CN219239484U - Anaerobic fermentation and product utilization system for organic waste - Google Patents

Abstract

An anaerobic fermentation and product utilization system for organic waste comprising: an anaerobic fermentation unit having a mixing tank and a fermentation tank; the device comprises a natural gas generating device, an organic fertilizer generating device and a product utilizing unit for treating methane, grease, biogas residues and biogas slurry, wherein a gas collecting pipe is connected to a fermentation tank for supplying the collected methane to a generator for generating electricity. The steam turbine may be connected via a gas/liquid heat exchanger and a gas-heat stirring disk with nozzles located in the mixing tank and the fermentation tank. The discharging pool is connected with the solid-liquid separator and then is provided with a composting machine or a solid dryer or a fluidized bed dryer for treating organic matters discharged by the solid-liquid separator, the fluidized bed dryer is connected with a gas/liquid heat exchanger and/or a water condenser, and the water condenser is connected with heating pipelines of the mixing pool and the fermentation pool. A discharge baffle is obliquely arranged in the discharge tank. Thus realizing the reduction, recycling and harmless treatment of the organic waste.

Description

Anaerobic fermentation and product utilization system for organic waste

Technical Field

The utility model relates to the technical field of biomass energy for harmless treatment of manure. More particularly, it relates to an anaerobic fermentation and product utilization system for organic waste, which can be used in a system for treating manure, and also can be used for treating kitchen waste, wood pulp, municipal sewage, organic waste and other substances.

Background

In recent years, china has high importance on environmental protection, encourages the utilization of new technologies and new energy sources, and reduces the greenhouse effect and promotes the virtuous circle of ecology. Under the background, the biogas is used as a clean fuel with higher fuel value, has good economic benefit and environmental benefit and is supported by the national government. However, the prior manure treatment and the like still have the problems of secondary pollution, resource waste, high energy consumption, great process control difficulty and the like,

disclosure of Invention

In order to solve the problems, the utility model aims to provide an anaerobic fermentation and product utilization system for organic wastes, which can solve the problems of the existing organic waste treatment technology and can treat secondary pollution of farm cultivation from the source.

In one aspect of the present utility model, there is provided an anaerobic fermentation and product utilization system for organic waste, comprising: an anaerobic fermentation unit having a mixing tank and a fermentation tank; a product utilization unit provided with a natural gas generation device and/or an organic fertilizer generation device for treating the biogas, biogas residue and biogas slurry separated from the anaerobic fermentation unit; a gas collection tube; a generator, a hot water pipe connected between a cooling system in the generator and the mixing tank and/or the fermentation tank, and a heating and stirring unit comprising a gas delivery pipe and a gas heating and stirring disc, wherein the gas collection pipe is connected to the fermentation tank for supplying collected biogas to the generator for generating electricity, the heat energy of the cooling system in the generator being capable of being circulated to the mixing tank and/or the fermentation tank via the hot water pipe, the system further comprising: an internal combustion engine or a steam turbine, wherein the heated coolant in the cooler of the internal combustion engine is led to an air water cooler through a pipeline, the air water cooler is arranged in the mixing tank and/or the fermentation tank, a gas/liquid heat exchanger is arranged in connection with the steam turbine, the hot waste gas generated by the steam turbine provides heat for the gas/liquid heat exchanger, so that the heated gas is provided for a closed air circulation system and is returned to a gas heating stirring disc through a gas conveying pipeline, a nozzle of the gas heating stirring disc is positioned in the mixing tank and/or the fermentation tank, and the anaerobic fermentation unit further comprises a clarification tank, and the clarification tank is led to the mixing tank through a hot water return pipe.

Preferably, the system further comprises a hot water return pipe arranged between the clarification tank and the mixing tank for conveying hot water after fermentation in the clarification tank to the mixing tank to defrost and heat the fermentation raw materials.

Preferably, the fermentation tank is connected with a solid-liquid separator arranged in a discharging tank behind the clarification tank through a solid sewage pipeline; and/or an activated sludge circulation pipeline is arranged between the fermentation tank and the mixing tank.

Preferably, a circulating mechanism is further arranged behind the solid-liquid separator and is used for circulating part of the liquid treated by the solid-liquid separator into the mixing tank and/or the fermentation tank.

Preferably, a discharge baffle is obliquely arranged in the discharge tank, and a baffle main body of the discharge baffle is separated from the bottom of the discharge tank by a distance.

Preferably, a solid-liquid separator is arranged in the discharging tank, a composting machine or a solid dryer or a fluidized bed dryer is arranged behind the solid-liquid separator for treating the organic substances discharged from the solid-liquid separator, and a water condenser is arranged in connection with the fluidized bed dryer and is connected with the heating pipeline of the mixing tank and/or the heating pipeline of the fermentation tank.

Preferably, the gas/liquid heat exchanger is also connected to the composter or the solids dryer.

Preferably, the device also comprises a booster fan connected with the gas-heat stirring disc and/or a biodiesel generating device for treating grease separated from the anaerobic fermentation unit.

Preferably, a methane storage cabin is further provided, wherein methane is sent to the gas heat stirring disc through the gas conveying pipeline after being heated by the gas/liquid heat exchanger, and the gas heat stirring disc is arranged along the center wall of the fermentation tank.

According to the utility model, the system can stir sludge in the anaerobic fermentation tank by utilizing biogas and heat energy generated by the system, so that biogas power generation is generated or natural gas is produced, biogas residues and biogas slurry are directly used for farmland fertilization or solid liquid organic fertilizer production, zero pollution and ecological full circulation are realized, and the system is a typical energy ecological biogas engineering process, and particularly can provide an anaerobic fermentation and product utilization system for 'reduction', 'recycling', 'harmless' of organic wastes generated by farms.

Drawings

Fig. 1 schematically shows the general structure of an anaerobic fermentation and product utilization system for organic waste.

Figure 2 schematically shows a flow chart of a solid waste treatment process in the system.

Figure 3 schematically illustrates an alternative processing mode flow chart of the present utility model, second.

Fig. 4 schematically illustrates an alternative process mode flow diagram of the present utility model, three.

Fig. 5 schematically illustrates an alternative processing mode flow diagram of the present utility model.

Detailed Description

Exemplary embodiments of the present utility model are described in detail below with reference to the attached drawings. The exemplary embodiments described below and illustrated in the drawings are intended to teach the principles of the present utility model to enable one skilled in the art to make and use the present utility model in a number of different environments and for a number of different applications. The scope of the utility model is therefore defined by the appended claims, and the exemplary embodiments are not intended, and should not be considered, as limiting the scope of the utility model. Moreover, for the convenience of description, the dimensions of the various elements shown in the drawings are not necessarily drawn to actual scale, the same elements are denoted by the same or similar reference numerals, and the description thereof is simplified or omitted. References to orientation descriptions such as directions or positional relationships indicated by upper, lower, left, right, top, bottom, etc., and references to the preceding and following stages of connection relationships are based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus are not to be construed as limiting the present utility model.

According to the present utility model, an anaerobic fermentation and product utilization system for organic waste (also referred to as the system 10 for short) is provided, which mainly comprises a receiving and transporting unit 5, an organic waste pretreatment unit 6, an anaerobic fermentation unit 3, and a product utilization unit 7, and correspondingly, the treatment technical process thereof can be briefly described as follows: transport, pretreatment (including heating, solid-liquid separation), anaerobic fermentation (including raw material adjustment and anaerobic fermentation), biogas slurry and biogas residue separation, and product utilization (including respectively manufacturing and producing biodiesel, natural gas, granular organic fertilizer and the like). The mechanical stirring device mainly has no external mechanical power, and unpowered stirring is realized by utilizing heat exchange, gas/liquid circulation, solid-liquid convection and the like of the system, so that compared with the traditional electromechanical equipment, the mechanical stirring device has the advantage that maintenance dilemma during mechanical failure in a closed system is avoided.

Wherein, the receiving and transporting unit 5 can select a special organic waste transporting vehicle for transporting the organic waste, so as to prevent the odor gas from dissipating and polluting the environment around the transporting route. After the collected organic waste enters the pretreatment unit 6, the pretreatment unit 6 heats the inside of the raw material tank 11, performs solid-liquid separation by the raw material pre-separation device 12, and sends anaerobic fermentation raw material to the anaerobic fermentation unit 3 by the raw material feeding device 13 for anaerobic digestion. The anaerobic fermentation unit 3 comprises a feeding tank, an anaerobic fermentation tank, a biogas slurry concentration and after-ripening discharging tank and a biogas storage tank. Anaerobic fermentation raw materials enter a feeding tank in an anaerobic fermentation unit 3, the temperature is regulated, impurities are removed, the carbon-nitrogen ratio is regulated, the anaerobic fermentation raw materials enter the anaerobic fermentation tank, and generated substances containing biogas, biogas slurry and biogas residue enter a product utilization unit 7, wherein the main products are separated grease, biogas residue and biogas slurry, and the grease is produced into biodiesel through a diesel generating device, for example, a transesterification technology is adopted; biogas is produced into natural gas by a natural gas generating device, such as a PSA (pressure swing adsorption) unit and a CNG (natural gas pressurizing) unit, and is supplied to automobiles and users as gas; the biogas residues and the biogas slurry are prepared into organic fertilizer through an organic fertilizer generating device, for example, the organic fertilizer can be produced by entering a stirring, granulating and drying unit after being dehydrated by using dehydration equipment; the biogas slurry is aged, post-matured and concentrated to prepare the liquid organic fertilizer.

Thus, according to the utility model, the clean energy generated by treatment can relieve the crisis of petrochemical energy shortage; curing the generated biogas slurry to prepare a liquid fertilizer; the granular organic fertilizer produced by using the generated biogas residues can be used as a soil conditioner to increase the soil fertility.

Example 1

As shown in fig. 2, at the beginning of the operation of the present system 10, untreated manure collected from the livestock farm is the treatment material of the anaerobic fermentation unit 3. If necessary, a heat exchange device is arranged in the system, and the heat exchange device comprises a hot water return pipe arranged between the clarifying tank 15 and the mixing tank 1, and the hot water with the temperature of 38 ℃ after fermentation in the clarifying tank 15 can be conveyed to the mixing tank 1 to defrost and heat the fermentation raw materials therein. In addition, the sludge in the fermentation tank 2 can be stirred by means of stirring in the system by gas/heat circulation, and methane-based biogas can be produced in the tank, and the biogas is stored in the liquid upper part of the fermentation tank 2, below the ceiling or in a gas chamber. The compressed liquid in the gas chamber directly passes through the sewage pipe to reach the biogas slurry storage tank 17 (corresponding to the biogas slurry temporary storage tank shown in fig. 2). The biogas collected via the gas collection pipe 9 is used for a generator 18 (corresponding to a motor/generator) or an internal combustion engine for generating electricity. The cooling system in the generator 18 may also circulate thermal energy to the mixing tank 1 through hot water pipes to promote heating and agitation, or to promote heating and agitation in the mixing tank 1 and the fermentation tank 2. The hot water flowing from the generator 18 reduces the water temperature from 82 ℃ to 71 ℃ in the mixing tank 1 and the fermentation tank 2 by means of the air-water cooler 20. The solid precipitate generated after the fermentation of the manure in the fermentation tank 2 flows to the solid-liquid separator 19 through the solid sewage pipeline, and the activated sludge is conveyed to the mixing tank 1 or is returned to the fermentation tank 2 (if required) through the activated sludge circulation pipeline at the bottom of the fermentation tank 2, so that the heat source and tempering of the mixing tank 1 or the fermentation tank 2 can be provided. Part of the liquid treated by the solid-liquid separator 19 can be recycled into the mixing tank 1 and the fermentation tank 2 for subsequent treatment through a recycling mechanism.

The solid-liquid separator 19 is arranged in the discharge tank 14, and at least one discharge baffle 28 is arranged in the discharge tank 14, so that the solid in the solid-liquid mixture can be settled to the bottom of the tank more quickly, thereby effectively improving the settling efficiency of the settling tank. The slope and area of the discharging baffle 28 relative to the bottom of the tank can be designed according to practical requirements, and the baffle body is preferably spaced from the bottom of the tank by a certain distance through the landing leg, the arrangement direction of the baffle body can be along the transverse direction or the longitudinal direction of the discharging tank, the structure can be one to a plurality of plates, strips, curtains, films or a combination mechanism of the plates, in addition, the baffle material can be selected from a plurality of choices, and is not limited to metal, wood, synthetic materials, ceramic, mixed materials or the combination of the plates.

< example two >

In an alternative processing mode shown in fig. 3, the steam turbine 21 replaces the internal combustion engine in the above mode. The steam turbine 21 preferably employs a steam turbine combination system, or other similar steam turbine system. The fuel source for the turbine 21 may be methane in a biogas storage area or collected by the clarifier 15. Unlike the system of the first embodiment, in which the coolant to be heated is generated by the cooler of the internal combustion engine, the turbine 21 can heat the gas to about 235 c, and the hot exhaust gas thus obtained can heat the water in a closed loop by means of a gas/liquid heat exchanger 26 (corresponding to an air-water cooler). The heated water can be used for heating the mixing tank 1 and the solid-liquid mixture in the fermentation tank 2 through the hot water pipeline, and the flow of the fluid in the fermentation tank is promoted through heat exchange, so that the effect of stirring the fluid in the fermentation tank 2 is achieved. The gas/liquid heat exchanger 26 may also be connected to an organic fertilizer production facility (e.g., the composter 22) so that the heat energy generated by the turbine 21 may be used to perform the drying process of the composter 22.

Alternatively, the composter 22 may be replaced by a solids dryer 23, the heat energy of the solids dryer 23 may be provided by a steam turbine 21, or the sludge discharged from the solids-liquid separator 19 may be dried as in the reciprocating internal combustion engine 18 described in embodiment one. After discharging from the solid dryer 23, the activated sludge is transported to a bagging machine belt conveyor belt, and after bagging, fertilizer can be retail.

Example III

Another mode is illustrated in fig. 4, where the hot exhaust gas output from the steam turbine 21 is used in a gas/liquid heat exchanger 26 (corresponding to an air-water cooler) to heat methane gas in a biogas storage tank (upper part of the system, not shown) to 71 ℃, the heated methane gas being passed through a gas delivery pipe at the bottom of the system to a gas heat stirring plate 27 in the heating stirring unit 8, where it is injected into the mixing tank 1 and the fermentation tank 2 for heating and stirring, for example, via nozzles of the gas heat stirring plate 27. In this mode, the fermentation vat 2 is sealed from other air. Because methane is the only source of gas for heating and agitation. The methane gas sprayed out will be stored and reused by a methane storage tank (upper part of the system, not shown). This mode may be used in connection with organic fertilizer production equipment (e.g., composters 22) for actual use.

Alternatively, the composter 22 may be replaced by a solids dryer 23, and the heat energy of the solids dryer 23 may be provided by a steam turbine 21 for drying the sludge discharged from the solids-liquid separator 19. After discharging from the solid dryer 23, the activated sludge is transported to a bagging machine for bagging and can be retail as fertilizer.

Preferably, the system further comprises a booster fan 29 connected to the air heating agitator 27 for further enhancing the agitation intensity of the air heating agitator 27.

Example IV

Another mode is shown in fig. 5, in which a fluidized bed dryer 24 (corresponding to a fluidized bed drying apparatus) is substituted for the composter 22 or the solids dryer 23. The organic matter having a solid content of 35% separated from the solid-liquid separator 19 is introduced into the fluidized bed dryer 24, where the solid matter is heated in the closed gas path system and then dried by the fluidized bed. The water in the organic matters after treatment becomes water vapor in the heated air, and the hot air carrying the water vapor is circulated into the heating pipeline of the mixing tank 1 and the heating pipeline of the fermentation tank 2 after the water is removed by the water condenser 25. The hot exhaust gas generated by the steam turbine 21 supplies heat to a gas/liquid heat exchanger 26 (corresponding to an air-water cooler), so that heat can be supplied to the closed air circulation system through the gas/liquid heat exchanger 26. Excess moisture after combustion is removed after the hot gas passes through a water condenser 25 before the gas is discharged to the outside. The water condenser 25 can remove excessive water and also has the function of collecting heat in the hot air and heating the air in the air path. The heat thus collected can also be used for heating water in a closed loop waterway.

The combined mode of the fluid bed dryer 24 and the gas/liquid heat exchanger 26 allows for good collection of heat generated by the turbine 21 which would otherwise be lost. The heated air in the fluidized bed dryer 24 evaporates the moisture from the solid compressed material and the hot air carrying the steam after leaving the fluidized bed then enters the water condenser 25. The closed gas circuit system in the fluidized bed dryer 24 allows the use of a gas having a smaller oxygen content in the fluidized bed to reduce the possibility of combustion occurring during drying of the organic matter. A fan (not shown) with adjustable wind speed after the water condenser 25 may be added to the closed air circuit for compressing the air coming out of the fluid bed dryer 24.

As shown in fig. 5, the activated sludge is discharged from the fluidized bed dryer 24 and then transported to a loading baler where it may be used as fertilizer for retail sale.

< Process and technical Effect >

As described above, in the anaerobic fermentation and product utilization system for organic waste according to the present utility model, the process flow is as follows: the method comprises the steps of collection and transportation, pretreatment, anaerobic fermentation, biogas slurry and biogas residue separation, and product utilization, wherein raw materials can flow in an anaerobic fermentation tank 2, the whole stay period is 21 days, all manure is in the same stay time in a biogas preparation area, the manure directly enters a fermentation reactor for anaerobic reaction, biogas can be generated or produced into natural gas, the biogas residue and biogas slurry can be directly used for farmland fertilization or produced into solid liquid organic fertilizer, and the ecological biogas engineering with zero environmental pollution and ecological full circulation is realized.

The anaerobic fermentation process flow can be briefly described as follows: raw material adjustment, anaerobic fermentation, biogas slurry and biogas residue separation, namely, the mixed raw materials enter a feeding tank, the solid content of the raw materials is adjusted to 8-12%, and the temperature is increased to 30-40 ℃; regulating the mass ratio of carbon to nitrogen to be 30:1; after staying in the feeding tank for 1 day, the mixture enters an anaerobic fermentation tank, wherein the fermentation temperature is 35+/-2 ℃ and the stay time is 20 days; biogas, biogas slurry and biogas residues generated in the anaerobic process are separated and then respectively enter a product utilization unit 7.

The product utilization unit 7 or process comprises: a device or a step for producing natural gas by purifying biogas; a device or a step for preparing liquid fertilizer by using biogas slurry; a device or a step for producing the granular organic fertilizer by utilizing biogas residues; a device or a step for generating electricity by using methane.

For example, the biogas generated after fermentation enters a biogas purifying unit, H in the biogas is removed by desulfurization and PSA ₂ S and CO ₂ Methane in the biogas can be purified to more than 96%, and then enters CNG (compressed natural gas) pressurizing units for pressurizing and canning, and the methane can be sold and used as new energy. For example, the generated biogas can enter a power generation unit for power generation after desulfurization, dehydration, impurity removal and purification. In addition, the biogas slurry generated after fermentation can enter a biogas slurry after-ripening storage tank, and liquid fertilizer is manufactured after the biogas slurry stays. In addition, the solid content of the dehydrated biogas residue is 30% after the biogas residue is dehydrated by extrusion, and the dehydrated biogas residue is stirred, granulated and dried to prepare the finished granular organic fertilizer. It should be noted that: the anaerobic fermentation and product utilization system of the organic waste can comprise a biodiesel generating device which can be used for treating kitchen waste.

Thus, anaerobic fermentation and product utilization can be achieved according to the present utility model. Specifically, by agitating the sludge in the fermentation tank 2, it is possible to promote the production of methane-based biogas in the tank, which is stored in the liquid upper part of the fermentation tank 2, below the ceiling, or in the gas chamber. The compressed liquid in the gas chamber directly passes through the sewage pipe to reach the biogas slurry storage tank 17 (corresponding to the biogas slurry temporary storage tank shown in fig. 2). In the different process flows represented by the system, the biogas collected by the gas collecting pipe 9 is used for a generator 18 (corresponding to a motor/generator) or an internal combustion engine for generating electricity, and by arranging a heating and stirring unit (comprising a gas conveying pipeline and a gas heating and stirring disc 27) along a central wall which plays a role in spacing the fermentation tank 2 in the fermentation tank 2, the stirring of the sludge in the tank can be realized by directly utilizing the biogas generated by the anaerobic fermentation unit 3 to be sprayed into the fermentation tank 2 without external power. The cooling system in the generator 18 may also circulate thermal energy through hot water pipes to the mixing tank 1 to promote heating and agitation, or in the mixing tank 1 and the fermentation tank 2 to achieve a stirring process of the system.

In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise. Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly, as they may be fixed, removable, or integral, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be. While the utility model has been described with reference to various specific embodiments, it should be understood that numerous changes could be made within the spirit and scope of the inventive concepts described. Accordingly, it is intended that the utility model not be limited to the described embodiments, but that it have the full scope defined by the language of the following claims.

Claims (10)

1. An anaerobic fermentation and product utilization system for organic waste, comprising: an anaerobic fermentation unit (3) having a mixing tank (1) and a fermentation tank (2); a product utilization unit (7) provided with a natural gas generation device and/or an organic fertilizer generation device for treating the biogas, biogas residue and biogas slurry separated from the anaerobic fermentation unit; a gas collection tube (9); -a generator (18), a hot water pipe connected between a cooling system in the generator (18) and the mixing tank (1) and/or the fermentation tank (2), and a heating and stirring unit comprising a gas transfer pipe and a gas heat stirring disc (27), wherein the gas collection pipe (9) is connected to the fermentation tank (2) for feeding collected biogas to the generator (18) for generating electricity, the heat energy of the cooling system in the generator (18) being able to circulate via the hot water pipe to the mixing tank (1) and/or the fermentation tank (2), the system further comprising: an internal combustion engine or a steam turbine (21), wherein the heated coolant in the cooler of the internal combustion engine is led to an air water cooler (20) through a pipeline, the air water cooler (20) is arranged in the mixing tank (1) and/or the fermentation tank (2), a gas/liquid heat exchanger (26) is arranged in connection with the steam turbine (21), the hot waste gas generated by the steam turbine (21) provides heat for the gas/liquid heat exchanger (26), so that the heated gas is provided for a closed air circulation system and is returned to the gas-heat stirring disc (27) through the gas conveying pipeline, the nozzle of the gas-heat stirring disc (27) is positioned in the mixing tank (1) and/or the fermentation tank (2), and the anaerobic fermentation unit (3) further comprises a clarification tank (15), and the clarification tank (15) is led to the mixing tank (1) through a hot water return pipe.

2. Anaerobic fermentation and product utilization system for organic waste according to claim 1, further comprising a hot water return line arranged between the clarifier (15) and the mixing tank (1) for delivering hot water after fermentation in the clarifier (15) to the mixing tank (1) for thawing and warming fermentation raw material.

3. Anaerobic fermentation and product utilization system for organic waste according to claim 1, characterized in that the fermentation tank (2) is connected by means of a solid sewage conduit to a solid-liquid separator (19) arranged in a discharge tank (14) after the clarifier (15); and/or an activated sludge circulation pipeline is arranged between the fermentation tank (2) and the mixing tank (1).

4. An anaerobic fermentation and product utilization system for organic waste according to claim 3, wherein a circulation mechanism is further provided after the solid-liquid separator (19) for circulating part of the liquid treated by the solid-liquid separator (19) into the mixing tank (1) and/or the fermentation tank (2).

5. An anaerobic fermentation and product utilization system for organic waste according to claim 3, wherein a discharge baffle (28) is provided obliquely in the discharge tank (14), the baffle body of which is spaced apart from the bottom of the discharge tank.

6. Anaerobic fermentation and product utilization system for organic waste according to claim 5, characterized in that a solid-liquid separator (19) is arranged in the discharge tank (14), a composting machine (22) or a solid dryer (23) or a fluidized bed dryer (24) is arranged after the solid-liquid separator (19) for treating the organic material discharged from the solid-liquid separator (19), a water condenser (25) is arranged in connection with the fluidized bed dryer (24), and the water condenser (25) is connected to the heating line of the mixing tank (1) and/or the heating line of the fermentation tank (2).

7. Anaerobic fermentation and product utilization system for organic waste according to claim 6, characterized in that the gas/liquid heat exchanger (26) is also connected to the composter (22) or the solids dryer (23).

8. Anaerobic fermentation and product utilization system for organic waste according to claim 1, further comprising a booster fan (29) connected to the gas-heated agitator disk (27).

9. The anaerobic fermentation and product utilization system for organic waste according to claim 1, further comprising a biodiesel production apparatus for treating grease separated from the anaerobic fermentation unit.

10. Anaerobic fermentation and product utilization system for organic waste according to claim 1, characterized in that a biogas storage tank is provided, wherein biogas is heated by the gas/liquid heat exchanger (26) and fed via the gas feed pipe to the gas-heated agitator disk (27), which gas-heated agitator disk (27) is arranged along the central wall of the fermentation vat.

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