JP2005034041A - Method for producing methane gas and fermentation product by combined use of anaerobic bacterium methane gas fermentation and aerobic bacterium fermentation and apparatus therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing methane gas and a fermentation product, using an anaerobic bacterium methane gas fermentation apparatus and an aerobic bacterium fermentation apparatus, and performing the effective utilization of biological heat and the deodorizing treatment of a waste fluid to stably and safely produce the methane gas and the fermentation product at low costs, and to provide an apparatus for producing the methane gas and the fermentation product. <P>SOLUTION: This method for producing the methane gas and the fermentation product, using an anaerobic bacterium methane gas fermentation apparatus [A] and an aerobic bacterium fermentation apparatus [B] using an aerobic high temperature bacterium having the optimal activity temperature of ≥80°C or its bacterium mixture or their culture product, is characterized by heating the exhaust heat with the effective means of a heat pump 20 to use the heat for heating ventilation air or a methane gas raw material, thus promoting the fermentation. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a manufacturing method and apparatus for effectively working methane gas and fermentation products by using an anaerobic bacterium fermentation apparatus and an aerobic bacterium fermentation apparatus in combination. In the present invention, "anaerobic fermentation" refers to an anaerobic fermentation method generally referred to as methane gas fermentation, and "anaerobic fermentation apparatus" refers to an anaerobic fermentation apparatus that generates methane gas. Say. The term “aerobic bacteria fermentation” refers to obtaining a fermentation product by adding aerobic bacteria to an organic raw material and subjecting to aeration fermentation, and “aerobic bacteria fermentation apparatus” refers to obtaining the fermentation product. It refers to a fermentation device.

  Conventional methods of treating organic waste (sewage sludge, municipal waste, industrial waste, agricultural waste, livestock waste such as livestock manure) are incinerated, buried (landfilled), anaerobic It is limited to bacterial fermentation (methane gas fermentation) and aerobic bacterial fermentation (a method of composting at a fermentation temperature of 55 ° C. or lower). Organic disposal of organic waste is prohibited. However, current organic waste treatment methods have not solved many problems such as energy consumption, treatment costs, environmental problems such as odor, pollution measures such as heavy metals and dioxins, and treatment of incineration ash. The processing method is also not a definitive solution.

  As an organic waste treatment method, the incineration treatment method has many problems such as smoke emission, fuel consumption, equipment costs, and disposal of incineration ash. Although the incineration treatment method has helped to save energy in terms of waste heat utilization, it has been unavoidably used in environmental administration management as a means to overcome costs and profits and losses due to the large amount of capital investment. .

  Therefore, conventionally used anaerobic bacteria fermentation apparatus and aerobic bacteria fermentation apparatus are more useful for the treatment of organic waste generated in large quantities such as sewage sludge and livestock manure. Currently, in many cases, these fermentation apparatuses are selected and installed alone depending on regional characteristics, environmental circumstances, and the amount of raw materials. However, these fermentation apparatuses have many difficulties described below.

  The anaerobic bacterium fermentation apparatus is aimed at generating methane gas together with the volume reduction processing of organic waste. However, most anaerobic bacteria fermentation apparatuses are in a state where the capital investment and operating profit are not profitable. This is due to the poor generation efficiency of methane gas. That is, a large amount of energy is consumed to raise the temperature of the organic waste as a raw material to the methane gas generation temperature (around 37 ° C.). In addition, the generated methane gas is consumed to raise the temperature of the raw material and to keep the raw material at the decomposition temperature (around 37 ° C.). Therefore, it is hard to say that the current anaerobic bacteria fermentation apparatus is a stable gas generator. Especially in winter, the temperature of the organic waste (sludge, manure, etc.), which is a raw material, is lowered to the same temperature as the outside air, so that it is necessary to consume auxiliary fuel for heating. Furthermore, the biggest difficulty is the treatment of the waste liquid, which is a residue of carbohydrates after the generation of methane gas, although the organic waste (carbohydrate) as a raw material is changed under anaerobic conditions to generate methane gas. Since the waste liquid has an odor and is in a liquid state, it has a problem with no nutrients for transportation, disposal, and composting. In addition, the anaerobic bacteria fermentation apparatus must have a completely airtight structure in order to activate the anaerobic bacteria, and the equipment cost is high, and as described above, it is also a big problem that it is not profitable.

  On the other hand, an aerobic bacterium fermentation apparatus usually consists of a fermenter (or fermentation yard) and an aeration apparatus. In the aerobic bacteria fermentation method, organic waste added with aerobic bacteria is charged into the fermenter, air is blown into the organic waste by a ventilator, and it is fermented naturally under open conditions. In the conventional method at around 55 ° C., primary fermentation and secondary fermentation must pass, and the fermentation product (for example, compost such as compost) has a long time until it is fully matured (usually about 100 days until it is fully matured). Takes days. Further, during this time, it is necessary to cut back (stir) 10 times or more in the fermenter, so that labor saving is difficult. Furthermore, since the fermentation temperature is low as described above, it is not possible to remove odor, and it is necessary to add heat from the outside to the fermentation product and dry it for complete ripe composting. That is, it is difficult to obtain a fermented product that is completely aged only by fermentation at the natural fermentation temperature without forced drying. Moreover, in all aerobic bacteria fermentation, it takes a long time to increase the initial temperature (at the start of fermentation), but it takes a long time especially when the raw material temperature is low depending on the season. Furthermore, if the water content of the raw materials charged is high, proper breeding of aerobic bacteria can be prevented. Moreover, if the air required for aerobic bacteria fermentation is blown in with the outside air temperature, it is possible to prevent the fermentation temperature from increasing. In addition, since it is better that the raw material is in contact with the air, the fermenter often uses an open top tank only for the roof, and since it is transparent to the outside air, the fermented steam condenses on the ceiling in the winter, They tend to fall as water droplets and lose valuable energy.

Thus, both anaerobic bacteria fermentation apparatuses have many problems, such as the efficiency of methane gas generation is poor, and the aerobic bacteria fermentation apparatus requires a long time for fermentation. And neither fermenter considers energy saving at all. The following Patent Document 1, Patent Document 2, and Patent Document 3 are known techniques having the contents of the above-described conventional technique.
JP 2001-342088 A (previous page) Japanese Patent Laid-Open No. 2002-020188 (previous page) JP 2002-126780 A (previous page)

  Japanese Patent Laid-Open No. 2001-342088 “Biogas Production Method and Biogas Production Device” accelerates the generation of methane gas by aging compost and heating the liquid fertilizer in the fertilizer for liquid fertilizer using heat generated Is. In addition, “Biogas production method and biogas production apparatus” disclosed in Japanese Patent Application Laid-Open No. 2002-20188 uses a heat generated from compost and heat from an external heating device such as a heater or hot air blower in the fertilizer for liquid fertilizer. The liquid fertilizer is heated to promote the generation of methane gas and the like. In addition, “Sewage treatment method, sewage treatment system, surplus sludge biotreatment method and treatment system thereof” disclosed in Japanese Patent Application Laid-Open No. 2002-126780 uses part of the activated sludge withdrawn from the settling basin of the sewage treatment facility as return sludge. It is returned to the previous stage of the sedimentation basin, the remaining surplus sludge is concentrated and sent to the digestion tank, and it is decomposed by anaerobic bacteria such as methane and produced bacteria to make the concentrated sludge into digested sludge, and methane gas is generated during the treatment process. And while heating with the fuel energy of this methane gas, it is sent to a high temperature aerobic reaction tank and aerated, then decomposed by high temperature aerobic bacteria, the semi-decomposed product is returned to the previous stage of the sedimentation basin and activated Decomposes sewage.

  The present invention has been invented in view of the above circumstances, the problem to be solved is to eliminate the disadvantages of both fermentation by using anaerobic and aerobic fermentation together, Providing fermentation methods that take advantage of their strengths. Moreover, it aims at providing the apparatus method and apparatus which obtain methane gas and a fermentation product efficiently using the fermentation.

  In order to achieve the above object, the present invention of claim 1 uses both an anaerobic methane gas fermentation apparatus and an aerobic bacterium fermentation apparatus using a methanogenic bacterium to perform anaerobic methane gas fermentation. Methane gas fermentation heat and / or aerobic bacteria fermentation heat generated in the fermentation process, steam, and heat after maturation, or any selected heat from the organic material raw material used for the anaerobic bacteria methane gas fermentation and / or the preference It is characterized in that it is used as heat for heating the air for a blower used at the time of aerobic bacteria fermentation.

  Further, the invention of claim 2 uses both an anaerobic methane gas fermentation apparatus and an aerobic bacterium fermentation apparatus using methanogens, and methane gas fermentation heat and / or aerobic bacteria fermentation during anaerobic methane fermentation. Exhaust heat generated during the fermentation process, steam, exhaust heat after maturation, or any selected heat is used to heat the organic raw materials used for the anaerobic methane gas fermentation and / or the blower air used during the aerobic bacterium fermentation While using as a heat | fever, mixing the fermentation of said aerobic microbe generation and a part of product into the fermentation raw material of the said anaerobic microbe methane gas fermentation is aimed at, and the rise promotion of anaerobic microbe fermentation temperature is measured.

  Further, the invention of claim 3 is directed to an organic raw material used for fermentation of ultra-high temperature aerobic aerobic bacteria, such as an advanced hyperthermia bacterium, a hyperthermia bacterium, an aerobic thermobacteria or a mixed bacterium having an optimum activity temperature of at least 80 ° C. It is characterized by performing fermentation by adding a body or a culture thereof.

  Further, the invention of claim 4 relates to methane gas of anaerobic bacteria methane gas fermentation by methanogen and heat generated during fermentation and / or steam heat generated during aerobic bacteria fermentation of ultra-high temperature aerobic and heat generated during aging. Heating the organic material raw material used for the anaerobic methane gas fermentation and / or the air for the blower used for the aerobic thermophilic fermentation of ultra-high temperature aerobicity through a heat pump using all or any selected heat as a heat source To do.

  Further, according to the invention of claim 5, whether the waste liquid generated at the time of the anaerobic methane gas fermentation is mixed in the raw material of the aerobic bacteria fermentation, or the waste liquid is heated at a sterilizable temperature and time and discharged as liquid fertilizer. It is characterized by performing both or any of the above.

  Further, the invention of claim 6 is characterized in that a part of the aerobic bacteria fermentation product (medium or inoculum) is mixed in the raw material of the anaerobic bacteria methane gas fermentation to promote an increase in anaerobic bacteria fermentation temperature. To do.

  The invention of claim 7 is an apparatus used for producing the methane gas and fermentation product of claims 1 to 6, wherein the apparatus is an anaerobic methane gas fermentation apparatus and an aerobic fermentation using methanogens. It consists of what used two with an apparatus, and is characterized by making methane gas and a fermentation product by mutually utilizing the heat and waste liquid of both apparatuses.

  The invention according to claim 8 is characterized in that the manufacturing apparatus is provided with a heat pump using heat generated during fermentation as a heat source.

  The invention of claim 9 is characterized in that the heat pump is of a built-in type, and a gas heater is provided in the heat absorption part.

  As described above, according to the present invention, conventionally, both the methane gas fermentation apparatus and the aerobic bacteria fermentation apparatus are operated independently, and the disadvantages are not solved, and the respective advantages are not utilized and the wastes are generated. Although an effective product of (organic) was not produced, the present invention complemented each other's advantages and disadvantages, and was able to increase the efficiency of energy use. Smelters, stored manure, organic waste, food waste, etc. were removed from the odor caused by high-temperature fermentation, and fully aged products and methane gas could be produced continuously and stably. In addition, the addition of both facilities makes it possible to easily complement each other's heat, and it is possible to create a circulatory system that returns to the soil that has been born from soil, which is an inexpensive and economical facility. A cheap product was produced and a product was made at the same time. The most troublesome methane waste liquid has become an aerobic product product with no odor and labor saving. Organic waste manure, sludge, stored manure, etc. could be converted into products of useful methane gas and organic complete products without relying on incineration. Cellulose is not fermentatively decomposed in aerobic ultrahigh-temperature bacterial fermentation. On the other hand, methane fermentation in an anaerobic bacteria fermentation apparatus decomposes cellulose well. For anaerobic bacteria, cellulose is broken down into hydrocarbons to produce methane gas. Rather, for anaerobic bacteria, cellulose is a valuable raw material for bacteria and decomposes if the aerobic fermentation product is mixed into the raw material. On the other hand, since the waste liquid discharged from the anaerobic bacterium fermentation apparatus is decomposed into cellulose, mixing with the raw material of the aerobic bacterium fermentation results in composting with a good maturity for the aerobic bacterium fermentation side that does not decompose. The present invention measures fermentation acceleration and energy saving by mutually complementing the heat of fermentation generated from aerobic and anaerobic, and further the aerobic bacterial fermentation product generated from both The temperature up to the start of anaerobic methane in the anaerobic bacterium is promoted by anaerobic microbial fermentation, and the waste liquid generated from the anaerobic bacterium fermentation equipment is supplied to the aerobic bacterium fermentation side raw material. It is intended to complement the. In other words, the two devices are close to each other, and mutual complementation of exhaust heat and each exhaustion are also mutually complemented to increase the efficiency and form a fully matured circulation system.

  Hereinafter, an embodiment of a method for producing a methane gas and a fermentation product using the anaerobic methane fermentation apparatus and the aerobic fermentation apparatus of the present invention will be described in detail with reference to the drawings. In FIG. 1, “A” indicates an anaerobic methane fermentation apparatus that produces methane gas, and “B” indicates an aerobic fermentation apparatus that produces an aerobic fermentation product. It should be noted that “A” and “B” are not limited to the form of the apparatus described below and the contents of the flow in the manufacturing method, and naturally include those in the same technical category. The anaerobic bacteria methane gas fermentation apparatus (“A”) includes a methane gas fermentation raw material heater 17 that heats the methane fermentation raw material from the methane gas fermentation tank 7, the next aerobic fermentation heating tank 40, and the methane fermentation raw material introduction pipe 28. It consists of. A methane fermentation raw material (methane bacterium) 8 is accommodated in the methane gas fermentation tank 7, and a methane gas fermentation waste liquid delivery pipe 6 provided with a valve 13 and a waste liquid pump 14 is connected to the methane fermentation waste liquid reservoir 12 below the methane fermentation fermentation liquid 7. . In addition, a pipe for discharging methane gas generated in the tank is connected to the methane gas outlet 39 at the upper part of the methane gas fermentation tank 7, and a methane gas heat recovery device (heat absorber) 18 is connected to the pipe. The methane gas fermentation raw material heater 17 is provided with a condenser 25, a methane gas heat part 26, a methane gas burner 27, and the like, and the methane gas heat recovery unit 18 is provided with a methane gas heat part 26 and an evaporator 24. The aerobic fermentation heating tank 40 is provided with a methane gas fermentation raw material inlet 10 for introducing the methane gas fermentation raw material into the methane gas fermentation tank 7. An aerobic inoculum introduction tube 4 is connected from the upper part of the methane gas fermentation tank 7.

  On the other hand, the aerobic bacteria fermentation apparatus (“B”) is provided side by side with the anaerobic bacteria methane gas fermentation apparatus (“A”), an aerobic bacteria fermentation yard 1, an aerobic fermentation side heat recovery device (endothermic device) 15, , A blower discharge side heat exchanger chamber (heater housing) 16 having a blower 19 and the like, between the aerobic bacteria fermentation apparatus ("B") and the anaerobic bacteria methane gas fermentation apparatus ("A") Is provided with a heat pump 20. The aerobic bacteria fermentation yard 1 is 1-a, 1-b, 1-c, 1-d, 1-e, 1-f, 1-g, 1-h, 1-i, 1-j, etc. The aerobic fermentation product 2 is introduced into these tanks by the aerobic fermentation raw material introduction pipe 3 and the waste liquid from the methane gas fermentation waste liquid delivery pipe 6 is introduced into these tanks. The inoculum is introduced from the aerobic inoculum introduction tube 4. The aerobic inoculum introduction tube 4 is connected to a fully-ripe aerobic fermentation product sieving device 31. Further, below the aerobic bacteria fermentation yard 1, there are provided a blower pipe 30 and an air blower branch pipe 5 connected to the blower discharge side heat exchanger chamber 16, and the blower main pipe 30 is provided with each aerobic fungus fermentation by the air blowout holes 29. It communicates with the tank 1-a. The blower discharge side heat exchanger 16 includes a condenser 25, a methane gas heat unit 26 and a methane gas burner 27, and the aerobic fermentation side heat recovery unit 15 includes an evaporator 24, a methane gas heat unit 26 and a methane gas burner 27. It consists of what you have.

  In the final aerobic bacteria fermentation 1-j, a transport facility 21 for transporting the aerobic fermentation product (medium) is arranged. A methane gas lead-out pipe 22 is connected to the methane gas heat pipe 26 of the methane gas heat recovery unit 18, and methane gas lead-out pipes 22 a, 22 b, and 22 c are branched and connected to an intermediate part of the methane gas lead-out pipe 22. The methane gas outlet pipe 22 is also connected to the methane gas heat section 26 of the aerobic fermentation side heat recovery device 15. Moreover, the methane gas heat | fever part 26 of the aerobic fermentation side heat recovery device 15 is connected with the methane gas introduction pipe 22b. Further, the methane gas outlet pipe 22 a is connected to the methane gas heat section 26 of the blower discharge side heat exchanger chamber 16. The methane gas outlet tube 22 c is connected to the methane gas heat section 26 of the methane gas fermentation raw material heater 17.

  The heat pump 20 is connected to the evaporator 24 of the aerobic fermentation side heat recovery device 15 and the heat pump suction device 33 connected to the evaporator 24 of the methane gas heat recovery device 18 on the inlet side, and the heat pump discharge pipe 32 on the outlet side discharges air. The condenser 25 of the side heat exchanger chamber 16 and the condenser 25 of the methane gas fermentation raw material heater 17 are connected. Further, a high pressure liquid pipe 34 is connected to the condenser 25 of the methane gas fermentation raw material heater 17, and this high pressure liquid pipe 34 is connected to the evaporator 24 of the methane gas heat recovery unit 18 through the expansion valve 23. Further, the high-pressure liquid pipe 34 is connected to the evaporator 24 of the aerobic fermentation side heat recovery unit 15 via the expansion valve 23, and is further connected to the condenser 25 of the blower discharge side heat exchanger chamber 16. In FIG. 1, reference numeral 11 is an aerobic fermentation steam, reference numeral 35 is an exhaust port, reference numeral 36 is an air inlet, reference numeral 37 is an air outlet, and reference numeral 38 is an embedded heat exchange pipe. A heat exchanger is provided in the buried heat exchange pipe, and these are connected to the heat exchanger 47 shown in FIG. The heat exchanger 47 is provided with an evaporator 24 and an expansion valve 23.

  Next, a method for producing methane gas and a fermentation product by the apparatus of the present invention having the above structure will be described. In the anaerobic methane gas fermentation apparatus “A”, the raw material is supplied from the methane fermentation raw material introduction pipe 28 into the methane gas fermentation tank 7. This raw material is heated by the methane gas fermentation raw material heater 17 and the aerobic fermentation heating tank 40 and introduced into the methane gas fermentation tank 7 from the methane gas fermentation raw material inlet 10. The methane gas fermentation raw material heater 17 will be described in detail later, but a heat pump that uses exhaust heat after aging of the aerobic fermentation steam 11 and the aerobic fermentation product by the heat of fermentation from the aerobic bacteria fermentation apparatus "B" as a heat source. The heat of condensation 20 is heated through the condenser 25 and is heated by the sensible heat of the methane gas generated by the methane gas heating unit 26. Further, in cold weather such as winter, the heat is supplemented by the methane gas burner 27 to sufficiently heat the raw material. I have to. That is, the problem of the cost increase of high energy consumption by heating the methane fermentation raw material (methane bacterium) 8 to the fermentation temperature by fossil fuel such as external heavy oil heating as in the prior art is performed by heating with a heat pump using exhaust heat. There is a great feature in that it is intended to save energy and the cost can be reduced.

  On the other hand, due to the methane gasification of the raw material in the methane gas fermenter 7, the waste liquid from the residue has accumulated in the methane fermentation waste liquid reservoir 12, and there has been the greatest trouble with this treatment. In the present invention, the waste liquid is opened with the two-way valve 13 and the waste liquid pump 14 is operated, and the methane gas fermentation waste liquid delivery pipe 6 is mixed with pancakes such as human waste from the aerobic fermentation raw material introduction pipe 3. It is charged into the fungus fermenter 1a, etc., and mixed and deposited together with the inoculum. This mixed deposit is fermented by supplying an enzyme from the air blowing hole 29 at the bottom of the aerobic bacteria fermenter 1a, etc. to generate aerobic bacteria fermentation steam 11. That is, the waste liquid directly becomes a raw material for aerobic fermentation and becomes a product (medium, compost) of the aerobic fermentation product 2.

  As described above, since the waste liquid is introduced into the aerobic bacteria fermentation tank 1a of the aerobic bacteria fermentation apparatus and reused, the waste liquid is not sent to the outside and no special sterilizing means is required. However, there are cases where the waste liquid is not reused. As shown in FIG. 1, a two-way valve 13 is provided below the methane gas fermenter 7, and the waste liquid is divided into a case where it is sent to the waste liquid pump 14 side and a case where it is sent to the heater 41 side as described above. The heater 41 has a condenser 25, and the condenser 25 is connected to the condenser 25 of the methane gas fermentation raw material heater 17 through a pipe 43 and is connected to the high-pressure liquid pipe 34 through a pipe 44. The waste liquid is sterilized when heated by a heater 41 at, for example, 70 ° C. for about 1 hour, and becomes harmless liquid fertilizer 42 to become a culture medium.

  As described above, the methane gas 9 is stored in the methane gas fermenter 7, and this methane gas 9 is sent from the methane gas outlet 39 at the top of the methane gas fermenter 7 to the methane gas heat recovery device 18 side, and the operating heat of the evaporator 24 is At the same time, the methane gas outlet pipes 22, 22a, 22b and 22c are separated and the remaining ones are discharged. The heat recovered by the evaporator 24 of the methane gas heat recovery device 18 becomes a heat source of the heat pump 20 via the heat pump suction pipe 33.

  Next, the system | strain of the aerobic microbe fermentation apparatus of "B" is demonstrated. In the present invention, the aerobic bacteria fermentation yard 1 is composed of a large number of aerobic bacteria fermentation tanks 1a, etc., but the amount of deposits in one aerobic bacteria fermentation tank 1a is about 50 to 120 tons or so. Yes. This sediment is a raw material of about 70% humidity of pancakes such as human waste and stored manure, and 20% to 50% of the back fermentation product as a viable fungus from an inoculum introduction tube (not shown) or a mixture thereof and “A” The waste liquid from the anaerobic methane gas fermentation apparatus is mixed. This deposit is fermented by supplying the enzyme from the air blowing hole 29 at the bottom, but the aerobic bacteria fermenter 1a and the like are turned over every June to July so that the fermentation proceeds on average. . The reversal is performed by moving the deposits to the empty tank with a shovel hopper. Finally, as shown in FIG. 1, the aerobic bacteria fermentation tanks 1 a to 1 j are filled and conveyed by the delivery facility 21. By the above, fermentation and conveyance averaged smoothly are performed.

  The deposit reaches about 80 ° C. at about 10 days from the normal temperature, and the central portion becomes about 90 ° C. In this case, the aerobic bacteria include bacteria that ferment to at least 80 ° C. or more and around 100 ° C., which are super thermophilic bacteria. In particular, the bacteria that are layered on the Pachirus layer of FERMP-15085 (common name: YM-01), FERMP-15086 (YM-02) and FERMP-15087 (YM-03), which are patented as Patent No. 306422, FERMP-15536 (YM-04), FERMP15537 (YM-05), FERMP-15538 (YM-06), FERMP-15539 (YM-07), FERMP-15540 (patent application of Japanese Patent Application No. 9-52312) YM-08), FERMP-15541 (YM-09), and FERMP-15542 (YM-10) belonging to the cardotrix layer are the enzyme hyperthermophilic fermenters of the present invention. This high-temperature fermentation can be used as a heat source of the heat pump 20 that uses a bioreactor, and can achieve an energy saving effect.

  The temperature rises and falls on the 6th to 7th days, with the peak at around 90 ° C, and the temperature begins to drop. Therefore, when this time is switched back to med and aiming for complete aging, the temperature changes roughly every 6 to 7 days. By performing peak reversal for 5 to 6 days, a further fermentation product is completed in about 40 days when ripening is completed.

  During the fermentation, about 70% of the water is actively evaporated and discharged as steam due to the temperature rise. Conventionally, it has been released to the atmosphere as it is, but the present application is from the aerobic fermentation side heat recovery unit 15 through the heat pump 20 that uses the latent heat of this steam and the sensible heat of fermentation of the product from about 90 ° C. to room temperature after aging. The air and methane gas raw material which are sent to the aerobic fermentation are heated by the condenser 25 of the blower discharge side heat exchanger 16 of the blower 19 and the condenser 25 of the methane gas fermentation raw material heater 17 through the heat pump discharge pipe 32. Is. If the driving force of the heat pump 20 is driven by the engine, the heat of the jacket and the heat of the engine exhaust are also added, so that the efficiency of the heat pump 20 is increased. The rise time of the initial fermentation of the aerobic fermentation is shortened by heating the air, and the aging time of about 40 days is shortened to 30 to 35 days. In particular, the rise in humidity at the start of winter and every turnover is accelerated.

  Moreover, since the raw material for methane gas fermentation is heat pump condensation heat, which can efficiently give aerobic high-temperature fermentation heat, the methane fermentation time can be shortened compared with the means for heating from the outside, and energy saving is achieved.

  As described above, when the “A” and “B” fermentation apparatuses are adjacently used together, the exhaust heat of each other works effectively via the heat pump 20 to compensate for the loss. In particular, the waste liquid of methane gas is effectively used and can be regenerated as a complete heat product. The loss of heat from each "A" and "B", generated gas heat, and the heat of the product after complete heat was released, and the loss of mutual energy due to the juxtaposition of the "A" and "B" devices. As a result, products of gas and fermentation products are stably produced.

  The complete heat product of the device “B” is passed through the complete thermo-aerobic fermentation product sieving device 31. The “B” device forms a circulatory system that is sent to the aerobic bacteria fermenter 1a and the like and reused as an inoculum. Since “A” and “B” complement each other and can continuously adjust the generated heat, stable operation is possible.

  Next, an embodiment of the aerobic ultrahigh temperature fermentation process will be described with reference to FIG. In FIG. 2, the horizontal axis indicates the day and the vertical axis indicates the temperature. The raw material sewage sludge was a dewatered coal sludge from Kagoshima City. A total of 100 tons was mixed with a tire shovel at a ratio of 1: 1 of returned sludge (unmatched product: particle size of 1 cm or more) of Kagoshima City sewage sludge compost, and fermenter plant (100 ton tank: 5 × 10 m). The feature of this compost loaded in) is that it does not use any auxiliary materials such as rice husk and sawdust. Therefore, product quality control is easy and stable quality compost is manufactured. The fermenter is a simple stacking type with a 100-ton tank with a height of 2 m, a height of 10 m, and a width of 5 m, and a ventilation blower for ventilation. The ultra-high temperature bacteria used for composting have a strong odor decomposability, so a deodorizing device is unnecessary. In the manufacturing process of the sewage sludge compost, the number of turnovers was 5 times, and the temperature was measured with a digital code thermometer (6 units). The product temperature was measured at five locations and the average was shown. First, it was 33.6 degreeC at the time of mixing a sewage contaminant and an inoculum microbe, and moving to a fermenter. The maximum temperature during the primary fermentation after 7 days after loading reached 90.7 ° C, and the minimum temperature was 82.1 ° C. The average temperature at this point was 86.7 ° C., and the temperature was 17.4 ° C., which means that it increased by 69.3 ° C. compared to the temperature. The average temperature at the end of the primary fermentation was 86.1 ° C. The temperature at the start of secondary fermentation is 68.5 ° C., the maximum temperature after 7 days reaches 92.6 ° C., the minimum temperature is 88.0 ° C., the average temperature is 90.2 ° C., and the temperature is 19.9 ° C. This is an increase of 70.3 ° C compared to the temperature for ℃. The average temperature at the end of the secondary fermentation was 87.4 ° C. The temperature at the start of the tertiary fermentation is 68.2 ° C, the maximum temperature after 6 days is 89.6 ° C, the minimum temperature is 85.8 ° C, the average temperature is 87.9 ° C, and the temperature is 20.0 ° C. It was 67.9 ° C. The average temperature at the end of the third fermentation was 84.9 ° C, and the temperature at the start of the fourth fermentation was 64.0 ° C. The maximum temperature (6 days after loading) reached 87.1 ° C, and the minimum temperature was 82.1 ° C. At that time, the average value of 5 series was 84.5 ° C and the temperature was 23.3 ° C. Therefore, it is 61.2 ° C. higher than the temperature. The average temperature at the end of the fourth fermentation was 81.2 ° C. The temperature at the start of the fifth fermentation was 67.7 ° C. The maximum temperature (7 days after loading) reached 84.5 ° C, and the minimum temperature was 80.1 ° C. At that time, the average value of 5 series was 81.9 ° C., and the temperature was 25.5 ° C. Therefore, it is 56.4 ° C. higher than the temperature. The average temperature at the completion of the fifth round was 76.6 ° C. From the above results, the compost quality reached a maximum of 92.6 ° C. (secondary turnover), and maintained a high temperature of 85 ° C. or higher over the manufacturing period of 45 days. The fermentation temperature obtained here was a threatening temperature higher than 10-20 ° C compared to the temperature of normal sewage sludge compost, and maintained a temperature far exceeding 80 ° C over 45 days. It is. At present, there is no composting technology at such a high temperature. This high temperature is the main cause of making urban sewage sludge into fully ripe compost in a short time of 40-45 days. This is because when the temperature rises by 10 ° C., the reaction rate of the organism increases by 1.5 to 1.8 times.

  As is clear from the above explanation, the present invention can treat organic waste harmlessly by a relatively simple apparatus and method, and is applied to all places where organic waste treatment is required. As a result, energy saving processing costs can be reduced, pollution prevention, environmental conservation, etc. can be greatly contributed.

It is explanatory drawing which shows the block diagram which shows the whole structure of the apparatus which manufactures the methane gas and fermentation product of this invention, and the flow for demonstrating the method. It is a schematic diagram which shows the relationship of the temperature of fermentation process of aerobic super thermophilic fermentation, the number of days, and turnover.

Explanation of symbols

“A” Anaerobic Methane Gas Fermenter “B” Aerobic Fermenter 1a-1j Aerobic Fermenter 2 Aerobic Fermentation Product 2 ′ Aerobic Fermentation Raw Material Feed Mix 3 Aerobic Fermentation Raw Material Introducing Tube 4 Aerobic Inoculum introduction pipe 5 Air blower branch pipe 6 Methane gas fermentation waste liquid delivery pipe 7 Methane gas fermentation tank 8 Methane gas fermentation raw material (methane bacteria)
9 Methane gas 10 Methane gas fermentation raw material inlet 11 Aerobic fermentation steam 12 Methane fermentation waste liquid reservoir 13 Two-way valve 14 Waste liquid pump 15 Aerobic fermentation side heat recovery device (heat absorber)
16 Blower discharge side heat exchanger chaba (heater housing)
17 Methane gas fermentation raw material heater 18 Methane gas heat recovery device (heat absorber)
19 Blower 20 Heat pump (compressor)
21 Aerobic fermentation product (medium) transport equipment 22 Methane gas outlet pipe 23 Expansion valve 24 Evaporator 25 Condenser 26 Methane gas heat 27 Methane gas burner 28 Methane fermentation raw material introduction pipe 29 Air outlet 30 Blow main pipe 31 Completely heated aerobic fermentation Product sieve device 32 Heat pump discharge pipe (high pressure)
33 Heat pump suction pipe (low pressure)
34 High-pressure liquid pipe 35 Exhaust port 36 Air inlet port 37 Air outlet port 38 Buried heat exchange pipe 39 Methane gas outlet port 40 Aerobic fermentation heating tank 41 Heater 42 Liquid fertilizer 43 Tube 44 Tube 45 Tube 46 Tube 47 Heat exchanger

Claims (9)

  Combined use of an anaerobic methane gas fermentation device and an aerobic bacterium fermentation device with methanogens, and heat generated during the fermentation process of anaerobic microbial fermentation and / or exhaust heat generated during fermentation of anaerobic bacteria, Anaerobic, characterized in that all or any selected heat of steam and exhaust heat after aging is used as heat for heating organic raw materials used for the anaerobic methane gas fermentation and / or blower air used during the aerobic bacterium fermentation A method for producing methane gas and a fermentation product, which is a combination of a fermentative methane gas fermentation apparatus and an aerobic bacterium fermentation apparatus.   Combined use of an anaerobic methane gas fermentation device and an aerobic bacterium fermentation device with methanogens, and heat generated during the fermentation process of anaerobic microbial fermentation and / or exhaust heat generated during fermentation of anaerobic bacteria, Use of all or any selected heat of steam and exhaust heat after aging as heat for heating the organic material raw material used for the anaerobic bacteria methane gas fermentation and / or the air for the blower used during the aerobic bacteria fermentation and generation of the aerobic bacteria An anaerobic methane gas fermentation apparatus and an aerobic bacteria fermentation apparatus characterized in that a part of the fermentation and product of the anaerobic methane gas fermentation are mixed in the fermentation raw material of the anaerobic bacterium and the increase in the anaerobic fermentation temperature is measured. A method for producing methane gas and fermentation products, which is used in combination.   To the organic raw material used for the fermentation of ultra-high temperature aerobic bacteria, the highly active thermobacteria, the thermophilic bacteria, the aerobic thermophilic bacteria, their mixed cells or their cultures whose optimum activity temperature is at least 80 ° C or higher are added. A method for producing methane gas and a fermentation product, comprising a combination of an anaerobic methane fermentation apparatus and an aerobic bacterium fermentation apparatus, characterized in that fermentation is carried out.   Anaerobic bacteria produced by methanogens Methane gas in methane gas fermentation and heat generated during fermentation and / or steam heat generated during aerobic bacteria fermentation of ultra-high temperature aerobic and heat generated during maturation or any selected heat An anaerobic methane gas fermentation apparatus characterized by heating an organic material raw material used for anaerobic methane gas fermentation and / or a blower air used for an aerobic high temperature aerobic fermentation using an aerobic bacterium through a heat pump A method for producing methane gas and fermentation products, which is used in combination with an aerobic fermentation apparatus.   The waste liquid produced during anaerobic methane gas fermentation is mixed with the raw material of the aerobic bacteria fermentation, or the waste liquid is heated at a temperature and time that can be sterilized and discharged as liquid fertilizer, or either. The manufacturing method of the methane gas and fermentation product which use the anaerobic bacterium methane gas fermentation apparatus and aerobic bacterium fermentation apparatus of Claim 1 thru | or 4 to use together.   6. A part of the aerobic bacteria fermentation product (medium or inoculum) is mixed in the raw material of the anaerobic bacteria methane gas fermentation to increase the anaerobic bacteria fermentation temperature. A method for producing methane gas and a fermentation product, comprising an anaerobic bacterium fermentation apparatus and an aerobic bacterium fermentation apparatus.   An apparatus used for producing a methane gas and a fermentation product according to any one of claims 1 to 6, wherein the apparatus uses two of an anaerobic methane gas fermentation apparatus and an aerobic bacteria fermentation apparatus using methanogens. An apparatus for producing methane gas and fermentation products, characterized in that the methane gas and fermentation products are produced by mutually using the heat and waste liquid generated by both devices.   The said manufacturing apparatus is provided with the heat pump which uses the heat which arises at the time of fermentation as a heat source, The manufacturing apparatus of the methane gas and fermentation product of Claim 7 characterized by the above-mentioned.   9. The apparatus for producing methane gas and fermentation product according to claim 8, wherein the heat pump is of a built-in type, and a gas heater is provided in the heat absorption part.

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