JP7083160B2 - Digestive juice processing device and its processing method in methane fermentation of organic matter - Google Patents

Description

The present invention relates to an apparatus and a method for treating a digestive juice which is a residue after fermenting an organic substance in a methane fermentation tank or the like.

Conventionally, as described in Patent Document 1, a system for recovering methane gas by methane fermentation of organic waste such as sewage sludge, urine, food waste, livestock waste, or resource crop or waste thereof. There is.

On the other hand, in order to produce methane gas more efficiently than methane fermentation and to suppress fluctuations in the amount of gas recovered, it is necessary to periodically discharge the digestive juice from the methane fermentation tank and add new organic matter. In addition, in order to discharge the digestive juice into public sewers and rivers, advanced purification treatment equipment is required, and there are various problems in disposing of the digestive juice, such as improving the sewerage. rice field.

Japanese Unexamined Patent Publication No. 2007-445779 Japanese Patent No. 4153685

The present invention has been made in consideration of the above-mentioned circumstances, and the digestive juice discharged by methane fermentation is not discharged to a public sewer or a river by using an advanced purification treatment facility. In addition, the waste produced in the final process is used as a valuable resource, and the apparatus and the treatment method thereof generate almost no waste.

The present invention constitutes means for solving the above-mentioned problems as follows. That is, the present invention is connected to a methane fermenter for fermenting organic matter, a digestive juice tank connected to the methane fermenter and storing digestive juice produced in the fermenter, and a digestive juice tank connected to the digestive juice tank. Is housed in a closed container and stirred while heating to a predetermined temperature range under reduced pressure. It is characterized by being.

According to the present invention, the digestive juice discharged by methane fermentation can be treated without an advanced purification treatment facility. Moreover, since the waste generated in the final process can be used as an organic fertilizer, almost no waste is generated.

In the present invention, the vacuum fermentation / drying apparatus is provided with at least two or more primary vacuum fermentation dryers, connected in series to the plurality of primary vacuum fermentation dryers, and has two or less primary vacuum fermentation dryers. It is preferable to have a next vacuum fermentation dryer. According to this configuration, it is possible to reduce the number of installation units of the secondary vacuum fermentation dryer, so that the installation space can be reduced and the running cost can be suppressed.

In the present invention, it is preferable to have a sorting device for removing foreign substances mixed in the secondary dried product discharged from the secondary vacuum fermentation dryer. According to this configuration, foreign substances have already been removed from the organic fertilizer produced in the final process, and this organic fertilizer can be used with confidence.

In the present invention, a main pipe connected to the digestive liquid tank, a branch pipe branched from the main pipe, a plurality of primary vacuum fermentation dryers connected to the branch pipe, and an opening / closing of the branch pipe. It is preferable to provide each valve. According to this configuration, by adjusting each of the on-off valves, the optimum amount of digestive liquid can be charged into each of the two or more primary vacuum fermentation dryers from the digestive liquid tank. Further, by closing at least one on-off valve among the above-mentioned on-off valves, the primary vacuum fermentation dryer corresponding to the on-off valve can be stopped, and the running cost when the amount of digestive juice discharged is small. Can be suppressed.

In the present invention, it is preferable to burn the methane gas generated in the methane fermentation tank for gas power generation and use a part of the heat energy for the heat source of the vacuum fermentation drying device. According to this configuration, the steam generating boiler provided in the vacuum fermentation dryer becomes unnecessary, the equipment configuration is simple, and the running cost can be suppressed.

Further, in the present invention, the methane fermentation step of an organic substance, the storage step of the digestive juice produced after the methane fermentation, and the digestive juice are housed in a closed container and stirred while being heated to a predetermined temperature range under reduced pressure. At the same time, it is a method for treating digestive juice in methane fermentation of an organic substance, which comprises a vacuum fermentation drying step of decomposing an organic component of an organic substance using microorganisms to obtain a dried product having a reduced volume. The same effect as the digestive juice processing device in methane fermentation of organic matter can be expected.

According to the device for treating digestive juice in methane fermentation of organic matter and the treatment method thereof according to the present invention, the digestive juice discharged by methane fermentation can be treated without an advanced purification treatment facility. Moreover, since the waste generated in the final process can be used as an organic fertilizer, almost no waste is generated.

It is a figure which shows the schematic structure of the processing apparatus of the digestive liquid in the methane fermentation of the organic substance which concerns on embodiment of this invention. It is a figure which shows the schematic structure of the methane fermenter of FIG. It is a figure which shows the schematic structure of the primary vacuum fermentation dryer of FIG. 1 schematically. It is a figure which shows the front of the vacuum fermentation drying apparatus of FIG. It is a figure which shows the discharge part of the secondary vacuum fermentation dryer of FIG. It is a perspective view which shows the schematic structure of the sorting apparatus of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a schematic configuration of a digestive juice processing apparatus in methane fermentation of an organic substance according to an embodiment of the present invention, FIG. 2 is a diagram showing a schematic configuration of a methane fermentation tank, and FIG. 3 is a primary vacuum fermentation drying. FIG. 4 is a diagram schematically showing the schematic configuration of the machine, and FIG. 4 is a diagram showing the front of the vacuum fermentation drying device.

As shown in FIGS. 1 and 2, 1 is a methane fermenter, and from the input port of 1a, organic waste such as sewage sludge, urine, food waste, livestock waste, or resource crop or its waste. Organic substances such as are put into the fermenter 1b and can be fermented with methane. During that time, the mixture is agitated by a plurality of rotary blades 1e, ... Attached to the rotary shaft 1d connected to the motor 1c with a speed reducer in two upper and lower stages, and methane fermentation of the organic substance is promoted to generate methane gas G. The methane gas G generated in the methane fermentation tank 1 is recovered from the gas recovery pipe 1f into the gas tank 6, and during that time, unnecessary carbon dioxide gas is removed and stored in the gas tank 6.

The methane gas G stored in the gas tank 6 is supplied as fuel for the gas power generation boiler 7, burns the methane gas G, converts the heat energy into the power energy of the turbine, and converts it into electric energy. In addition, this heat energy can be used as steam for heating a vacuum fermentation / drying device described later, and surplus electric energy can also be supplied to an electric power company.

If methane fermentation is continued in the methane fermentation tank 1, the pH concentration of the fermentation broth decreases, but if an alkaline agent is added as a pH adjuster, the pH concentration is restored and methane fermentation can be continued stably. Alkaline agents are added by repeating these steps, but the efficiency of methane gas G generation decreases after one month has passed.

Therefore, it is necessary to transfer the digestive liquid L, which is the fermentation residue in the fermenter 1b, from the discharge port 1g provided at the lower portion to the digestive liquid tank 2 via the discharge pipe 2a. Further, a transfer pump 2b and an on-off valve 2c are provided in series in the middle of the discharge pipe 2a, and the digestive liquid is digested from the methane fermentation tank 1 by driving the transfer pump 2b to open and close the on-off valve 2c. L can be transferred to the digestive juice tank 2. Further, by repeating the same procedure as described above, such as charging the organic substance again from the charging port 1a, the methane gas G can be stably and continuously supplied to the gas tank 6.

The digestive juice tank 2 is fermented in the methane fermenter tank 1 for one month, and the digestive juice L, which is the residue thereof, is stored. The digestive liquid L can be supplied from the digestive liquid tank 2 to the vacuum fermentation drying device A. In this embodiment, the vacuum fermentation / drying apparatus A is composed of three primary vacuum fermentation dryers 3 and only one secondary vacuum fermentation dryer 3'. The digestive liquid tank 2 is connected to the primary decompression fermenter / dryer 3 via a branch pipe 2e branched into three from the main pipe 2d provided at the lower portion thereof, and an open / close valve is attached to each of the split pipes 2e. 2f is provided. By adjusting the opening degree of each of the opening / closing valves 2f, an optimum amount of digestive juice L can be supplied to the primary vacuum fermentation dryer 3. In this embodiment, the digestive liquid L is supplied from the digestive liquid tank 2 to the primary vacuum fermentation dryer 3 by gravity, but a pump may be provided to forcibly supply the digestive liquid L.

The vacuum fermentation / drying apparatus A is provided with three primary vacuum fermentation / dryers 3, but all of them have the same configuration, and one of them will be described. As shown in FIGS. 1 and 3, the primary vacuum fermentation dryer 3 has an atmospheric pressure inside as a closed container for accommodating the digestive liquid L supplied from the main pipe 2d to the branch pipe 2e and further through the inlet 30a. It is provided with a substantially cylindrical tank (pressure resistant tank) 30 which is airtightly formed so as to be held below. A heating jacket 31 is provided on the peripheral wall portion of the tank 30, so that the heating steam generated by the gas power generation boiler 7 is supplied to the heating jacket 31. The temperature of the steam supplied from the gas power generation boiler 7 is preferably, for example, about 140 ° C.

Further, a stirring shaft 32 extending in the longitudinal direction (left-right direction in FIG. 3) is provided inside the tank 30 so as to be surrounded by the heating jacket 31. The stirring shaft 32 is rotated at a predetermined rotation speed by the electric motor 32a. The stirring shaft 32 is provided with a plurality of stirring plates 32b spaced apart from each other in the axial direction, and the digested liquid L is stirred by these stirring plates 32b, and the primary fermentation and drying treatment is performed from the digested liquid L. The dried product is fed in the longitudinal direction of the tank 30.

An inlet 30a for the digestive juice L is provided on the upper part of the front wall of the tank 30, and the digestive juice L charged from the inlet 30a is agitated by the rotation of the stirring shaft 32 while being heated by the heating jacket 31. Will be done. Then, after a lapse of a predetermined time, the primary dried product is discharged from the discharge portion 30b provided in the lower part of the rear wall of the tank 30. A hydraulic motor may be used instead of the electric motor 32a.

A discharge pipe 3a is connected to each discharge portion 30b of the primary vacuum fermentation dryer 3, and these three discharge pipes 3a are gathered in one discharge main pipe 3b. As shown in FIG. 4, a screw conveyor 3c is provided in the discharge pipe 3a and the discharge main pipe 3b in order to discharge the viscous primary dried product.

The discharge main pipe 3b is inclined upward to the right and is connected to the input port 30'a of the secondary vacuum fermentation dryer 3'. In this way, the primary dried product is charged from the primary vacuum fermentation dryer 3 to the secondary vacuum fermentation dryer 3'. Then, after a lapse of a predetermined time, as shown in FIG. 5, the secondary dried product can be discharged from the discharge unit 30'b of the secondary vacuum fermentation dryer 3'. Since the secondary vacuum fermentation dryer 3'has almost the same configuration as the primary vacuum fermentation dryer 3, details are omitted.

In FIG. 1, three primary vacuum fermentation dryers 3 and one secondary vacuum fermentation dryer 3'are connected to one cooling tower 8, but in FIG. 3, for the sake of clarity, the primary is primary. It is assumed that one cooling tower 8 is provided for the vacuum fermentation dryer 3. Further, the gas power generation boiler 7 is the same as the cooling tower 8.

A guide portion 30c for guiding the steam generated from the heated digestive liquid L to the condensing portion 33 is provided above the tank 30. A plurality of cooling pipes 33b supported by a pair of heads 33a are provided inside the condensing portion 33 supported by the communication passage 34 via the guide portion 33c, and the plurality of cooling pipes 33b and the cooling tower are provided. A cooling water path 80 is provided between the 8 and the 8th. In the present embodiment, the condensing portion 33 extends in parallel along the longitudinal direction of the tank 30, and the condensing portion 33 is arranged on the rear side of the guide portion 30c.

Then, the cooling water that circulates in the cooling pipe 33b in the condensing portion 33 and whose temperature has risen due to heat exchange with the high-temperature steam flows through the cooling water path 80 as schematically shown by an arrow in FIG. 3 and is a cooling tower. It flows into the water receiving tank 81 of 8. The cooling tower 8 is provided with a pump 82 that pumps cooling water from the water receiving tank 81, and a nozzle 83 that injects the pumped cooling water. The cooling water jetted from the nozzle 83 receives air from the fan 85 while flowing down the lower part 84, the temperature drops, and the cooling water flows into the water receiving tank 81 again.

The cooling water cooled by the cooling tower 8 is sent by the cooling water pump 86, sent to the condensing portion 33 by the cooling water path 80, and circulates in the plurality of cooling pipes 33b again. Then, after the temperature rises due to heat exchange with the steam generated inside the tank 30 as described above, the water flows through the cooling water path 80 again and flows into the water receiving tank 81 of the cooling tower 8. That is, the cooling water circulates in the cooling water path 80 between the condensing unit 33 and the cooling tower 8.

In addition to the cooling water that circulates as described above, in the cooling tower 8, the condensed water in which the steam generated from the heated digestive liquid L is condensed in the condensing portion 33 is also injected. Although not shown, condensed water generated by heat exchange with high-temperature steam is collected below the condensed portion 33. Further, a vacuum pump 36 is connected to the condensing portion 33 via a communication passage 35 to reduce the pressure in the tank 30.

That is, by the operation of the vacuum pump 36, air and condensed water are sucked out from the condensing portion 33 through the communication passage 35, and further, air and steam in the tank 30 are sucked out through the communication passage 34 and the guide portion 30c. .. In this way, the condensed water is sucked out from the condensing portion 33 to the vacuum pump 36, and is guided from the vacuum pump 36 to the water receiving tank 81 of the cooling tower 8 by the water guide pipe. An opening / closing valve 3d is provided in the communication passage 34 so that air or the like is not sucked from the inside of the primary vacuum fermentation dryer 3 when the primary vacuum fermentation dryer 3 is stopped.

The condensed water thus guided to the water receiving tank 81 of the cooling tower 8 is mixed with the cooling water, pumped up by the pumping pump 82 as described above, injected from the nozzle 83, and then cooled while flowing down the lower part 84. .. The condensed water contains the same microorganisms as those added to the tank 30, and the odorous components and the like contained in the condensed water are decomposed, so that the odor does not dissipate to the outside of the tank. ing.

Explaining the operation of the primary vacuum fermentation dryer 3 having the above configuration, the digestive liquid L contained in the tank 30 is stirred by the rotation of the stirring shaft 32 while being heated by the heating steam supplied to the heating jacket 31. Will be done. Then, the digestive juice L contained in the tank 30 is effectively heated by receiving heating from the outside by the heating jacket 31 surrounding the inside of the tank 30 and heating from the inside by the stirring shaft 32 or the like. , The digestive juice L is stirred by the stirring shaft 32. In addition, since the pressure is reduced by the operation of the vacuum pump 36, the boiling point is lowered in the tank 30, and the water evaporates in the temperature region where the decomposition of the organic component of the digestive juice L is promoted by the microorganism.

In the vacuum fermentation / drying step by the primary vacuum fermentation / drying machine 3, one step (1 cycle) is preferably, for example, 24 hours. First, the digestive juice L is charged over 30 minutes, and then the digestive juice L is charged over 23 hours. At the same time as the fermentation step of decomposing the organic components of the above, a drying step of drying the digestive juice is provided, and the primary dried product (moisture content of 30 to 40%) is discharged over another 30 minutes. During that time, when the inside of the tank 30 is depressurized to −0.06 to −0.07 MPa (gauge pressure; hereinafter, the gauge pressure is omitted), the water temperature in the tank 30 is maintained at 76 to 69 ° C. (saturated steam temperature). To. As a result, the digestive juice L is promoted by the microorganism described later in the primary fermentation, decomposition and drying.

Next, the step of performing the vacuum fermentation drying process by the secondary vacuum fermentation dryer 3'is almost the same as the above, and the primary dried product is put into the tank 30'over 30 minutes and the primary drying is carried out in the same manner as described above for 23 hours. The unfermented organic matter of the thing is fermented and further dried. During that time, when the pressure inside the tank 30'is reduced to −0.09 to −0.10 MPa, the water temperature in the tank 30'is maintained at 46 to 42 ° C. (saturated steam temperature). As a result, the secondary fermentation decomposition drying of the primary dried product is promoted by the microorganism described later. Then, the secondary dried product (moisture content of 10% or less) can be discharged from the discharge unit 30'b of the secondary vacuum fermentation dryer 3'.
Then, as the microorganism to be added to the organic matter in the tanks 30 and 30'when performing such a drying treatment, for example, as described in Patent Document 2, a plurality of types of indigenous bacteria are used as a base. Pre-cultured complex effective microorganisms are preferable, and the so-called SHIMOSE 1/2/3 group is the center of the colony.

SHIMOSE 1 was sent to FERM BP-7504 (Ministry of Economy, Trade and Industry, National Institute of Advanced Industrial Science and Technology, National Institute of Advanced Industrial Science and Technology, Patent Microorganisms Depositary Center (1-1-3, Higashi, Tsukuba City, Ibaraki Prefecture, Japan), March 14, 2003. It was deposited internationally in Japan). In addition, SHIMOSE 2 is a microorganism belonging to FERM BP-7505 (which was deposited internationally like SHIMOSE 1) and Pichiafarinosa, which has resistance to salt, and SHIMOSE 3 is a microorganism belonging to FERM BP-7506 (SHIMOSE 1). Similarly, it is a microorganism belonging to Staphylococcus (which was deposited internationally).

Here, the procedure of the vacuum fermentation drying treatment of the organic substance by the primary vacuum fermentation dryer 3 will be described. First, the digestive liquid L contained in the digestive liquid tank 2 is charged into the charging port 30a of the tank 30 of the primary vacuum fermentation dryer 3. Then, the on-off valve 2f is closed to seal the inside of the tank 30 in an atmospheric pressure state.

Then, after adding a predetermined microorganism to the digestive juice L in the tank 30, the atmosphere opening valve 36a provided in the vicinity of the vacuum pump 36 is closed to seal the inside of the tank 30. Then, the inside of the tank 30 is heated under reduced pressure, and the organic component of the digestive juice L contained therein is first fermented and dried. That is, heating steam is supplied from the gas power generation boiler 7 to heat the inside of the tank 30.

Then, the inside of the tank 30 is heated by the heating steam, the stirring shaft 32 is rotated at a predetermined rotation speed (for example, about 8 rpm), and the inside of the tank 30 is depressurized by the operation of the vacuum pump 36. The temperature inside the tank 30 becomes the optimum environment for the activity of microorganisms, and the decomposition of organic components of organic substances by microorganisms is suitably promoted. The rotation speed (8 rpm) of the stirring shaft 32 is an example, and may be another value as long as the organic component of the organic substance can be decomposed.

When a predetermined time elapses while maintaining the temperature and pressure in the tank 30 in this way, the supply of heated steam from the vacuum pump 36 and the gas power generation boiler 7 is stopped, and the atmosphere release valve 36a is opened. It is in an atmospheric pressure state. On the other hand, the stirring shaft 32 is rotated in the reverse direction, the lid of the discharge portion 30b of the tank 30 is opened, and the primary dried product is discharged from the tank 30. At this time, the volume of the primary dried product discharged from the tank 30 is reduced.

Next, the primary dried product is put into the secondary vacuum fermentation dryer 3', and the procedure for the secondary vacuum fermentation drying process of the primary dried product is almost the same as that for the primary vacuum fermentation drying process. Is omitted. In this way, the secondary dried product can be discharged from the discharge unit 30'b of the secondary vacuum fermentation dryer 3'.

Then, as shown in FIG. 5, the secondary dried product subjected to the secondary vacuum fermentation drying process by the secondary vacuum fermentation dryer 3'is conveyed to the sorting device 4 by the discharge conveyor 41. That is, the sorting device 4 provided by the discharge conveyor 41 at a position higher than the discharge unit 30b for the secondary dried material discharged from the discharge unit 30'b at the lower part of the tank 30'of the secondary vacuum fermentation dryer 3'. Transport to. The sorting device 4 removes foreign substances, specifically plastics and metals, which are not decomposed by the vacuum fermentation and drying treatment by the vacuum fermentation and drying apparatus A.

The sorting device 4 includes a magnetic separator 42 and a vibration sieving machine 43, as outlined in FIG. The magnetic separator 42 is, for example, a hanging type, and is suspended on a discharge conveyor 41. The magnetic separator 42 attracts a metal fitting, a magnetic material such as an iron piece (indicated by a black circle) from the dried material conveyed by the discharge conveyor 41 by a magnet, and continuously discharges the container by a belt 42b moving between the pulleys 42a. It is configured to discharge to 42c. The magnetic separator 42 removes metal fittings and metals such as iron pieces mixed in the dried product.

The vibrating sieving machine 43 sifts a large foreign substance from the secondary dried material discharged from the secondary vacuum fermentation dryer 3'and conveyed by the discharge conveyor 41. The vibration sieving machine 43 includes a wire mesh 43a having a mesh (opening) of a predetermined size, and a vibration motor 43b that vibrates the wire mesh 43a. The vibration sieving machine 43 is supported on the lower base 43d by a plurality of (for example, four) coil springs 43c. Further, the wire mesh 43a is provided in a state of being inclined diagonally downward, and one end side (left end side in FIG. 6) of the wire mesh 43a is provided at a position lower than the other end side (right end side in FIG. 6). ing. In the present embodiment, the mesh of the wire mesh 43a is set to a size of 5 mm × 5 mm. The mesh size is an example and may be another value. The vibrating sieving machine 43 sorts out foreign substances such as plastic mixed in the secondary dried product.

As described above, since the vibration sieving machine 43 is floatingly supported by the coil spring 43c with respect to the lower base 43d, the dried material supplied from the discharge conveyor 41 to the wire mesh 43a is sieved by the driving of the vibration motor 43b. Specifically, the secondary dried product passes through the mesh of the wire mesh 43a, falls downward, and is stored in the storage container 44 arranged below the vibrating sieve 43. On the other hand, since a large foreign substance such as plastic cannot pass through the mesh of the wire mesh 43a, it slides down or rolls down along the inclined surface of the wire mesh 43a and moves to one end side (front side), and the vibration sieving machine 43. It is discharged to the discharge container 43e arranged in the front lower part of the above. As described above, as described above, the dried product is fermented and dried by the vacuum fermentation drying device A and the volume is reduced, so that the dried product is suitable for sieving, and most of the dried products other than foreign substances are the mesh of the wire mesh 43a. Is to be stored in the storage container 44 after passing through.

In this way, foreign substances such as metal pieces and plastics are removed from the secondary dried product, and high-quality organic fertilizer is stored in the storage container 44. In the embodiment of the present invention, the waste produced in the final process is used as an organic fertilizer as a valuable resource, but by adding an additive, the waste is an organic feed for livestock which is a valuable resource. Or, it may be used as an organic feed for cultivation.

The embodiments disclosed this time are exemplary in all respects and are not grounds for limited interpretation. The technical scope of the present invention is not construed solely by the embodiments described above, but is defined based on the description of the scope of claims. In addition, the technical scope of the present invention includes all modifications within the meaning and scope equivalent to the scope of claims.

INDUSTRIAL APPLICABILITY The present invention can be used in a device for treating digestive juice, which is fermented residue, and a method for treating the same in methane fermentation of organic matter.

A Low-pressure fermentation / drying device 1 methane fermentation tank 2 digestive liquid tank 3 primary low-pressure fermentation / drying machine 3'secondary low-pressure fermentation / drying machine 4 sorting device (magnetic separator, vibration sieving machine)
6 Gas tank 7 Gas power generation boiler 8 Cooling tower

Claims (4)

A methane fermenter that ferments organic matter and
A digestive juice tank connected to the methane fermenter and storing the digestive juice produced in the fermenter,
A dried product connected to the digestive juice tank, containing the digestive juice in a closed container, stirring while heating to a predetermined temperature range under reduced pressure, and decomposing organic components of organic substances using microorganisms to reduce the volume. Provided with a vacuum fermentation drying device to obtain
The vacuum fermentation drying device is
At least two or more primary vacuum fermentation dryers,
It has a secondary vacuum fermentation dryer which is connected in series to the primary vacuum fermentation dryer and has a number of installed primary vacuum fermentation dryers or less.
Further, the main pipe connected to the digestive juice tank and
The branch pipes branched from the main pipes and
At least two or more of the primary vacuum fermentation dryers connected to the branch pipes, respectively.
It has an on-off valve and an on-off valve provided in each of the branch pipes.
The treatment time required for the fermentation and drying treatment by the primary vacuum fermentation dryer and the treatment time required for the fermentation and drying treatment by the secondary vacuum fermentation dryer are shorter than the treatment time required for the fermentation treatment in the methane fermentation tank. ,
When the fermentation and drying treatment is performed at the same time by the two or more primary vacuum fermentation dryers, the two or more primary vacuum fermentation dryers can be used from the digestive liquid tank by adjusting the opening degree of each of the on-off valves. A digestive juice processing device for organic methane fermentation, which is characterized by supplying an optimum amount of digestive juice . In the device for treating digestive juice in methane fermentation of an organic substance according to claim 1 .
A device for treating a digestive juice in methane fermentation of an organic substance, which comprises a sorting device for removing foreign substances mixed in the dried product discharged from the secondary vacuum fermentation dryer. In the apparatus for treating digestive juice in methane fermentation of an organic substance according to any one of claims 1 and 2 .
A device for treating digestive juice in methane fermentation of organic substances, which comprises burning methane gas generated in the methane fermentation tank for gas power generation and utilizing a part of the heat energy as a heat source of a vacuum fermentation drying device. A method for treating digestive juice in methane fermentation of an organic substance using the digestive juice processing apparatus for methane fermentation of an organic substance according to any one of claims 1 to 3.
Methane fermentation process of organic matter and
The step of storing the digestive juice produced after the methane fermentation and
The digestive juice is housed in a closed container, and the mixture is stirred while being heated to a predetermined temperature range under reduced pressure, and the organic components of the organic substance are decomposed by using microorganisms to obtain a dried product having a reduced volume. A method for treating digestive juices in methane fermentation of organic matter, characterized in that it comprises.

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