Organic waste efficient synchronous co-fermentation and combined heat and power generation technology integration method

Abstract

The invention discloses an organic waste efficient synchronous co-fermentation and combined heat and power generation technology integration method, and relates to the technical field of organic waste treatment, and the method comprises the following steps: S1, ICNR sewage pretreatment; s2, efficient and synchronous co-fermentation; s3, an efficient combined heat and power generation process; and S4, quickly heating the aerobic compost, preserving nitrogen and deodorizing. The organic waste efficient synchronous co-fermentation and combined heat and power generation technology integration method integrates a sewage pretreatment technology, an anaerobic fermentation technology, a combined heat and power generation technology and a sludge aerobic composting technology, and develops an organic waste efficient synchronous co-fermentation and combined heat and power generation method. Advanced technology integrated application and demonstration engineering are carried out in a sewage plant, biogas generated by the organic waste is utilized to generate power for self-use, residual solid waste compost is used for landscaping and agricultural production, and reduction, harmlessness and recycling of organic waste treatment are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of organic waste treatment, and in particular to a method for integrating high-efficiency synchronous co-fermentation and heat and power cogeneration technology of organic waste. Background Art

[0002] Organic waste refers to solid, liquid or gaseous organic items and materials that have lost their original value or have not lost their value but have been discarded or abandoned in production, life and other activities. These wastes contain a large amount of organic substances containing hydrocarbons. According to their sources and properties, they can be further divided into agricultural organic waste (such as crop straw and vines, livestock and poultry manure and aquatic waste, etc.), industrial organic waste (such as high-concentration organic wastewater, organic waste residue, etc.) and municipal organic waste (such as gardening waste, municipal sludge, animal contents of slaughterhouses, kitchen waste, etc.). Since organic waste decomposes slowly in the natural environment, if it is directly discharged or piled up without treatment, it will occupy a lot of land resources and cause pollution to the soil, water and air. In addition, these wastes may contain harmful microorganisms, heavy metals, pathogens, etc., which will pose a threat to the environment and ecosystem. Therefore, organic waste must be treated to reduce its harm. At present, common methods of organic waste treatment include composting, incineration, sanitary landfill, biochemical treatment, etc.

[0003] However, in the actual treatment process, although composting, incineration and other methods can achieve a certain degree of resource utilization, the overall utilization rate is still limited. A large amount of organic waste is still landfilled or discarded. In addition, during the treatment process, if the management is poor or the technology is not up to standard, it may cause secondary pollution, such as harmful gases produced by incineration and leachate produced by landfill.

[0004] Therefore, it is urgent to improve this shortcoming. The present invention studies and improves the existing technology and its shortcomings, and provides an integrated method for efficient synchronous co-fermentation of organic waste and cogeneration technology. Summary of the invention

[0005] The object of the present invention is to provide an integrated method for efficient synchronous co-fermentation of organic waste and cogeneration of heat and power to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: an integrated method of efficient synchronous co-fermentation of organic waste and cogeneration technology, comprising the following steps:

[0007] S1. ICNR sewage pretreatment:

[0008] Considering that too much nitrogen-containing pollutants in wastewater will produce a large amount of ammonia nitrogen through ammonia reaction during the anaerobic reaction of sewage sludge, which will have an adverse effect on the entire sewage treatment and sludge anaerobic fermentation, the wastewater pretreatment is designed to remove some nitrogen elements, which is conducive to the subsequent sewage biogas production and sludge fermentation. Through biological treatment, organic matter is converted into high-value methane gas as much as possible. On this premise, the internal circulating denitrification reactor (ICNR) is developed and applied to wastewater pretreatment;

[0009] S2. Efficient synchronous co-fermentation:

[0010] Relying on sewage treatment plants and based on the form of organic waste, we design a liquid fermentation system for organic wastewater associated with sewage plants, kitchen waste, human and animal feces, etc., and a solid fermentation system for sludge in lake areas, cyanobacteria mud, forestry, straw, etc., to develop an intensive lake organic waste resource utilization system with high treatment efficiency (high organic load), system stability and high energy recovery rate. The anaerobic digestion theory is as follows Figure 3 As shown;

[0011] S3, High-efficiency cogeneration process:

[0012] Relying on sewage treatment plants and organic waste anaerobic fermentation systems, and based on existing gas turbine power generation technology, develop an efficient cogeneration system;

[0013] S4, aerobic composting, rapid temperature rise, nitrogen retention, deodorization:

[0014] Automatically controlled biological composting treatment technology was used to screen microbial strains, agents and conditioners for mixed composting research. By monitoring the changes in conventional indicators, changes in the content of nitrogen in different forms, changes in microbial enzyme activity, changes in NH3 and H2S release during the composting process, the rapid heating, nitrogen retention and deodorization effects of sludge composting with bio-augmentation combined with biochar and bio-augmentation combined with phosphate buffer were studied.

[0015] Furthermore, in step S1, the specific operation of wastewater pretreatment is: using an internal circulation denitrification reactor to simultaneously denitrify and produce biogas for the sewage, reducing the nitrogen content while degrading organic matter in the sewage, and generating methane gas in the process, and continuously improving the plan based on process tests to form an innovative ICNR simultaneous denitrification and biogas production process, explore the optimal process parameters, and formulate the optimal plan for engineering design.

[0016] Furthermore, the internal circulation denitrification reactor integrates the denitrification reaction and the methanogenesis reaction in one reactor, has the function of synchronous denitrification and biogas production, and improves the reaction efficiency of the entire reactor by adding patented devices such as internal reflux, external reflux, multi-layer three-phase separator, gas-water separator, and high-efficiency biological filler;

[0017] The internal circulation denitrification reactor is divided into an upper methanogenic reaction chamber and a lower denitrification reaction chamber through internal circulation and external circulation, and the biomass in the reactor is increased by high-efficiency biological fillers, so that the reactor has simultaneous high-efficiency denitrification and methanogenic performance.

[0018] Furthermore, in step S2, the liquid organic waste fermentation system: adopts anaerobic fermentation and membrane process coupled with methane fermentation technology, screens and constructs dominant microbial strains, studies the intrinsic relationship between different liquid organic waste ratios, microbial strains, temperature and other process parameters and methane production efficiency, and achieves the basic goal of reducing organic waste without affecting the process of the sewage treatment plant, improves the methane conversion efficiency, and enhances the energy performance of the system;

[0019] The technical route of the liquid organic waste fermentation system: high-concentration organic wastewater from the sewage treatment plant enters the anaerobic bioreactor, and after three stages of hydrolysis-acidification-methane production, the wastewater enters the membrane reactor, where the activated sludge and macromolecular organic matter in the wastewater are filtered out and transferred to the next process of the water treatment process. Part of the sludge is collected by sedimentation for solid-state fermentation, and part of the biogas produced by the anaerobic bioreactor is passed into the membrane reactor to prevent membrane clogging. The intercepted incompletely fermented wastewater (mainly macromolecular organic matter) is returned to the bioreactor, and the biogas is recycled through secondary fermentation.

[0020] Furthermore, in step S2, the solid organic waste fermentation system: studying the co-fermentation and decomposition of residual sludge in the sewage treatment plant area and the recovered lake solid organic matter under certain moisture, temperature and anaerobic conditions by microorganisms, and achieving efficient conversion to methane by adjusting and optimizing the addition ratio of sludge, cyanobacteria mud, forestry, and straw, and finally activating the energy potential of lake organic waste;

[0021] The technical route of the solid organic waste fermentation system: the residual sludge from the sewage treatment process enters the oval digester through the sludge thickening tank-mud-water heat exchanger. At the same time, the blue algae mud, forestry, and straw that have been crushed and chemically pretreated are solidly stored in the silo to reduce oxygen and control the water content. After that, the inoculum and organic waste are mixed in the feed tank and enter the oval digester to co-ferment with the residual sludge to produce biogas. The fermented biogas is recycled to the water treatment anaerobic process for deep fermentation, and the remaining residue is recycled for composting.

[0022] Furthermore, in step S3, the research content of system development includes: studying the material flow and energy flow in biogas power generation, analyzing the energy conversion rate and terminal effective utilization rate of different heat exchange links through material balance Gantt chart, studying the energy absorption-storage-utilization methods under different temperature ranges on the energy efficiency of potential utilization modes, and studying the energy demand under different seasonal scenarios. Without affecting the power generation efficiency of the original system, the efficient coordinated output of thermal-electric energy is achieved, and the amount of energy purchased for sewage and organic matter treatment is reduced.

[0023] Furthermore, in step S3, the cogeneration system: the gas turbine uses biogas and city natural gas as raw materials to drive the generator to generate electricity, the ultra-high temperature section of the outlet flue gas above 1000°C continues to be used to drive the generator to generate electricity, the high temperature section of 500°C to 1000°C drives the waste heat boiler or waste heat lithium bromide for cooling and heating, the medium temperature section of 100°C to 500°C is used to provide domestic hot water, the low temperature section of 30°C to 100°C is used for anaerobic fermentation insulation and heating, and the remaining waste heat that can no longer be used is discharged into the air, and the whole process realizes the cascade utilization of energy; the cascade utilization of energy in the cogeneration system can greatly improve the energy utilization efficiency, while reducing the emission of carbon compounds and harmful gases.

[0024] Furthermore, in step S4, the sludge composting technology process: under aerobic conditions, through the life activities of aerobic microorganisms, the unstable organic matter in the pile is converted into relatively stable organic matter, while reducing the content of volatile organic matter and eliminating odor.

[0025] Furthermore, in step S4, a door is left on one side of the composting device to facilitate sampling and turning over of materials, and the bottom aeration chamber is connected to a vortex centrifugal fan, and the fan pressure is 9.0 kPa and the flow rate is 60.0 m 3 / h, and the aeration cycle is intermittently controlled by the DH48s digital display time relay.

[0026] Furthermore, during the composting process of the composting device, continuous variable frequency aeration control is better than interval aeration control. The smaller the interval frequency, the more conducive it is to the smooth progress of composting. Too long an interval or insufficient aeration air volume will cause anaerobic pile body. Too large aeration air volume will increase the release of ammonia. Appropriate aeration air volume should be controlled. Since a large amount of water vapor and by-products are discharged during the high-temperature turning process, which also causes fluctuations in the pile temperature, it is selected to loosen and mix the pile body through turning operation under low temperature conditions, and at the same time supplement oxygen and discharge by-products to accelerate the composting process, and the turning frequency should be properly controlled and does not need to be too high.

[0027] The present invention provides an integrated method for efficient synchronous co-fermentation of organic waste and cogeneration of heat and power, which has the following beneficial effects:

[0028] The present invention integrates sewage pretreatment technology, anaerobic fermentation technology, cogeneration technology and sludge aerobic composting technology, develops a method for efficient synchronous co-fermentation and cogeneration of organic waste, and implements advanced technology integrated application and demonstration projects in sewage treatment plants, uses biogas generated by organic waste to generate electricity for self-use, and the remaining solid waste compost is used for landscaping and agricultural production, thus achieving the reduction, harmlessness and resource utilization of organic waste treatment;

[0029] 1) The ICNR simultaneous denitrification and biogas production process was designed. Compared with the traditional biological denitrification and anaerobic reactor processes, the denitrification reaction and the methanogenesis reaction were integrated into one reactor. The reaction efficiency of the entire reactor was improved by adding patented devices such as internal reflux, external reflux, multi-layer three-phase separator, gas-water separator, and high-efficiency biological filler.

[0030] 2) Based on the form of organic waste, a liquid organic waste fermentation system and a solid organic waste fermentation system are designed to achieve efficient and synchronous co-fermentation of organic waste;

[0031] 3) An efficient cogeneration system has been developed. Its cascaded energy utilization can greatly improve energy efficiency while reducing carbonized matter and harmful gas emissions. It can also achieve efficient synergistic output of heat and electricity without affecting the power generation efficiency of the original system, thereby reducing the outsourcing of energy for sewage and organic matter treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of a biogas cogeneration system for integrating the high-efficiency synchronous co-fermentation and cogeneration technology of organic wastes according to the present invention;

[0033] Figure 2 The ICNR process schematic diagram of the integrated method of efficient synchronous co-fermentation of organic waste and cogeneration technology of the present invention;

[0034] Figure 3 The schematic diagram of the anaerobic digestion theory of the integrated method of efficient synchronous co-fermentation and cogeneration technology of organic waste of the present invention;

[0035] Figure 4 A schematic diagram of the research and development route of aerobic composting rapid temperature rise, nitrogen preservation and deodorization technology for the integrated method of efficient synchronous co-fermentation and cogeneration technology of organic waste of the present invention;

[0036] Figure 5 It is a schematic diagram of a liquid organic waste fermentation system of the integrated method of organic waste efficient synchronous co-fermentation and cogeneration technology of the present invention;

[0037] Figure 6 A schematic diagram of a solid organic waste fermentation system for an integrated method of efficient synchronous co-fermentation of organic waste and cogeneration of heat and power technology of the present invention;

[0038] Figure 7 A schematic diagram of a cogeneration system device for the integrated method of efficient synchronous co-fermentation of organic waste and cogeneration technology of the present invention;

[0039] Figure 8 A schematic diagram of the energy conversion and utilization pathway of cogeneration of heat and power in the integrated method of efficient synchronous co-fermentation of organic waste and cogeneration technology of the present invention;

[0040] Fig. 9 It is a schematic diagram of the process flow of the sludge composting technology of the integrated method of the organic waste efficient synchronous co-fermentation and cogeneration technology of the present invention;

[0041] Fig.10 A schematic diagram of a composting device for the integrated method of efficient synchronous co-fermentation and cogeneration of organic waste according to the present invention;

[0042] Fig.11 This is a physical picture of the composting device of the integrated method of efficient synchronous co-fermentation and cogeneration technology of organic waste of the present invention. DETAILED DESCRIPTION

[0043] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0044] like Figure 1-Figure 11 As shown, the integrated method of efficient synchronous co-fermentation of organic waste and cogeneration technology includes the following steps:

[0045] S1. ICNR sewage pretreatment:

[0046] Considering that excessive nitrogen-containing pollutants in wastewater will produce a large amount of ammonia nitrogen through ammonia reaction during the anaerobic reaction of sewage sludge, which will have an adverse effect on the entire sewage treatment and sludge anaerobic fermentation, the wastewater pretreatment is designed to remove some nitrogen elements, which is conducive to the subsequent sewage biogas production and sludge fermentation. Through biological treatment, organic matter is converted into high-value methane gas as much as possible. Under this premise, the internal circulation denitrification reactor (ICNR) is developed and applied to wastewater pretreatment;

[0047] In this embodiment, the specific operation of wastewater pretreatment is: using an internal circulation denitrification reactor to simultaneously denitrify and produce biogas on the sewage, reducing the nitrogen content while degrading organic matter in the sewage, and generating methane gas in the process, and continuously improving the scheme according to process tests to form an innovative ICNR simultaneous denitrification and biogas production process (see Figure 2 ), explore the best process parameters and formulate the best solution for engineering design;

[0048] The internal circulation denitrification reactor integrates the denitrification reaction and the methanogenesis reaction in one reactor, and has the function of simultaneous denitrification and biogas production. The reaction efficiency of the entire reactor is improved by adding patented devices such as internal reflux, external reflux, multi-layer three-phase separator, gas-water separator, and high-efficiency biological filler. The internal circulation denitrification reactor is divided into an upper methanogenesis reaction chamber and a lower denitrification reaction chamber through internal and external circulation, and the biomass in the reactor is increased by high-efficiency biological fillers, so that the reactor has simultaneous high-efficiency denitrification and methanogenesis performance.

[0049] S2. Efficient synchronous co-fermentation:

[0050] Relying on sewage treatment plants and based on the form of organic waste, we design a liquid fermentation system for organic wastewater associated with sewage plants, kitchen waste, human and animal feces, etc., and a solid fermentation system for sludge in lake areas, cyanobacteria mud, forestry, straw, etc., to develop an intensive lake organic waste resource utilization system with high treatment efficiency (high organic load), system stability and high energy recovery rate. The anaerobic digestion theory is as follows Figure 3 As shown;

[0051] In this embodiment, the liquid organic waste fermentation system is as follows Figure 5 As shown in the figure, high-concentration organic wastewater from a sewage treatment plant enters the anaerobic bioreactor, and after three stages of hydrolysis-acidification-methane production, the wastewater enters the membrane reactor, where the activated sludge and macromolecular organic matter in the wastewater are filtered out and transferred to the next process of the water treatment process. Part of the sludge is collected for solid-state fermentation, and part of the biogas produced by the anaerobic bioreactor is passed into the membrane reactor to prevent membrane clogging. The intercepted incompletely fermented wastewater (mainly macromolecular organic matter) is returned to the bioreactor, and the biogas is recycled through secondary fermentation.

[0052] In this embodiment, the solid organic waste fermentation system is as follows Figure 6 As shown, the excess sludge from the sewage treatment process enters the oval digester through the sludge concentration tank-mud-water heat exchanger. At the same time, the blue algae mud, forestry, and straw that have been crushed and chemically pretreated are solidly reduced in oxygen and the water content is controlled in the silo. After that, the inoculum and organic waste are mixed in the feed tank and enter the oval digester to co-ferment with the excess sludge to produce biogas. The fermented biogas is recycled to the water treatment anaerobic process for deep fermentation, and the remaining residue is recycled for composting.

[0053] S3, High-efficiency cogeneration process:

[0054] Relying on the sewage treatment plant and the anaerobic fermentation system of organic waste, based on the existing gas turbine power generation technology, develop an efficient cogeneration system; the research content of system development includes: studying the material flow and energy flow in biogas power generation, analyzing the energy conversion rate and terminal effective utilization rate of different heat exchange links through the material balance Gantt chart, studying the energy absorption-storage-utilization method under different temperature ranges on the energy efficiency of potential utilization modes, and studying the energy demand under different seasonal scenarios. Under the condition of not affecting the power generation efficiency of the original system, realize the efficient coordinated output of heat-electricity energy and reduce the outsourcing of sewage and organic matter treatment energy;

[0055] In this embodiment, the cogeneration system is as follows Figure 7 As shown in the figure, the gas turbine uses biogas and city natural gas as raw materials to drive the generator to generate electricity. The ultra-high temperature section of the outlet flue gas above 1000℃ is continued to drive the generator to generate electricity. The high temperature section of 500℃ to 1000℃ drives the waste heat boiler or waste heat lithium bromide for cooling and heating. The medium temperature section of 100℃ to 500℃ is used to provide domestic hot water. The low temperature section of 30℃ to 100℃ is used for anaerobic fermentation, heat preservation and heating. The rest of the waste heat that can no longer be used is discharged into the air. The whole process realizes the cascade utilization of energy. For details, see Figure 8 ; The energy cascade utilization of the combined heat and power system can greatly improve energy utilization efficiency and reduce carbon dioxide and harmful gas emissions;

[0056] S4, aerobic composting, rapid temperature rise, nitrogen retention, deodorization:

[0057] Using automatic control biological composting treatment technology, we screened microbial strains, agents and conditioners for mixed composting research. By monitoring the changes in conventional indicators, changes in nitrogen content in different forms, changes in microbial enzyme activity, changes in NH3 and H2S release during the composting process, we studied the rapid heating, nitrogen retention and deodorization effects of sludge composting with bio-augmentation combined with biochar and bio-augmentation combined with phosphate buffer. The research and development routes are as follows: Figure 4 As shown;

[0058] In this embodiment, the sludge composting technology process is as follows Fig. 9 As shown: Under aerobic conditions, the unstable organic matter in the pile is converted into relatively stable organic matter through the life activities of aerobic microorganisms, while the content of volatile organic matter is reduced and odor is eliminated;

[0059] Composting equipment such as Figure 10-11 As shown, a door is left on one side of the tank for easy sampling and turning of materials. The bottom aeration chamber is connected to a vortex centrifugal fan, and the fan pressure is 9.0 kPa and the flow rate is 60.0 m 3 / h, and the aeration cycle is intermittently controlled by the DH48s digital display time relay; and in the composting process, continuous variable frequency aeration control is better than interval aeration control. The smaller the interval frequency, the more conducive to the smooth progress of composting. Too long intervals or insufficient aeration air volume will cause anaerobic piles. Too large aeration air volume will increase the release of ammonia, and appropriate aeration air volume should be controlled; since a large amount of water vapor and by-products are discharged during the high-temperature turning process, which also causes fluctuations in the pile temperature, it is chosen to loosen and mix the pile through turning operations under low temperature conditions, and at the same time supplement oxygen and discharge by-products to accelerate the composting process, and the turning frequency should be properly controlled, and it does not need to be too high.

[0060] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. An integrated method for efficient simultaneous co-fermentation of organic waste and cogeneration of heat and power, characterized in that: The following steps are involved: S1. ICNR sewage pretreatment: Design wastewater pretreatment to remove some nitrogen, convert organic matter into methane gas through biological treatment, and on this premise, develop an internal circulation denitrification reactor and apply it to wastewater pretreatment; S2. Efficient synchronous co-fermentation: Relying on sewage treatment plants and based on the form of organic waste, we design a liquid and solid organic waste fermentation system that is parasitic on the water treatment process, and develop an intensive lake organic waste resource utilization system; S3, High-efficiency cogeneration process: Relying on sewage treatment plants and organic waste anaerobic fermentation systems, and based on existing gas turbine power generation technology, develop an efficient cogeneration system; S4, aerobic composting, rapid temperature rise, nitrogen retention, deodorization: Automatically controlled biocomposting technology was used to screen microbial strains, agents and conditioners for mixed composting research. By monitoring the composting process, the rapid heating, nitrogen retention and deodorization effects of sludge composting with bio-augmentation combined with biochar and bio-augmentation combined with phosphate buffer were studied.

2. The method for integrating high-efficiency synchronous co-fermentation and cogeneration technology of organic waste according to claim 1, characterized in that: In step S1, the specific operation of wastewater pretreatment is: use an internal circulation denitrification reactor to simultaneously denitrify and produce biogas for sewage, reduce the nitrogen content while degrading organic matter in sewage and producing methane gas, and continuously improve the plan based on process tests to form an innovative ICNR simultaneous denitrification and biogas production process, explore the best process parameters, and formulate the best plan for engineering design.

3. The method for integrating high-efficiency synchronous co-fermentation and cogeneration technology of organic waste according to claim 2, characterized in that: The internal circulation denitrification reactor integrates the denitrification reaction and the methanogenesis reaction in one reactor, and is additionally provided with an internal reflux, an external reflux, a multi-layer three-phase separator, a gas-water separator, and a high-efficiency biological filler device. Through the internal circulation and the external circulation, the reactor is divided into an upper methanogenesis reaction chamber and a lower denitrification reaction chamber. The biomass in the reactor is increased by the high-efficiency biological filler, so that the reactor has the performance of simultaneously high-efficiency denitrification and methanogenesis.

4. The method for integrating high-efficiency synchronous co-fermentation and cogeneration technology of organic waste according to claim 1, characterized in that: In step S2, the liquid organic waste fermentation system: the organic wastewater enters the anaerobic bioreactor, undergoes three stages of hydrolysis-acidification-methane production, and then enters the membrane reactor to filter out the activated sludge and macromolecular organic matter in the wastewater, and then transfers to the next process of the water treatment process. Part of the sludge is settled and collected for solid-state fermentation, and part of the biogas produced by the anaerobic bioreactor is passed into the membrane reactor to prevent membrane clogging. The intercepted incompletely fermented wastewater flows back to the bioreactor, and the biogas is recycled through secondary fermentation.

5. The method for integrating high-efficiency synchronous co-fermentation and cogeneration technology of organic waste according to claim 1, characterized in that: In the step S2, the solid organic waste fermentation system: the residual sludge from the sewage treatment process enters the oval digester through the sludge concentration tank-mud-water heat exchanger. At the same time, the blue algae mud, forestry, and straw after crushing and chemical pretreatment are solidly reduced in oxygen and the water content is controlled through the silage tank. Then, the inoculum and organic waste are mixed in a feed tank and enter the oval digester to co-ferment and produce biogas with the residual sludge. The fermented biogas is recycled to the water treatment anaerobic process for deep fermentation, and the remaining residue is recycled for composting.

6. The method for integrating high-efficiency synchronous co-fermentation and cogeneration technology of organic waste according to claim 1, characterized in that: In step S3, the research content of system development includes: studying the material flow and energy flow in biogas power generation, analyzing the energy conversion rate and terminal effective utilization rate of different heat exchange links through material balance Gantt chart, studying the energy efficiency impact of energy absorption-storage-utilization methods under different temperature ranges on potential utilization modes, and studying the energy demand under different seasonal scenarios. Under the condition of not affecting the power generation efficiency of the original system, the efficient coordinated output of thermal-electric energy is achieved, and the purchase of energy for sewage and organic matter treatment is reduced.

7. The method for integrating high-efficiency synchronous co-fermentation and cogeneration technology of organic waste according to claim 1, characterized in that: In step S3, the cogeneration system: the gas turbine uses biogas and city natural gas as raw materials to drive the generator to generate electricity, the ultra-high temperature section of the outlet flue gas above 1000°C is continuously used to drive the generator to generate electricity, the high temperature section of 500°C to 1000°C drives the waste heat boiler or waste heat lithium bromide for cooling and heating, the medium temperature section of 100°C to 500°C is used to provide domestic hot water, the low temperature section of 30°C to 100°C is used for anaerobic fermentation insulation and heating, and the remaining waste heat that can no longer be used is discharged into the air.

8. The method for integrating high-efficiency synchronous co-fermentation and cogeneration technology of organic waste according to claim 1, characterized in that: In step S4, the sludge composting technology process: under aerobic conditions, the unstable organic matter in the pile is converted into stable organic matter through the life activities of aerobic microorganisms, while reducing the content of volatile organic matter and eliminating odor.

9. The method for integrating high-efficiency synchronous co-fermentation and cogeneration technology of organic waste according to claim 1, characterized in that: In step S4, the aeration chamber at the bottom of the composting device is connected to a vortex centrifugal fan, and the fan pressure is 9.0 kPa and the flow rate is 60.0 m 3 / h, and the aeration cycle is intermittently controlled by the DH48s digital display time relay.

10. The method for integrating high-efficiency synchronous co-fermentation and cogeneration technology of organic waste according to claim 9, characterized in that: During the composting process of the composting device, continuous variable frequency aeration control is better than interval aeration control, and the pile is loosened and mixed through turning and throwing operations under low temperature conditions.

Images