material and to cope with the water content, a method of heating the supply air or indirectly heating with steam or the like through the outer wall of the fermentation tank drum main body is applied. In addition, as a new method, basically two or more horizontal mechanical stirring type fermentation tanks of the batch method described above are connected, and the processing material is transferred from the supply side tank to the discharge side tank via a conveyor. An apparatus has been proposed in which the fermenting process is performed by sequentially moving the raw material toward the supply side air from the discharge side tank of the raw material to the supply side tank (see Japanese Patent Laid-Open No. HEI-1). -145388).

[0004]

In the conventional apparatus as described above, there is an example in which the treated material is adjusted to a water content suitable for fermentation and the fermentation treatment is carried out at a high speed in a short period of 2 to 3 days. In this case, expensive and special fermentative bacteria are used, and
Fermentation is performed by forcibly raising the temperature of the treatment material by heating air or indirect heating from outside the fermentation tank. In this method, as the compost after the treatment, the decomposition rate of organic substances is low, and in many cases, the maturity is insufficient, and in practice, the treatment is similar to the drying treatment. In addition, in a general method that does not apply a special fermentative bacterium and a heating method, there is a delay in temperature rise, and in the initial stage, aerobic fermentation is not sufficiently performed, and acid fermentation by low temperature bacteria is likely to occur. It has a slow start-up and tends to generate a bad odor. Especially when it is carried in, like the processing materials such as garbage
When the value is lowered to 4 to 5, the pH value is further lowered, and the delay in the start-up of fermentation becomes significant. Therefore, it is difficult to perform high-speed fermentation treatment, and after this fermentation treatment, further fermentation treatment is required, and finally, the treatment for 20 days or more is required to complete the primary fermentation (fermentation progress rate of about 40%). It takes a period.

The following points can be considered as the causes of insufficient aerobic fermentation as described above. Conventionally, inside the fermenter (drum), the material is present in the lower part and the air for aeration is divided into the upper space. Therefore, the material and air are agitated and mixed by a mechanical agitator to bring them into contact with each other, thereby aerobic microorganism However, it is usually a very gentle stirring and mixing operation (several rpm), and the aeration rate is 500 l / min.t at the maximum. ), It is difficult to perform uniform and sufficient aeration treatment. Further, in this case, it is physically possible to perform a powerful mixing operation by increasing the rotation speed of the stirrer in order to improve the contact efficiency between the treatment material and air, but the power cost for stirring is reduced. It has the disadvantages of high cost and poor economic efficiency. Also, when ventilating from the bottom of the fermenter drum through an air diffuser, etc.,
It is also a factor that uniform ventilation is not possible because it is frequently clogged by the material and a drift occurs frequently.
The present invention has been made in the background of the above circumstances,
It is an object of the present invention to provide a horizontal stirring type fermenter that enables high-speed fermentation treatment by actively contacting a treatment material with oxygen to promote aerobic fermentation.

[0006]

In order to solve the above-mentioned problems, a horizontal stirring-type fermenting apparatus of the present invention is a horizontal stirring-type fermenting apparatus in which at least a lower portion of a drum has a circular cross section as a fermenter. , Partitioned by a plurality of partition plates that intersect the axial direction and have a predetermined distance from each other in the axial direction, and these partition plates are composed of first partition plates and second partition plates that are alternately arranged. The first partition plate blocks the inner space of the drum except for the ventilation passage secured in the lower part, and the second partition plate excludes the inner space of the drum except the ventilation passage secured in the upper part. Ri Contact by blocking, and openable opening is provided on at least a portion of the front Symbol partition plate,
It is characterized in that this opening serves as a passage for a treatment material composed of organic waste . The opening that can be opened and closed is usually provided above the partition plate. In addition, in the second partition plate, the ventilation passage opened at the top can be used as the passage of the processing material, and in the first partition plate, the opening provided in at least a part of the opening and closing can be used as the passage of the processing material.

Further, in the above-mentioned fermentation apparatus, an air supply port to which air is supplied and an exhaust port from which exhaust gas in the fermentation tank is discharged are formed in the fermentation tank, and the exhaust port is provided with exhaust gas for exhaust gas. A reflux device for refluxing a part or the whole of the fermenter is connected.

The partition plate of the present invention may be any partition plate in which the first partition plate and the second partition plate are alternately arranged, and the number thereof is not particularly limited. Further, although the intervals between the partition plates are usually arranged at equal intervals, the intervals are not limited to equal intervals, and the intervals can be appropriately changed as necessary. For example, in consideration of the capacity of the partitioning chamber for the processing amount for 3 to 7 days and the mobility according to the quality of the treated material and the fermentation period, B / D = 0 with the interval B and the drum diameter D. Select the interval so that it is 0.5-2. The partition plate is usually arranged so as to be orthogonal to the axis of the drum, but it is also possible to arrange a part or all of the partition plate at an angle, if desired.
It is also possible to change the inclination angle by the partition plate.

The air passage secured in the partition plate is such that the upper part of the second partition plate is an open part or a large number of vent holes and slits are formed in a part of the lower part of the first partition plate. Obtained by In the present invention, the structure of the ventilation passage is not particularly limited, and it is also possible to form a part of the partition plate with a material having air permeability. In addition, the second partition plate may be provided with a vent hole that can be opened and closed, in addition to opening the upper part to form a ventilation path. Further, when the processing material is passed over the upper opening of the partition plate, in consideration of the change in the volume of the processing material, the partitioning is performed as the processing material moves smoothly toward the discharge port side. It is desirable to gradually reduce the height of the plate. For example, in the case of a truncated circular shape with the upper portion missing, in terms of the lacking rate (area), the charging side is gradually adjusted to a low rate of 20 → 50%.

When it is desired to retain the processing material in the partitioned space for a predetermined time and selectively move the processing material, the partition plate has a shape in which the entire partition plate blocks the entire space of the drum. However, when the processing material is allowed to pass through, an opening / closing opening provided in a part of the partition plate is opened as a passage. Further, in the second partition plate whose upper portion is always open, it is possible to selectively move the processing material by changing the driving condition of the driving device (for example, increasing the rotation speed). Further, even with the partition plate that can be opened and closed as described above, it is possible to utilize the change of the driving condition of the driving device. The recirculation device may be directly connected to the air supply port or a separately provided exhaust gas air supply port via a valve, or may be connected to an air supply device for the air supply port. In the air device, fresh air and exhaust gas can be appropriately mixed, or both can be appropriately selected and supplied to the air supply port. The air supply port is preferably provided on the processing material discharge side of the drum, and the exhaust port is preferably provided on the processing material input port side.

[0011]

In other words, according to the present invention, as shown in the schematic view of FIG. 5, the first partition plate 41 and the second partition plate 42 are alternately arranged on the drum 40, so that the air flows in the upper space. Without passing short-circuiting, the treatment material 43 meanders up and down and always passes through the treatment material 43 in a stirring state, so that the air and the treatment material 43 are actively contacted with each other, and the fermentation efficiency is significantly improved. When the processing material 43 moves, the first partition plate 41
Passes through an opening / closing opening provided in the upper part of the second partition plate 42 and further overflows and passes over the upper part of the second partition plate 42.

Moreover, if exhaust gas is used in the present invention,
The air heated by the heat generated by fermentation heats the treated material. Therefore, the heat energy of the fermentation gas can be effectively used to accelerate the temperature rise of the processing material. Also, due to the heat of fermentation, evaporation of water in the material,
Although it is volatilized, it also has the effect of improving the evaporation rate because the heat transfer between the material and air and the evaporation diffusion efficiency are increased. Furthermore, in the fermentation process of food waste, in the latter half, 1
Ammonia gas is generated at about 0 to 100 ppm,
When exhaust gas is used as described above, exhaust gas containing ammonia gas is introduced into the fermenter. When the processing material near the charging and supplying part comes into contact with this exhaust gas, it absorbs part of the ammonia gas that is alkaline
Therefore, as described above, it is possible to suppress the decrease in the initial pH value which hinders the high-speed fermentation process. In the use of exhaust gas, if the treated material and the air containing the exhaust gas are brought into countercurrent contact, the air supplied from the discharge side of the material is added by heat exchange with the material in the fermentation temperature raising section. Warmed,
Since the processing material at room temperature near the charging portion is heated, the temperature of the processing material can be raised more efficiently.

It has been empirically known that the heat transfer efficiency in contacting air with a solid material of this kind increases at a certain rate depending on the flow velocity of the air in contact with it. , In the conventional high-speed fermentation process of mixing only several revolutions / minute by mechanical agitation, the air flow caused by the entrainment of the air due to the mixing of the materials is a slow speed that is close to the natural convection phenomenon, and therefore the heat transfer rate should be improved. It is difficult. In the method of the present invention, in addition to mechanical stirring of such materials, the required air amount for fermentation or the circulation of exhaust gas is used to obtain an air flow rate several times as high as the conventional fermentation air flow. An airflow of several tens of mm / sec is forcibly generated, which increases the heat transfer rate. Also, properly adjusted water content 60-65%
In the fermentation treatment of treated materials such as food waste, a large amount of fermentation decomposition heat is generated, so in the latter half of the fermentation treatment, the temperature may be adjusted by sprinkling treatment or the like to avoid excessive high temperature, This method has the effect of reducing the temperature of the processing material itself by adding normal temperature air and ventilating the exhaust gas of which the temperature has decreased to the processing material, so that this measure can be mitigated.

Further, according to the present invention, since the processing material sequentially moves through the partition plate, semi-continuous operation is possible instead of the batch type. For example, for a partition plate having an opening on the upper side, the processing material overflows through the partition plate and moves, but this is a ribbon type with a transfer function for material deposited below the height of the partition plate. , Paddle type, screw type, etc. by using a stirrer with built-in stirring blades. Further, in the case of moving by overflow as described above, it is possible to stably move the material by gradually lowering the height of the partition plate or increasing the rotation speed of the stirrer from the input side toward the discharge side. further,
It is also possible to rotate the stirring device in the opposite direction in order to perform more stable mixing and stirring of the material and transfer.

[0015]

EXAMPLE 1 Next, an apparatus for directly aerating fermentation air will be described as an example of the present invention with reference to FIGS. 1 to 3.
The fermenter drum 1 having a circular cross section is heat-insulated on the outer peripheral wall in order to prevent heat radiation. On the left side of the fermenter drum 1 in the drawing, an inlet 1a for the processing material and an exhaust port 3 are also shown. A treatment material discharge portion 1b and an air supply port 2 are provided on the right side. Inside the fermenter drum 1, first partition plates 4 and second partition plates 5 are alternately arranged at predetermined intervals from the input side wall to divide into six chambers. Further, in the fermenter drum 1, a drive shaft 6b is arranged so that ribbon-shaped stirring blades 6a ... 6a are located in each chamber, and the drive shaft 6b is connected to an external drive device 6c, Further, each room is provided with a sprinkler 7 ... 7 that can operate independently. It is desirable that the sprinkler 7 be sprayed.

As shown in FIG. 2, the partition plate 4 has a substantially circular shape as a whole to block the space inside the fermenter drum 1. It is composed of a circular fixed plate 4b and a rectangular movable plate 4c between the fixed plates 4b and 4b. The holes of the perforated plate 4a have a size of a few mm, which does not allow the processing material to easily pass through. The movable plate 4c is vertically movable by a power cylinder 8 arranged and fixed on the fermentation tank drum 1. The perforated plates 4a ... 4a are gradually reduced in height as they are closer to the discharge port side. When this is represented by a circle loss rate (ratio of reduction of area with respect to circle), it is 30%, 35%, It is 40%, and the areas of the fixed plate 4b and the movable plate 4c are changed correspondingly. Further, as shown in FIG. 3, the partition plate 5 is a holeless plate having the same outer shape as that of the perforated plate 4a, the upper space of the partition plate 5 is open, and the circularity is also the movable plate 4c. Similarly, it gradually increases toward the outlet side. Although the upper part of the partition plate 5 is left open in this embodiment, it is also possible to dispose an openable / closable porous movable plate 5a on the upper part as shown in FIG. The fermenter drum 1'of FIG. 4 is a modification in which the upper portion has a quadrangular cross section.

Further, as shown in FIG. 1, an air blower 12 is connected to the air supply port 2 through an adjusting valve 10 and a flow meter 11 by an air supply line 13. An exhaust blower 15 is connected to the exhaust port 3 via an exhaust line 14, and the exhaust blower 15 is connected to a deodorizing device 16. Further, the processing material crushing and supplying device 17, the processing material adjusting device 18, and the conveyor 19 are connected in series, and the processing material carry-out section of the conveyor 19 faces the charging section 1a. On the other hand, a conveyor 20 is connected to the discharge section 1b, and the carry-out section of the conveyor 20 faces the product storage tank 21. The product storage tank 21 is provided with a switching valve 21a at the discharge portion.
In addition to carrying out the processed material as a product by switching
A portion is optionally returned to the process material conditioner 18 via conveyor 22 for mixing with fresh process material.

Next, the operation of the above apparatus will be described. Raw raw garbage (water content 70%) is crushed into a particle size of several mm to several tens of mm by the crushing supply device 17, quantitatively sent to the processing material adjusting device 18, and quantitatively returned via the conveyor 22. The fermented material is mixed with a part of the fermented material (moisture content of about 40%), homogenized and adjusted for moisture content (65%), and sent to the fermenter drum 1 from the charging unit 1a by the conveyor 19. Each partition chamber in the fermentation drum 1 accommodates and processes about one day's worth of material. The charging unit 1a is provided with a valve, which is closed after charging the necessary processing material, and the processing material in the fermenter drum 1 is stirred by the stirring blades 6a. If necessary, the sprinkler 7 ... At 7, the treated material is watered (preferably sprayed). Watering can be performed in each partition room. Also, the adjustment valve 1 on the air supply side
0, fresh air is supplied to the air supply port 2 while observing and adjusting the flow rate with the flow meter 11. The air vibrates up and down repeatedly through the treatment material, the lower part of the partition plate 4 (perforated plate 4a), the treatment material, and the upper part (open part) of the partition plate 5, while actively contacting the mixed and stirred process material. And promote fermentation. The air that has passed through the fermenter drum 1 is finally discharged from the exhaust port 3 and is deodorized by the deodorizing device 16 through the exhaust line 14 while being sucked by the exhaust blower 15.
It is discharged to the outside. After performing this aeration and mixing and stirring operation for a predetermined time, the following operation is performed in the following procedure.

(1) The discharge part 1b is opened. (2) The processing material is discharged from the final partition chamber through the discharging portion 1b. (3) After the above discharge is completed, the discharge part 1b is closed. (4) The movable plate 4c of each partition plate 4 is lifted to open the partition plate 4. (5) The rotation speed of the drive shaft 6b is increased to rotate the stirring blades 6a ... 6a at high speed. (6) The rotation speed of the drive shaft 6b is returned to the rotation speed of the normal operation at the time when the processing material moves from each partition room to the downstream partition room. (7) The charging unit 1a is opened, new processing material is charged into the first partition chamber, and then closed.

In the above operation, in order to reliably transfer the processing material from each partition chamber to the downstream partition chamber (to prevent a short path of the material), the partition plate 5 is opened and closed at the upper portion as shown in FIG. It is desirable to provide a possible porous movable plate 5a. After the above procedure (4), only one movable plate 4 connected to the final partition chamber is opened, the stirring blades 6a ... 6a are rotated at high speed to move the processing material to only the final partition chamber, and then the movable plate is moved. 4c is closed, and only the porous movable plate 5a of the partition plate 5 on the upstream side is opened to move the processing material. After that, sequentially from the discharge side to the input side for each partition room,
Move the processing material. By repeating the above operation, the fermentation treatment of the treated material can be performed semi-continuously. By this treatment operation, the treated material is subjected to fermentation treatment (primary fermentation) and discharged in a short period of about 10 days on average.
The processed material fermented in this manner is discharged through the conveyor 20 and stored in the product storage tank 21, and a part thereof is quantitatively processed through the switching valve 21a.
Returned to No. 8 and used as a conditioning material for the processing material. Then, a predetermined amount is carried out and used as product compost. The obtained product compost had a good degree of fermentation and was excellent in quality.

(Example 2) Next, as air for fermentation,
An embodiment in which fermentation gas, that is, exhaust gas is circulated and used will be described with reference to FIG. In this embodiment, the same components as those in the first embodiment are designated by the same reference numerals,
Omit or simplify the description. The fermenter drum 30 of this apparatus is partitioned into four chambers by partition plates 4, 5, 4 and other configurations are the same as those of the fermenter drum 1 of the first embodiment. In this device, the exhaust port 3 and the deodorizing device 16 are connected by an exhaust line 31, an exhaust adjusting valve 32 is provided in the middle of the exhaust line 31, and an upstream side of the exhaust adjusting valve 32 is provided. A circulation blower 33 is connected to branch from the exhaust line 31. In the circulation blower 33, the flow rate is controlled by the flow rate control device 34, and the circulation blower 3
The output side of 3 is connected to the air supply port 2 by the exhaust supply line 35 together with the air supply line 13. The exhaust line 31, the exhaust control valve 32, the circulation blower 33, the flow rate control device 34, and the exhaust supply line 35 described above constitute a circulation device.

In this apparatus, for ventilation operation, exhaust gas is reused while replenishing the required fermentation air, and the gas flow rate is up to several times the required air amount. Supply into the drum 30. On the other hand, the exhaust gas discharged from the fermentation tank drum 30 is distributed and supplied in a predetermined amount while the pressure of the circulating gas system is controlled to a predetermined value by the exhaust control valve 32, and the rest is deodorized through the exhaust blower 15. It Most of the exhaust gas is circulated and used after being flow-controlled via the circulation blower 33. The flow rate of the required fermentation air is set via the air blower 12, and the air is supplied from the air supply line 13 to the exhaust gas supply line 35. In addition, in order to more effectively evaporate the water in the fermentation process, it is also possible to apply a method of providing a cooler in the exhaust supply line 35 to cool and dehumidify the gas.

The mixing, stirring, and moving of the processing materials in the second embodiment are the same as in the first embodiment. In addition, the treated material is quickly heated to a suitable temperature by circulation of exhaust gas heated in fermentation, and the pH is raised by ammonia contained in the exhaust gas to be adjusted to a pH suitable for fermentation. Fermentation can be carried out at an extremely high speed as compared with Example 1 and is superior to Example 1. Typical fermentation forms (temperature, P
H) is shown in FIG. Both the temperature of the treated material and the pH of the treated material have risen early to shift to conditions suitable for fermentation. Further, it has been clarified that even when fresh air is introduced, it is efficiently heated and has a sufficiently high temperature on the discharge side, and can be sufficiently reused by being circulated.

(Embodiment 3) FIG. 8 shows a multi-stage fermentor 50 in which the fermenter drums 1 in Embodiment 1 are stacked in multiple stages, the longitudinal directions of which are the same and the transfer directions of the treatment materials are opposite. . The fermentation tank drum 1 of at least the second stage and below has a cross-sectional shape shown in FIG. 4, and the movable plate 4c and the porous movable plate 5a are pushed and pulled horizontally to open and close the apparatus. It is possible to reduce the height. Further, the number of stages is not limited to two as shown in FIG. 8, and three or more stages may be stacked. Further, the multi-stage fermentor of this embodiment can be opened and closed by facing the discharge part of the upper fermenter drum 1 and the input part of the lower fermenter drum, so that the treated materials processed in the upper stage are sequentially transferred to the lower stage. Be transferred. In this embodiment, the air supply and exhaust are performed individually in each stage, but it is also possible to connect the respective stages in a ventilation manner so that the air supply and exhaust can continue from the lower stage to the upper stage. According to this multi-stage apparatus, the processing capacity is increased, and if the capacity of each chamber is reduced, continuous processing is further facilitated.

[0025]

As described above, according to the present invention,
Since the treated material and air are in active and reliable contact with each other, the oxygen required for aerobic microbial fermentation can be uniformly and appropriately performed, and the fermentation efficiency is greatly improved, enabling high-speed fermentation treatment. Then, the fermentation treatment also increases the decomposition rate of organic substances, and it becomes possible to stably obtain good treated products. In addition, since the treated materials are sequentially moved from the raw material input to the discharge in the partition chamber in the fermenter while being subjected to the retention fermentation treatment, continuous treatment can be performed as a semi-continuous fermentation apparatus.

Further, if exhaust gas is circulated and used as the fermentation air, the amount of ventilation is equivalent to several times that of the conventional one, and the air passes through the treatment material while being forcibly stirred and mixed, so that the treatment material and air come into contact with each other. It is made more efficient, and the fermentation efficiency is further improved. Further, the heat of heat transfer to the exhaust gas to automatically recover the heat of fermentation decomposition, the temperature of the treated material is rapidly raised by heating, and the fermentation efficiency is further improved. Further, since it is possible to eliminate the need for preheating which has been conventionally performed for air supply, energy efficiency is improved. Furthermore, since the exhaust gas containing ammonia gas generated in the fermentation process comes into contact with the treatment material, it is possible to maintain the pH value of the treatment material in the vicinity of neutral without lowering the pH value of the treatment material in the initial stage after the treatment material is charged. It can be hastened. Further, if the treatment material and the air are brought into contact with each other in a countercurrent manner, the treatment material and the air are more reliably contacted with each other, and the above effect is increased. In particular, the temperature of the material on the input side can be raised early, which has the effect of accelerating the start-up of fermentation. As a result, the number of days required to complete the primary fermentation is 10 to 1
It can be shortened to 4 days. Furthermore, the degree of odor generated can be reduced by promoting aerobic fermentation and using the generated ammonia gas and suppressing volatilization.

[Brief description of drawings]

FIG. 1 is a schematic plan view showing an apparatus according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a drum showing the vicinity of a first partition plate.

FIG. 3 is a longitudinal sectional view of the drum showing the vicinity of a second partition plate.

FIG. 4 is a vertical cross-sectional view of a drum showing a modification of the second partition plate.

FIG. 5 is a schematic view of an apparatus for explaining the operation of the present invention.

FIG. 6 is a schematic plan view of another embodiment.

FIG. 7 is a graph showing fermentation forms of the example of FIG.

FIG. 8 is a schematic front view showing a multistage device of still another embodiment.

[Explanation of symbols]

1 Fermenter drum 1a Input part 1b
Exhaust unit 2 Air supply port 3 Exhaust port 4
Partition plate 4a Perforated plate 4c Movable plate 5
Partition plate 6a Stirring blade 8 Power cylinder 12 Air blower 30 Fermenter drum 32
Exhaust gas control valve 33 Circulating blower 50 Multi-stage fermentation device

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI C05F 7/00 B09B 3/00 ZABD 9/02 A (56) References JP-A-5-23653 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B09B 3/00-5/00 C02F 11/00-11/20 C05F 3/00-9/04

Claims (2)

(57) [Claims] 1. A horizontal stirring fermenter in which at least a lower portion of a drum has a circular cross section as a fermentation tank, wherein the drum comprises a plurality of partition plates which intersect the axial direction and have a predetermined interval in the axial direction. These partition plates are composed of a first partition plate and a second partition plate that are alternately arranged, and the first partition plate is the inside of the drum except for the ventilation passage secured in the lower part. and block the space and the second partition plate, Ri Contact blocks the drum space with the exception of ventilation path is secured upwardly, closing at least a portion of the partition plate
There is a possible opening, which is an organic waste.
A horizontal stirring-type fermentation apparatus, which serves as a passage for a processing material composed of waste . 2. The fermenter is provided with an air supply port to which air is supplied and an exhaust port from which exhaust gas in the fermenter is discharged, and the exhaust port has a part or all of the exhaust gas. horizontal stirring type fermentation system according to claim 1, wherein the feedback device is connected for recirculating the fermenter to.