A distributed community kitchen waste-waste on-site disposal and recycling system and method

Abstract

The present invention relates to the field of waste and garbage treatment, in particular to a system and method for coupling treatment of kitchen waste, green waste, domestic sewage and wastewater in a community. The system is divided into three parts: a restaurant waste treatment subsystem, a kitchen waste treatment subsystem and a wastewater recycling subsystem. The system focuses on solving the problems of easy decay and deterioration of kitchen waste and high transportation costs. It classifies kitchen waste according to its different characteristics, adopts a local disposal method that is suitable for it, and considers the graded reuse treatment of domestic sewage at the same time. It couples the kitchen waste treatment system with the wastewater treatment system for secondary utilization of water resources, fully utilizes waste to achieve resource recycling and reuse, improves the utilization efficiency of renewable resources in the community, greatly reduces the transportation energy consumption of off-site disposal, and builds a green, environmentally friendly, low-carbon emission reduction community.

Description

Technical Field

[0001] The present invention relates to the field of waste treatment, and in particular to a system and method for coupling treatment of kitchen waste, green waste, domestic sewage and wastewater in a community. Background Art

[0002] The waste in the community includes black water from flushing toilets, domestic wastewater, restaurant waste, kitchen waste, and green waste, etc., and the proportion of restaurant waste in my country's domestic waste is relatively high and difficult to handle. At present, there are a series of problems in the treatment of community waste:

[0003] 1. With the implementation of garbage classification, the labor cost and collection and transportation cost of garbage classification services in the community have increased significantly, and the additional fees paid by residents for garbage classification and collection and transportation have also increased accordingly.

[0004] 2. The composition of kitchen waste is complex. It is not only difficult to store and transport, but also easy to rot and deteriorate, and emit odor.

[0005] 3. Restaurant waste can be divided into catering waste and kitchen waste. Catering waste is generally concentrated in canteens, restaurants and other places in the community, with the characteristics of large individual production and concentrated quantity; while kitchen waste is the kitchen waste leftovers of every household, with the characteristics of small individual production, large quantity and large overall production. The uneven distribution of catering waste and kitchen waste in time, space and quantity makes it difficult to uniformly recycle and treat them.

[0006] 4. During the anaerobic digestion process, kitchen waste is prone to organic acid accumulation and acidification, which affects gas production efficiency due to its unstable physical and chemical composition and the inability of the carbon-nitrogen ratio to meet the growth conditions of anaerobic bacteria. External carbon and nitrogen sources need to be added to adjust the carbon-nitrogen ratio.

[0007] 5. The domestic water shortage problem is serious. Most of the high-quality wastewater such as bathing and washing wastewater in the community is directly discharged into the municipal pipe network without being fully reused, resulting in a waste of water resources. However, the current wastewater recycling system has a low COD content in the wastewater, which leads to a decrease in biochemical treatment efficiency and an increase in cost.

[0008] 6. Sewage and wastewater generated in the community are directly discharged into the municipal pipeline, while domestic garbage and green waste are outsourced for collection and transportation. The waste resources contained in the sewage and garbage are not classified, graded and recycled, resulting in a waste of resources, which is inconsistent with the current advocacy of building a green, environmentally friendly and low-carbon community. Summary of the invention

[0009] In view of the above shortcomings, the present invention proposes a system and method for on-site resource recycling of community sewage and kitchen waste.

[0010] The present invention is achieved through the following technical solutions:

[0011] A distributed community restaurant kitchen waste and sewage waste on-site disposal and recycling system, which consists of three parts: a restaurant waste treatment subsystem, a kitchen waste treatment subsystem and a wastewater recycling subsystem. The restaurant waste treatment subsystem is composed of an integrated aerobic fermentation device for restaurant waste, and the integrated device includes a dehydration device, an oil-water separation device, a high-efficiency aerobic fermentation device and an exhaust gas purification device. The kitchen waste treatment subsystem includes a household kitchen waste crusher, a green waste crusher, a regulating tank 1, an upflow septic tank, a diversion device, a biogas residue dehydration device, a biogas purification device, a gas wall-mounted boiler, and a natural gas supplement device. The wastewater recycling subsystem includes a rainwater storage tank, a regulating tank 2, a wastewater integrated treatment device, and a reclaimed water storage tank;

[0012] The catering waste generated in the canteen and restaurant is uniformly placed in the catering waste aerobic fermentation integrated equipment for on-site disposal. The process includes sending the catering waste to the dehydration device for solid-liquid separation, and the liquid is then deoiled by the oil-water separation device and discharged into the regulating tank 2 in the wastewater recycling subsystem for further treatment. The oil in the oil-water separation device is collected and processed to make biodiesel, and the solid is sent to the high-efficiency aerobic fermentation device for rapid aerobic fermentation for decomposition. The generated gas is purified by the tail gas purification device and then discharged, and the remaining residue is collected and processed to make organic fertilizer;

[0013] Kitchen waste is crushed into fine particles by a household kitchen waste crusher and then discharged into regulating tank one; black water for flushing toilets enters regulating tank one through a drainage pipe; green waste in the community is crushed by a green waste crusher and then discharged into regulating tank one, and the mixture is homogenized in regulating tank one and then discharged into an upflow septic tank for anaerobic fermentation. The gas produced by anaerobic fermentation is discharged from the upper part of the septic tank, and is desulfurized, deCO2-removed and dehydrated by a biogas purification device before being introduced into a gas-fired wall-mounted boiler. At the same time, the amount of biogas and the oxygen content of the gas are monitored. When the amount of biogas or the oxygen content of the gas is insufficient, the natural gas supplement device supplements natural gas and air. After the supernatant flowing out of the upflow septic tank is diverted by a diversion device, a part of it enters regulating tank two of the wastewater recycling subsystem for further treatment, and the rest is refluxed into the septic tank as reflux liquid to promote the stirring of sludge at the bottom of the septic tank; the residue in the septic tank is discharged from the bottom, and the remaining residue is collected and processed into organic fertilizer after being dehydrated by a biogas residue dehydration device;

[0014] Bathing drainage and washing drainage are discharged into regulating tank 2 through drainage pipes; rainwater is collected in rainwater storage tanks and discharged into regulating tank 2; catering waste is deoiled by oil-water separation device and discharged into regulating tank 2; the mixture of kitchen waste is treated in an upflow septic tank and discharged into regulating tank 2. The above wastewater is fully and evenly mixed in regulating tank 2 and then discharged into the integrated wastewater treatment device for treatment. The treated water that meets the standards is called grey water, which is discharged into the grey water storage tank for standby use and is used for fire fighting, road washing, greening irrigation, and toilet flushing. Excess grey water is discharged from the grey water storage tank into the municipal pipeline through the overflow pipe. Similarly, when the rainfall is heavy, excess rainwater is discharged from the rainwater storage tank into the municipal pipeline through the overflow pipe.

[0015] A method for on-site disposal and recycling of kitchen waste in a distributed community, the method comprising three systems: a catering waste treatment subsystem, a kitchen waste treatment subsystem and a wastewater recycling subsystem, the catering waste treatment subsystem being composed of an integrated catering waste aerobic fermentation device, the integrated device comprising a dehydration device, an oil-water separation device, a high-efficiency aerobic fermentation device and an exhaust gas purification device, the kitchen waste treatment subsystem comprising a household kitchen waste crusher, a green waste crusher, a regulating tank 1, an upflow septic tank, a diversion device, a biogas residue dehydration device, a biogas purification device, a gas-fired wall-mounted boiler and a natural gas supplement device, the wastewater recycling subsystem comprising a rainwater storage tank, a regulating tank 2, an integrated wastewater treatment device and a reclaimed water storage tank;

[0016] The catering waste generated in the canteen and restaurant is uniformly placed in the catering waste aerobic fermentation integrated equipment for on-site disposal. The process includes sending the catering waste to the dehydration device for solid-liquid separation, and the liquid is then deoiled by the oil-water separation device and discharged into the regulating tank 2 in the wastewater recycling subsystem for further treatment. The oil in the oil-water separation device is collected and processed to make biodiesel, and the solid is sent to the high-efficiency aerobic fermentation device for rapid aerobic fermentation for decomposition. The generated gas is purified by the tail gas purification device and then discharged, and the remaining residue is collected and processed to make organic fertilizer;

[0017] Kitchen waste is crushed into fine particles by a household kitchen waste crusher and then discharged into regulating tank one; black water for flushing toilets enters regulating tank one through a drainage pipe; green waste in the community is crushed by a green waste crusher and then discharged into regulating tank one, and the mixture is homogenized in regulating tank one and then discharged into an upflow septic tank for anaerobic fermentation. The gas produced by anaerobic fermentation is discharged from the upper part of the septic tank, and is desulfurized, deCO2-removed and dehydrated by a biogas purification device before being introduced into a gas-fired wall-mounted boiler. At the same time, the amount of biogas and the oxygen content of the gas are monitored. When the amount of biogas or the oxygen content of the gas is insufficient, the natural gas supplement device supplements natural gas and air. After the supernatant flowing out of the upflow septic tank is diverted by a diversion device, a part of it enters regulating tank two of the wastewater recycling subsystem for further treatment, and the rest is refluxed into the septic tank as reflux liquid to promote the stirring of sludge at the bottom of the septic tank; the residue in the septic tank is discharged from the bottom, and the remaining residue is collected and processed into organic fertilizer after being dehydrated by a biogas residue dehydration device;

[0018] Bathing drainage and washing drainage are discharged into regulating tank 2 through drainage pipes; rainwater is collected in rainwater storage tanks and discharged into regulating tank 2; catering waste is deoiled by oil-water separation device and discharged into regulating tank 2; the mixture of kitchen waste is treated in an upflow septic tank and discharged into regulating tank 2. The above wastewater is fully and evenly mixed in regulating tank 2 and then discharged into the integrated wastewater treatment device for treatment. The treated water that meets the standards is called grey water, which is discharged into the grey water storage tank for standby use and is used for fire fighting, road washing, greening irrigation, and toilet flushing. Excess grey water is discharged from the grey water storage tank into the municipal pipeline through the overflow pipe. Similarly, when the rainfall is heavy, excess rainwater is discharged from the rainwater storage tank into the municipal pipeline through the overflow pipe.

[0019] The present invention realizes the secondary utilization of potential discarded resources in the community through a distributed community-level systematic comprehensive treatment plan for restaurant and kitchen waste and sewage waste, converts restaurant and kitchen waste into biodiesel, organic fertilizer, biogas and other resources, and cooperates with the wastewater regeneration system to realize the secondary utilization of community water resources, improve resource conversion efficiency, reduce environmental pollution and environmental hazards caused by transportation, and build a new green, low-carbon and environmentally friendly community. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a system flow chart of the present invention.

[0021] Figure 2 It is a system process diagram of the present invention.

[0022] Figure 3 This is the resource flow diagram of the present invention. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. The following embodiments are merely examples for specific implementation of the present invention, rather than limitations of the present invention.

[0024] like Figure 1 As shown, a distributed community restaurant kitchen waste and sewage on-site disposal and recycling system consists of three parts: a catering waste treatment subsystem, a kitchen waste treatment subsystem and a wastewater recycling subsystem. The catering waste treatment subsystem is composed of an integrated aerobic fermentation device for catering waste, and the integrated equipment includes a dehydration device 03, an oil-water separation device 04, a high-efficiency aerobic fermentation device 05 and an exhaust gas purification device 06. The kitchen waste treatment subsystem includes a household kitchen waste crusher 15, a green waste crusher 18, a regulating tank 19, an upflow septic tank 20, a diversion device 21, a biogas residue dehydration device 22, a biogas purification device 23, a gas wall-mounted boiler 24, and a natural gas supplement device 25. The wastewater recycling subsystem includes a rainwater storage tank 11, a regulating tank 2 12, a wastewater integrated treatment device 13, and a reclaimed water storage tank 14.

[0025] The catering waste 02 generated in canteens and restaurants 01 with high salt and oil content and large and concentrated production volume are uniformly placed in an integrated catering waste aerobic fermentation equipment for on-site disposal. The process includes sending the catering waste 02 to a dehydration device 03 for solid-liquid separation, the liquid is then deoiled by an oil-water separation device 04 and discharged into a regulating tank 2 12 in the wastewater recycling subsystem for further treatment, the oil in the oil-water separation device 04 is collected and processed to produce biodiesel 26, the solid is sent to a high-efficiency aerobic fermentation device 05 for rapid aerobic fermentation for decomposition, the generated gas is purified by an exhaust gas purification device 06 and then discharged, and the remaining residue is collected and processed to produce organic fertilizer 07.

[0026] The kitchen waste is crushed into fine particles (particle size is less than 10mm) by a household kitchen waste crusher 15 and then discharged into a regulating tank 19; the black water 16 for flushing toilets enters the regulating tank 19 through a drainage pipe; the green waste 17 in the community is crushed by a green waste crusher 18 and then discharged into the regulating tank 19. The mixture is homogenized in the regulating tank 19 and then discharged into an upflow septic tank 20 for anaerobic fermentation. The gas produced by the anaerobic fermentation is discharged from the upper part of the septic tank, and is desulfurized, deCO2-dehydrated and then introduced into the gas by a biogas purification device 23. In the wall-mounted boiler 24, the amount of biogas and the oxygen content of the gas are monitored at the same time. When the amount of biogas or the oxygen content of the gas is insufficient, the natural gas supplement device 25 supplements the natural gas and air. After the supernatant flowing out of the upflow septic tank is diverted by the diversion device 21, a part of it enters the regulating tank 2 12 of the wastewater recycling subsystem for further treatment, and the rest flows back into the septic tank as reflux liquid to promote the stirring of the sludge at the bottom of the septic tank; the residue in the septic tank is discharged from the bottom, and the remaining residue is collected and processed into organic fertilizer after dehydration by the biogas residue dehydration device 22.

[0027] Bathing drainage 09 and washbasin drainage 10 are discharged into regulating tank 2 12 through drainage pipes; rainwater is collected by rainwater storage tank 11 and discharged into regulating tank 2 12; catering garbage is deoiled by oil-water separation device 04 and discharged into regulating tank 2 12; the kitchen waste mixture is treated in upflow septic tank 20 and discharged into regulating tank 2 12. The above wastewater is fully and evenly mixed in regulating tank 2 12 and then discharged into integrated wastewater treatment device 13 for treatment. The treated water that meets the standards is called grey water, which is discharged into grey water storage tank 14 for standby use, and is used for fire fighting water, road washing, greening irrigation, and toilet flushing 28. Excess grey water is discharged from grey water storage tank 14 into municipal pipeline 27 through overflow pipe. Similarly, when the rainfall is large, excess rainwater is discharged from the overflow pipe of rainwater storage tank 11 into municipal pipeline 27.

[0028] like Figure 2 The present invention is divided into three processing subsystems. In the catering waste processing subsystem, the catering waste collected from the canteen and the restaurant is placed in the dehydration device 04. After centrifugal dehydration, the liquid is discharged into the oil-water separation device 05 for oil-water separation, and the grease is discharged into the grease barrel. The deoiled liquid is sent to the regulating tank 12 of the wastewater recycling subsystem through a pipeline; the solid part of the catering waste is sent to the high-efficiency aerobic fermentation device 06 for on-site consumption, and the tail gas generated during the treatment process is purified by the tail gas purification device 07 and then discharged. The residue in the high-efficiency aerobic fermentation device 06 is regularly transported out and made into organic fertilizer for community greening.

[0029] In the kitchen waste treatment subsystem, kitchen waste, fecal black water, and green waste are discharged into the regulating tank 19 through pipes for homogenization and then discharged into the upflow septic tank 20 at a certain flow rate. Solids are deposited in the septic tank for anaerobic digestion and decomposition. The supernatant enters the diversion device 21 from the septic tank outlet pipe, part of which is returned to the septic tank along the diversion branch pipe as reflux liquid, and the remaining supernatant is discharged into the regulating tank 12 of the wastewater recycling subsystem; hot water coils are arranged around the septic tank wall to maintain Anaerobic digestion reaction temperature, the biogas produced by anaerobic digestion in the septic tank is separated by the three-phase separation device in the tank and enters the biogas purification device 23 to remove sulfide, carbon dioxide and water in the biogas, and then passes into the gas wall-mounted boiler 24 to heat the circulating hot water in the hot water coil. Since the biogas production is unstable, supplementary natural gas is introduced into the gas wall-mounted boiler 24 as supplementary fuel for heating; the deposited sludge in the septic tank is regularly extracted and dehydrated by the sludge dehydration device 22 to make organic fertilizer for community greening.

[0030] In the wastewater recycling subsystem, in addition to the supernatant of the above two subsystems flowing into the regulating tank 2 12, the high-quality miscellaneous drainage such as bathing drainage and washing drainage in the residential area and the rainwater in the rainwater storage tank 11 are all discharged into the regulating tank 2 12 through pipes. The liquid in the tank is stirred and fully mixed by a stirring pump and then enters the integrated wastewater treatment device 13 for treatment. The treated grey water that meets the standards enters the grey water storage tank 14 for standby use, and the excess grey water is discharged into the municipal pipeline 27 through the overflow pipe.

[0031] like Figure 3 Through the distributed community-level systematic comprehensive treatment plan for restaurant and kitchen waste and sewage waste, the potential waste resources in the community are reused, and restaurant waste and kitchen waste are converted into biodiesel, organic fertilizer, biogas and other resources. In addition, the wastewater regeneration system is used to realize the secondary utilization of community water resources, improve resource conversion efficiency, reduce environmental pollution and environmental hazards caused by transportation, and build a new green, low-carbon and environmentally friendly community.

[0032] In the wastewater recycling subsystem, the regulating tank 2 12 is provided with an online monitoring device. When the COD concentration in the tank is higher than the optimal treatment concentration of the integrated wastewater treatment device 13, the rainwater in the rainwater storage tank 11 is discharged into the regulating tank 2 12 to reduce the treatment concentration of the integrated wastewater treatment device. The rainwater storage tank 11 is provided with an overflow pipe. When the amount of rainwater is too large during the rainy season, the rainwater is discharged into the municipal pipeline 27 through the overflow pipe in the rainwater storage tank 11. The purpose of the rainwater storage tank 11 is to adjust the equilibrium concentration of COD of the community wastewater treatment device and the community fire water, so as to optimize and improve the wastewater treatment efficiency to a greater extent.

[0033] The wastewater recycling subsystem calls the treated water that meets the standards as grey water. The grey water enters the grey water reservoir 14 for standby use. The grey water reservoir 14 is provided with an overflow pipe. The grey water reservoir 14 reserves one day's grey water output. Excess grey water is discharged into the municipal pipe network or community park wetland through the overflow pipe in the grey water reservoir 14.

[0034] The restaurant waste treatment subsystem uses a highly efficient aerobic fermentation device 06 to treat restaurant waste in real time on site. The treatment takes only a few hours, solving the problem of large amount of restaurant waste, high frequency and easy to rot. The oil-water separator 05 is used to separate the oil from the liquid. The collected oil can be used to make biodiesel, and the residue from the kitchen waste can be used to make organic fertilizer.

[0035] The kitchen waste treatment subsystem treats green waste, fecal black water and kitchen waste together. First, from the physical and chemical characteristics, feces are alkaline and kitchen waste is acidic. Feces are used to adjust the pH of the mixture, improve the buffering capacity of the fermentation system, and avoid excessive acidification of the mixture that affects the growth of anaerobic bacteria. Secondly, green waste is rich in cellulose and hemicellulose, which can be used as a blending material for kitchen waste to adjust nutrients such as the carbon-nitrogen ratio and increase the gas production rate of anaerobic digestion; in addition, the fiber spatial structure of cellulose can provide a skeleton support for the growth system of anaerobic digestion bacteria to a certain extent, alleviating the impact of anaerobic digestion inhibitors on anaerobic bacteria.

[0036] The upflow septic tank 20 is a three-grid type, wherein the volume of the first grid accounts for 1 / 2 of the septic tank, and the water flows from bottom to top in the septic tank. The solid parts of kitchen waste, green waste, and feces black water are mainly deposited in the first grid. A three-phase separation device is provided on the top of the septic tank, and biogas is discharged from the top through the three-phase separation device. The biogas in the tank is regularly pumped out from the bottom sewage pipe by a sewage pump and enters the biogas dehydration device 22 for dehydration.

[0037] The biogas purification device 23 includes a water seal tank, a biogas purifier, and a steam-water separator. The gas wall-mounted boiler 24 uses the generated biogas to heat the septic tank, and at the same time introduces supplementary natural gas and air to compensate for the unstable biogas production, making full use of the biogas generated by waste resources as the energy supply source of the device and reducing external energy input.

Claims

1. A distributed community kitchen waste and sewage waste on-site disposal and recycling system, characterized in that: The invention is composed of three parts: a catering waste treatment subsystem, a kitchen waste treatment subsystem and a wastewater recycling subsystem. The catering waste treatment subsystem is composed of an integrated catering waste aerobic fermentation device, which includes a dehydration device (03), an oil-water separation device (04), a high-efficiency aerobic fermentation device (05) and an exhaust gas purification device (06). The kitchen waste treatment subsystem includes a household kitchen waste crusher (15), a green waste crusher (18), a regulating tank 1 (19), an upflow septic tank (20), a diversion device (21), a biogas residue dehydration device (22), a biogas purification device (23), a gas wall-mounted boiler (24) and a natural gas supplement device (25). The wastewater recycling subsystem includes a rainwater storage tank (11), a regulating tank 2 (12), an integrated wastewater treatment device (13) and a reclaimed water storage tank (14). The catering waste (02) generated in the canteen and restaurant (01) is uniformly placed in the catering waste aerobic fermentation integrated equipment for on-site disposal, and the process includes sending the catering waste (02) to the dehydration device (03) for solid-liquid separation, the liquid is then deoiled by the oil-water separation device (04) and discharged into the regulating tank 2 (12) in the wastewater recycling subsystem for further treatment, the oil in the oil-water separation device (04) is collected and processed to produce biodiesel (26), the solid is sent to the high-efficiency aerobic fermentation device (05) for rapid aerobic fermentation and decomposition, the generated gas is purified by the tail gas purification device (06) and then discharged, and the remaining residue is collected and processed to produce organic fertilizer (07); The kitchen waste is crushed into fine particles by a household kitchen waste crusher (15) and then discharged into a regulating tank (19); the black water (16) for flushing toilets enters the regulating tank (19) through a drainage pipe; the green waste (17) in the community is crushed by a green waste crusher (18) and then discharged into the regulating tank (19); the mixture is homogenized in the regulating tank (19) and then discharged into an upflow septic tank (20) for anaerobic fermentation treatment; the gas generated by the anaerobic fermentation is discharged from the upper part of the septic tank, and is desulfurized, deCO2-dehydrated and dehydrated by a biogas purification device (23) before being introduced into the combustion gas. In the wall-mounted boiler (24), the amount of biogas and the oxygen content of the gas are monitored simultaneously. When the amount of biogas or the oxygen content of the gas is insufficient, the natural gas supplement device (25) supplements the natural gas and air. After the supernatant flowing out of the upflow septic tank is diverted by the diversion device (21), a part of it enters the regulating tank 2 (12) of the wastewater recycling subsystem for further treatment, and the rest is returned to the septic tank as reflux liquid to promote the stirring of the sludge at the bottom of the septic tank; the residue in the septic tank is discharged from the bottom, and the remaining residue is collected and processed into organic fertilizer after being dehydrated by the biogas residue dehydration device (22); Bathing drainage (09) and washbasin drainage (10) are discharged into regulating tank 2 (12) through drainage pipes; rainwater is collected through rainwater reservoir (11) and discharged into regulating tank 2 (12); catering garbage is deoiled through oil-water separation device (04) and discharged into regulating tank 2 (12); the mixture of kitchen waste is treated in upflow septic tank (20) and discharged into regulating tank 2 (12); the above wastewater is fully and evenly mixed in regulating tank 2 (12) and then discharged into integrated wastewater treatment device (13) for treatment; the treated water that meets the standards is called grey water and is discharged into grey water reservoir (14) for standby use, which is used for fire fighting, road washing, greening irrigation, and toilet flushing (28); excess grey water is discharged from grey water reservoir (14) into municipal pipeline (27) through overflow pipe; similarly, when the rainfall is large, excess rainwater is discharged from the rainwater reservoir (11) into municipal pipeline (27) through overflow pipe.

2. A method for local disposal and recycling of kitchen waste and sewage waste in a distributed community, characterized in that: The method comprises three systems: a catering waste treatment subsystem, a kitchen waste treatment subsystem and a wastewater recycling subsystem. The catering waste treatment subsystem is composed of an integrated catering waste aerobic fermentation device, the integrated device comprising a dehydration device (03), an oil-water separation device (04), a high-efficiency aerobic fermentation device (05) and an exhaust gas purification device (06). The kitchen waste treatment subsystem comprises a household kitchen waste crusher (15), a green waste crusher (18), a regulating tank 1 (19), an upflow septic tank (20), a diversion device (21), a biogas residue dehydration device (22), a biogas purification device (23), a gas wall-mounted boiler (24) and a natural gas supplement device (25). The wastewater recycling subsystem comprises a rainwater storage tank (11), a regulating tank 2 (12), an integrated wastewater treatment device (13) and a reclaimed water storage tank (14). The catering waste (02) generated in the canteen and restaurant (01) is uniformly placed in the catering waste aerobic fermentation integrated equipment for on-site disposal, and the process includes sending the catering waste (02) to the dehydration device (03) for solid-liquid separation, the liquid is then deoiled by the oil-water separation device (04) and discharged into the regulating tank 2 (12) in the wastewater recycling subsystem for further treatment, the oil in the oil-water separation device (04) is collected and processed to produce biodiesel (26), the solid is sent to the high-efficiency aerobic fermentation device (05) for rapid aerobic fermentation and decomposition, the generated gas is purified by the tail gas purification device (06) and then discharged, and the remaining residue is collected and processed to produce organic fertilizer (07); The kitchen waste is crushed into fine particles by a household kitchen waste crusher (15) and then discharged into a regulating tank (19); the black water (16) for flushing toilets enters the regulating tank (19) through a drainage pipe; the green waste (17) in the community is crushed by a green waste crusher (18) and then discharged into the regulating tank (19); the mixture is homogenized in the regulating tank (19) and then discharged into an upflow septic tank (20) for anaerobic fermentation treatment; the gas generated by the anaerobic fermentation is discharged from the upper part of the septic tank, and is desulfurized, deCO2-dehydrated and dehydrated by a biogas purification device (23) before being introduced into the combustion gas. In the wall-mounted boiler (24), the amount of biogas and the oxygen content of the gas are monitored simultaneously. When the amount of biogas or the oxygen content of the gas is insufficient, the natural gas supplement device (25) supplements the natural gas and air. After the supernatant flowing out of the upflow septic tank is diverted by the diversion device (21), a part of it enters the regulating tank 2 (12) of the wastewater recycling subsystem for further treatment, and the rest is returned to the septic tank as reflux liquid to promote the stirring of the sludge at the bottom of the septic tank; the residue in the septic tank is discharged from the bottom, and the remaining residue is collected and processed into organic fertilizer after being dehydrated by the biogas residue dehydration device (22); Bathing drainage (09) and washbasin drainage (10) are discharged into regulating tank 2 (12) through drainage pipes; rainwater is collected through rainwater reservoir (11) and discharged into regulating tank 2 (12); catering garbage is deoiled through oil-water separation device (04) and discharged into regulating tank 2 (12); the mixture of kitchen waste is treated in upflow septic tank (20) and discharged into regulating tank 2 (12); the above wastewater is fully and evenly mixed in regulating tank 2 (12) and then discharged into integrated wastewater treatment device (13) for treatment; the treated water that meets the standards is called grey water and is discharged into grey water reservoir (14) for standby use, which is used for fire fighting, road washing, greening irrigation, and toilet flushing (28); excess grey water is discharged from grey water reservoir (14) into municipal pipeline (27) through overflow pipe; similarly, when the rainfall is large, excess rainwater is discharged from the rainwater reservoir (11) into municipal pipeline (27) through overflow pipe.

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