CN112474711A - Kitchen waste treatment system - Google Patents

Kitchen waste treatment system Download PDF

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Publication number
CN112474711A
CN112474711A CN202011204896.7A CN202011204896A CN112474711A CN 112474711 A CN112474711 A CN 112474711A CN 202011204896 A CN202011204896 A CN 202011204896A CN 112474711 A CN112474711 A CN 112474711A
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tank
slag
treatment system
aerobic
kitchen waste
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施军营
平义超
王超
张瑞洁
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Land Environmental Protection Technology Group Co ltd
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Land Environmental Protection Technology Group Co ltd
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Priority to CN202011204896.7A priority Critical patent/CN112474711A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F9/00—Fertilisers from household or town refuse
    • C05F9/02—Apparatus for the manufacture
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F9/00—Fertilisers from household or town refuse
    • C05F9/04—Biological compost
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M21/00—Bioreactors or fermenters specially adapted for specific uses
    • C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M33/00—Means for introduction, transport, positioning, extraction, harvesting, peeling or sampling of biological material in or from the apparatus
    • C12M33/16—Screw conveyor
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M45/00—Means for pre-treatment of biological substances
    • C12M45/04—Phase separators; Separation of non fermentable material; Fractionation
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M47/00—Means for after-treatment of the produced biomass or of the fermentation or metabolic products, e.g. storage of biomass
    • C12M47/18—Gas cleaning, e.g. scrubbers; Separation of different gases
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06—Contaminated groundwater or leachate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
    • Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses

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Abstract

The invention discloses a kitchen waste treatment system, which comprises a pretreatment system, a sewage treatment system, a solid slag aerobic composting system and a deodorization system; the pretreatment system is connected with the sewage treatment system, the sewage treatment system is connected with the solid slag aerobic composting system, and the pretreatment system, the sewage treatment system and the solid slag aerobic composting system are all connected with the deodorization system. The advantages are that: the kitchen waste is subjected to harmless and recycling treatment by the system to obtain grease, methane and organic fertilizer, and the organic fertilizer and biodiesel prepared from the grease can change waste into valuable and generate considerable economic benefit; heating steam by using methane to provide a heat source for the system; further treating the concentrated solution generated by the sewage treatment system; carrying out aerobic fermentation on the slag generated by the pretreatment to obtain an organic fertilizer; a deodorization system is added, so that the whole system is more environment-friendly to operate; improves the treatment efficiency and economic benefit of the kitchen waste and realizes the zero discharge of three wastes in the real sense.

Description

Kitchen waste treatment system
Technical Field
The invention relates to the technical field of kitchen waste treatment, in particular to a kitchen waste treatment system.
Background
With the rapid development of the urbanization process, the rapid development of national economy and the rapid improvement of the living standard of people, the increase of large-scale hotels, restaurants leads to more and more urban kitchen waste, and if the urban kitchen waste can not be effectively treated in time, the urban kitchen waste can seriously affect the living environment of people, thereby causing a series of problems of environmental pollution, harm to human health and the like. Therefore, it is urgent to accelerate the recycling and harmless treatment of the kitchen waste.
At present, after being pretreated, the kitchen waste treatment system on the market carries out outward transport and landfill treatment or incineration on slag materials, so that not only can the waste of resources be caused, but also secondary pollution can be caused; after the wastewater is treated by anaerobic fermentation and an MBR (membrane bioreactor), the wastewater is discharged into a town sewer and is merged into municipal wastewater for centralized treatment, so that the repeated construction of wastewater treatment is caused; the generated concentrated solution is recharged, so that the biodegradability of the sewage is poor, the sewage is more and more difficult to treat, and the method is a treatment mode which treats symptoms and causes no root causes. In the treatment process of the kitchen waste, such as a pretreatment system, a sewage treatment system and an aerobic composting system, unpleasant odor is accompanied, and the main components are hydrogen sulfide, ammonia gas and a small amount of organic gas such as methyl mercaptan, dimethyl sulfide, methyl sulfide and the like; these gases, if left untreated, can cause serious pollution to the surrounding environment and even seriously threaten human health. And most of garbage disposal equipment adopts electric heating or hot water heating during the disposal, consumes a large amount of electric energy and heat energy, and increases the disposal cost.
Disclosure of Invention
The invention aims to provide a kitchen waste treatment system, so as to solve the problems in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a kitchen garbage processing system which characterized in that: comprises that
A pre-treatment system; the pretreatment system comprises a hydraulic receiving hopper, a screw conveyor, a biomass separator, a grouting pump, a slurry dehydrator, a sand removal tank and a three-phase oil-water separator; the hydraulic receiving hopper is connected with the screw conveyor and the desanding tank, the screw conveyor is connected with the biomass separator, the biomass separator is connected with the slurry dehydrator through the grouting pump, the slurry dehydrator is connected with the desanding tank, the desanding tank is connected with the three-phase oil-water separator, and the three-phase oil-water separator is connected with the crude oil tank;
a sewage treatment system; the sewage treatment system comprises an anaerobic tank, a methane purification device, a regulating tank, an anaerobic tank, an anoxic tank, an aerobic tank, an ultrafiltration membrane, a nanofiltration membrane, a reverse osmosis membrane and an MVR evaporation device; the anaerobic tank is connected with the biogas purification device and the regulating tank, the regulating tank is connected with the anaerobic tank, the anaerobic tank is connected with the anoxic tank, the anoxic tank is connected with the aerobic tank, the aerobic tank is connected with the ultrafiltration membrane, the ultrafiltration membrane is connected with the nanofiltration membrane, the nanofiltration membrane is connected with the reverse osmosis membrane, and the reverse osmosis membrane is connected with the MVR evaporation device;
a solid slag aerobic composting system; the solid slag aerobic composting system comprises a slag conveying device, an aerobic temperature control fermentation room, a microbial inoculum adding device, a blast air exchange device and a push rod material turning device; the slag material conveying device is connected with the aerobic temperature-controlled fermentation room, the microbial inoculum adding device and the push rod material turning device are arranged in the aerobic temperature-controlled fermentation room, and the air blowing and air changing device is arranged on the push rod material turning device;
a deodorizing system; the device comprises an odor collecting and conveying device, an integrated biological filter and a photocatalytic deodorization device; the odor collecting and conveying device is connected with the integrated biological filter, the integrated biological filter is connected with the photocatalytic deodorization device, and a spraying device and an automatic dosing device are arranged on the integrated biological filter;
the slurry dehydrator and the three-phase oil-water separator are connected with the anaerobic tank and the slag collecting and conveying device; the anaerobic tank and the MVR evaporation device are connected with the slag collecting and conveying device; the pretreatment system, the sewage treatment system and the solid slag aerobic composting system are all connected with the odor collection and treatment device.
Preferably, the integrated biological filter comprises a pre-washing tank and a biological filter, wherein automatic spraying devices are independently arranged on the pre-washing tank and the biological filter, an automatic dosing device is arranged on the pre-washing tank, and the automatic dosing device adds alkali liquor into the pre-washing tank to control the pH value in the pre-washing tank to be 8-10; and a PH detector for detecting the PH value is arranged in the pre-washing tank.
Preferably, the slag is conveyed into an aerobic temperature-controlled fermentation room through a slag conveying device, a microbial inoculum is added into the slag through a microbial inoculum adding device, when the temperature of the slag is greater than or equal to 55 ℃, the slag is conveyed onto a push rod tipping device and is stacked into a rotten heap after being turned over at regular time through the push rod tipping device; the working cycle of the push rod tipping device is 5-7 days.
Preferably, the decomposed piles are screened by a screening machine to obtain the organic fertilizer, and the mesh size of the screening machine is 18 meshes.
Preferably, the system also comprises biogas boiler equipment, wherein the biogas boiler equipment is connected with the biogas purification device, and is connected with the desanding tank, the anaerobic tank and the aerobic temperature-controlled fermentation room through a steam coil pipe to provide a heat source for the desanding tank, the anaerobic tank and the aerobic temperature-controlled fermentation room.
Preferably, the pretreatment system comprises a delivery pump and a plunger pump, a first water collecting tank is arranged on the hydraulic material receiving hopper, a second water collecting tank is arranged on the slurry dehydrator, and the first water collecting tank and the second water collecting tank are respectively connected with the desanding tank through one delivery pump; the sand removing tank is provided with a heater connected with the steam coil, a frame type stirrer is arranged inside the sand removing tank, the bottom of the sand removing tank is provided with a discharge port, the discharge port is connected with a discharging conveyor, and the sand removing tank is connected with the three-phase oil-water separator through a plunger pump.
The invention has the beneficial effects that: 1. the solid slag obtained by the pretreatment system and the sewage treatment system is fermented into the organic fertilizer by the solid slag aerobic composting system, so that secondary pollution and resource waste caused by direct landfill or incineration are avoided, and the organic fertilizer can be obtained, thereby improving the economic benefit of the kitchen waste. 2. The system can be used for treating the kitchen waste to obtain grease and methane, the grease is used for preparing biodiesel, and the methane can be used for burning a boiler to provide a heat source for heating the kitchen waste treatment system. 3. The concentrated solution wastewater generated after the treatment by the system is reused for further treatment by a sewage treatment system, so that the sewage treatment effect is improved, and secondary pollution caused by recharging is avoided. 4. The odor generated by the pretreatment system, the sewage treatment system and the solid slag aerobic composting system is collected and treated in a centralized manner by utilizing the deodorization system, so that the pollution to the environment caused by the waste gas generated by the treatment of the kitchen waste is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a kitchen waste treatment system in the embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Example one
As shown in fig. 1, in the present embodiment, a kitchen waste treatment system is provided, which is characterized in that: comprises that
A pre-treatment system; the pretreatment system comprises a hydraulic receiving hopper, a screw conveyor, a biomass separator, a grouting pump, a slurry dehydrator, a sand removal tank and a three-phase oil-water separator; the hydraulic pressure connect the hopper with screw conveyer with the degritting jar links to each other, screw conveyer with biomass separator links to each other, biomass separator warp the grouting pump with the thick liquids hydroextractor links to each other, the thick liquids hydroextractor with the degritting jar links to each other, the degritting jar with three-phase oil water separator links to each other, three-phase oil water separator with the crude oil jar links to each other.
A sewage treatment system; the sewage treatment system comprises an anaerobic tank, a methane purification device, a regulating tank, an anaerobic tank, an anoxic tank, an aerobic tank, an ultrafiltration membrane, a nanofiltration membrane, a reverse osmosis membrane and an MVR evaporation device; the anaerobic tank is connected with the biogas purification device and the regulating tank, the regulating tank is connected with the anaerobic tank, the anaerobic tank is connected with the anoxic tank, the anoxic tank is connected with the aerobic tank, the aerobic tank is connected with the ultrafiltration membrane, the ultrafiltration membrane is connected with the nanofiltration membrane, the nanofiltration membrane is connected with the reverse osmosis membrane, and the reverse osmosis membrane is connected with the MVR evaporation device;
a solid slag aerobic composting system; the solid slag aerobic composting system comprises a slag conveying device, an aerobic temperature control fermentation room, a microbial inoculum adding device, a blast air exchange device and a push rod material turning device; the slag material conveying device is connected with the aerobic temperature-controlled fermentation room, the microbial inoculum adding device and the push rod material turning device are arranged in the aerobic temperature-controlled fermentation room, and the air blowing and air changing device is arranged on the push rod material turning device;
a deodorizing system; the device comprises an odor collecting and conveying device, an integrated biological filter and a photocatalytic deodorization device; the odor collecting and conveying device is connected with the integrated biological filter, the integrated biological filter is connected with the photocatalytic deodorization device, and a spraying device and an automatic dosing device are arranged on the integrated biological filter;
the slurry dehydrator and the three-phase oil-water separator are connected with the anaerobic tank and the slag collecting and conveying device; the anaerobic tank and the MVR evaporation device are connected with the slag collecting and conveying device; the pretreatment system, the sewage treatment system and the solid slag aerobic composting system are all connected with the odor collection and treatment device.
In this embodiment, the system further comprises a biogas boiler device, the biogas boiler device is connected with the biogas purification device, and the biogas boiler device is connected with the desanding tank, the anaerobic tank and the aerobic temperature-controlled fermentation room through a steam coil pipe to provide a heat source for the desanding tank, the anaerobic tank and the aerobic temperature-controlled fermentation room.
In this embodiment, the pretreatment system includes a delivery pump and a plunger pump, a first water collection tank is disposed on the hydraulic receiving hopper, a second water collection tank is disposed on the slurry dehydrator, and the first water collection tank and the second water collection tank are respectively connected to the desanding tank through one delivery pump; the sand removing tank is provided with a heater connected with the steam coil, a frame type stirrer is arranged inside the sand removing tank, the bottom of the sand removing tank is provided with a discharge port, the discharge port is connected with a discharging conveyor, and the sand removing tank is connected with the three-phase oil-water separator through a plunger pump.
In this embodiment, the delivery outlet that hydraulic pressure connects the hopper links to each other with screw conveyer's input port, screw conveyer's delivery outlet links to each other with biomass separator's input port, biomass separator's delivery outlet links to each other with the input port of grouting pump and thick liquids hydroextractor. The output port of the slurry dehydrator is connected with the slag conveying device through a conveyor.
Example two
In this embodiment, the working process of the preprocessing system is as follows: the kitchen waste collected and transported by the kitchen collecting and transporting vehicle is received by the hydraulic receiving hopper, and the kitchen waste in the hydraulic receiving hopper is drained and then conveyed to the biomass separator by the screw conveyer; the liquid phase enters a first water collecting tank below the hydraulic receiving hopper. The biomass separator is used for sorting non-kitchen waste such as plastics, pop cans, chopsticks and the like in the waste, crushing the kitchen waste into slurry, and classifying and recycling the sorted solid matters. The kitchen waste slurry enters a slurry dehydrator through a grouting pump to carry out preliminary solid-liquid separation; the slag enters the slag conveying device, and the liquid phase enters a second water collecting tank below the slurry dehydrator. The materials in the first water collecting tank and the second water collecting tank are respectively pumped into the desanding tank through the delivery pumps, desanding and preheating hydrolysis are carried out on the materials, the materials are preheated by adopting a steam coil pipe to be indirectly heated, gravel is stirred and precipitated to the bottom through a frame type stirrer, the gravel is discharged through a discharging conveyor at the bottom to be buried, and liquid after preheating hydrolysis enters the three-phase oil-water separator. And separating the hydrolyzed materials by a three-phase oil-water separator to respectively obtain crude grease, waste water and slag. Wherein the crude oil is stored in a crude oil tank, and the biodiesel is obtained by the steps of purification and decoloration, ester exchange, reduced pressure distillation and the like in sequence; the wastewater enters a sewage treatment system for subsequent treatment; the slag enters a solid slag aerobic composting system for treatment through a slag conveying device.
EXAMPLE III
In this embodiment, the working process of the sewage treatment system is as follows: waste water separated by a three-phase oil-water separator in the pretreatment system enters an anaerobic tank after being regulated to generate methane and fermented materials, slag materials after the fermented materials are subjected to solid-liquid separation enter a solid slag material aerobic composting system through a slag material conveying device for treatment, liquid enters an adjusting tank, and the methane enters a methane purification device. The waste water entering the mediation pond passes through the anaerobic pond, the anoxic pond, the aerobic pond, the ultrafiltration membrane, the nanofiltration membrane and the reverse osmosis membrane in sequence, clear water is discharged up to the standard, and concentrated solution enters the MVR evaporation plant for treatment. After the concentrated solution is treated by the MVR evaporation device, evaporation condensate water is discharged up to the standard, and sludge generated by evaporation concentration enters a solid slag aerobic composting system through a slag conveying device for treatment.
Example four
In the embodiment, the slag is conveyed into an aerobic temperature-controlled fermentation room through a slag conveying device, a microbial inoculum is added into the slag through a microbial inoculum adding device, when the temperature of the slag is greater than or equal to 55 ℃, the slag is conveyed onto a push rod tipping device, and the slag is stacked into a rotten pile after being turned over at regular time through the push rod tipping device; the working cycle of the push rod tipping device is 5-7 days.
The working process of the solid slag aerobic composting system is as follows: the slag material enters an aerobic temperature control fermentation room through a slag material conveying device, after the microbial inoculum is automatically added to the material through a microbial inoculum adding device, the material is conveyed to the upper part of a push rod turning device when the temperature rises to above 55 ℃, the compost is turned downwards layer by layer through the push rod turning device to reach a compost rotten pile, and after the material is rotten, the decomposed organic fertilizer is obtained through screening by a screening machine.
The temperature of the aerobic temperature control fermentation room is controlled to be about 40 ℃, the push rod material turning device is provided with a blast air interchanger (a blast blower), and the materials are quickly aerobically composted through the push rod material turning device and then composted through the pile
The organic fertilizer is obtained by screening the materials after the materials need to be thoroughly decomposed for about 20 days in a decomposing heap through a screening machine, wherein the aperture of a screen mesh is 18 meshes.
EXAMPLE five
In the embodiment, the integrated biological filter comprises a pre-washing tank and a biological filter, wherein automatic spraying devices are respectively and independently arranged on the pre-washing tank and the biological filter, an automatic chemical feeding device is arranged on the pre-washing tank, and the automatic chemical feeding device is used for adding alkali liquor into the pre-washing tank so as to control the pH value in the biological filter to be 8-10; and a PH detector for detecting the PH value is arranged in the pre-washing tank. And regularly replacing part of sewage discharged from the integrated biological filter every 1-3 months, and introducing the sewage into a sewage treatment system for treatment.
The working process of the deodorization system is as follows: the odor of the pretreatment system, the sewage treatment system and the solid slag aerobic composting system is conveyed to the integrated biofilter with the spraying device through an odor collecting and treating device, the odor is washed and humidified through the prewashing tank, then enters the biofilter to be in contact with filtrate and biological filler layers, the filtrate and microorganisms attached to the surfaces of the biological fillers absorb and decompose odor substances as nutrients, and finally enters the photocatalytic deodorization device to be discharged up to the standard, so that the purposes of purification and deodorization are achieved.
The kitchen waste treated by the system in a harmless and recycling way can obtain three parts of grease, methane and organic fertilizer. Organic fertilizer and biodiesel prepared by using grease can change waste into valuable and generate good economic benefit; the biogas is used for heating steam for heating the kitchen garbage treatment system; the concentrated solution generated by the wastewater treatment system is not a traditional temporary treatment mode of recharging a landfill, but is further treated by an MVR evaporation device; the slag generated by the pretreatment is not treated by external transport and landfill or incineration, but is aerobically fermented into organic fertilizer. The system is additionally provided with a deodorization system aiming at the waste gas of a pretreatment system, a sewage treatment system and a solid slag aerobic composting system, so that the whole system is more environment-friendly to operate, secondary pollution to the environment is effectively avoided, the system is a green, environment-friendly, economic and efficient treatment mode, and zero discharge of three wastes is realized in a real sense.
By adopting the technical scheme disclosed by the invention, the following beneficial effects are obtained:
the invention discloses a kitchen waste treatment system, wherein solid slag obtained by a pretreatment system and a sewage treatment system is fermented into organic fertilizer by utilizing a solid slag aerobic composting system, so that secondary pollution and resource waste caused by direct landfill or incineration are avoided, and the organic fertilizer can be obtained, thereby improving the economic benefit of kitchen waste. The system can be used for treating the kitchen waste to obtain grease and methane, the grease is used for preparing biodiesel, and the methane can be used for burning a boiler to provide a heat source for heating the kitchen waste treatment system. The concentrated solution wastewater generated after the treatment by the system is reused for further treatment by a sewage treatment system, so that the sewage treatment effect is improved, and secondary pollution caused by recharging is avoided. The odor generated by the pretreatment system, the sewage treatment system and the solid slag aerobic composting system is collected and treated in a centralized manner by utilizing the deodorization system, so that the pollution to the environment caused by the waste gas generated by the treatment of the kitchen waste is avoided.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.

Claims (6)

1. The utility model provides a kitchen garbage processing system which characterized in that: comprises that
A pre-treatment system; the pretreatment system comprises a hydraulic receiving hopper, a screw conveyor, a biomass separator, a grouting pump, a slurry dehydrator, a sand removal tank and a three-phase oil-water separator; the hydraulic receiving hopper is connected with the screw conveyor and the desanding tank, the screw conveyor is connected with the biomass separator, the biomass separator is connected with the slurry dehydrator through the grouting pump, the slurry dehydrator is connected with the desanding tank, the desanding tank is connected with the three-phase oil-water separator, and the three-phase oil-water separator is connected with the crude oil tank;
a sewage treatment system; the sewage treatment system comprises an anaerobic tank, a methane purification device, a regulating tank, an anaerobic tank, an anoxic tank, an aerobic tank, an ultrafiltration membrane, a nanofiltration membrane, a reverse osmosis membrane and an MVR evaporation device; the anaerobic tank is connected with the biogas purification device and the regulating tank, the regulating tank is connected with the anaerobic tank, the anaerobic tank is connected with the anoxic tank, the anoxic tank is connected with the aerobic tank, the aerobic tank is connected with the ultrafiltration membrane, the ultrafiltration membrane is connected with the nanofiltration membrane, the nanofiltration membrane is connected with the reverse osmosis membrane, and the reverse osmosis membrane is connected with the MVR evaporation device;
a solid slag aerobic composting system; the solid slag aerobic composting system comprises a slag conveying device, an aerobic temperature control fermentation room, a microbial inoculum adding device, a blast air exchange device and a push rod material turning device; the slag material conveying device is connected with the aerobic temperature-controlled fermentation room, the microbial inoculum adding device and the push rod material turning device are arranged in the aerobic temperature-controlled fermentation room, and the air blowing and air changing device is arranged on the push rod material turning device;
a deodorizing system; the device comprises an odor collecting and conveying device, an integrated biological filter and a photocatalytic deodorization device; the odor collecting and conveying device is connected with the integrated biological filter, the integrated biological filter is connected with the photocatalytic deodorization device, and a spraying device and an automatic dosing device are arranged on the integrated biological filter;
the slurry dehydrator and the three-phase oil-water separator are connected with the anaerobic tank and the slag collecting and conveying device; the anaerobic tank and the MVR evaporation device are connected with the slag collecting and conveying device; the pretreatment system, the sewage treatment system and the solid slag aerobic composting system are all connected with the odor collection and treatment device.
2. The kitchen waste treatment system according to claim 1, characterized in that: the integrated biological filter comprises a pre-washing tank and a biological filter, wherein automatic spraying devices are respectively and independently arranged on the pre-washing tank and the biological filter, an automatic chemical feeding device is arranged on the pre-washing tank, and the automatic chemical feeding device is used for adding alkali liquor into the pre-washing tank so as to control the pH value in the pre-washing tank to be 8-10; and a PH detector for detecting the PH value is arranged in the pre-washing tank.
3. The kitchen waste treatment system according to claim 1, characterized in that: the slag materials are sent into an aerobic temperature control fermentation room through a slag material conveying device, a microbial inoculum is added into the slag materials through a microbial inoculum adding device, when the temperature of the slag materials is greater than or equal to 55 ℃, the slag materials are conveyed onto a push rod tipping device, and are stacked into a rotten pile after being turned over at regular time through the push rod tipping device; the working cycle of the push rod tipping device is 5-7 days.
4. The kitchen waste treatment system according to claim 3, characterized in that: and screening the decomposed piles by a screening machine to obtain the organic fertilizer, wherein the mesh size of the screening machine is 18 meshes.
5. The kitchen waste treatment system according to claim 1, characterized in that: the system also comprises biogas boiler equipment, wherein the biogas boiler equipment is connected with the biogas purification device, and is connected with the desanding tank, the anaerobic tank and the aerobic temperature-controlled fermentation room through a steam coil pipe to provide a heat source for the biogas boiler equipment.
6. The kitchen waste treatment system according to claim 1, characterized in that: the pretreatment system comprises a delivery pump and a plunger pump, a first water collecting tank is arranged on the hydraulic receiving hopper, a second water collecting tank is arranged on the slurry dehydrator, and the first water collecting tank and the second water collecting tank are respectively connected with the desanding tank through one delivery pump; the sand removing tank is provided with a heater connected with the steam coil, a frame type stirrer is arranged inside the sand removing tank, the bottom of the sand removing tank is provided with a discharge port, the discharge port is connected with a discharging conveyor, and the sand removing tank is connected with the three-phase oil-water separator through a plunger pump.
CN202011204896.7A 2020-11-02 2020-11-02 Kitchen waste treatment system Pending CN112474711A (en)

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Application publication date: 20210312