CN113290018A - Kitchen waste treatment method and system - Google Patents
Kitchen waste treatment method and system Download PDFInfo
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- CN113290018A CN113290018A CN202110448720.4A CN202110448720A CN113290018A CN 113290018 A CN113290018 A CN 113290018A CN 202110448720 A CN202110448720 A CN 202110448720A CN 113290018 A CN113290018 A CN 113290018A
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- 238000000034 method Methods 0.000 title claims abstract description 31
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Images
Classifications
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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
-
- 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
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Manufacturing & Machinery (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The embodiment of the application provides a kitchen waste treatment method and a system, which belong to the technical field of environmental protection, and specifically comprise the following steps: diluting and dissolving the pasty particles obtained by crushing the kitchen waste by adding water to obtain mixed liquid; placing the mixed liquid into a third-stage oil separation tank, standing for a preset time to form a separated grease layer and a liquid mixture, collecting the grease, and pumping the liquid mixture into a mixing stirring tank; adding a flocculating agent into the mixing and stirring tank to obtain wastewater and a flocculation precipitate; performing wastewater treatment in an MBR membrane water treatment tank to obtain discharge water reaching the standard; and (3) carrying out filter pressing treatment on the flocculated precipitate by using a hydraulic cylinder, wherein the obtained kitchen waste residue is extremely low in acetic acid, hot pepper and salt. The treatment method and the system effectively solve the problem that the kitchen waste is high in salt content and cannot be utilized, the treatment time is short, no odor is generated, the waste water is recycled completely, no secondary hazard exists, the kitchen waste residues can be used as production raw materials of alcohol, a high-molecular soil remediation agent and an organic fertilizer, and the resource utilization efficiency is effectively improved.
Description
Technical Field
The application relates to the technical field of environmental protection, in particular to a kitchen waste treatment method and system.
Background
Along with the acceleration of the garbage classification popularization process, the kitchen garbage yield is also getting bigger and bigger. If the kitchen waste treatment capacity can not meet the requirement, the urban environment is seriously influenced, the health and safety of people are endangered, and great potential safety hazard is caused. For example, after the garbage classification is promoted in a certain city, the daily yield of the kitchen garbage is increased to 4350 tons, the original equipment and technology cannot treat a large amount of kitchen garbage with the water content of 80-90%, and other cities can also have the same problems in the garbage classification and promotion process.
The main components of the kitchen waste comprise rice and flour food residues, vegetables, animal and vegetable oil, meat and bones and the like, and the quantity of the kitchen waste in China is very large and the kitchen waste is in a rapid rising trend. The kitchen waste has the characteristics of high water content which can reach 80-95%, difficult transportation, high salt content, hot pepper and acetic acid content in partial areas and the like. In addition, the kitchen waste is high in organic matter content, protein, cellulose, starch, fat and the like, is rich in nitrogen, phosphorus, potassium, calcium and various trace elements, and is easy to rot, deteriorate and smell in summer, pathogenic bacteria and pathogenic microorganisms exist in breeding mosquitoes.
At present, after garbage classification, resource utilization of kitchen garbage is required, and the purpose of saving resources is achieved. However, the prior art has significant technical defects for treating the kitchen waste, has anaerobic fermentation and aerobic fermentation compost, and easily generates secondary harmful toxic substances such as garbage percolate, odor, aflatoxin, benzene and the like due to long time of treatment and decomposition; the kitchen waste contains high-salt, grease, vinegar and pepper and other substances, and a simple fermentation technology cannot treat the kitchen waste, so that the organic fertilizer generated after treatment has high salt content and cannot be used due to other secondary hazards, and the real resource utilization cannot be realized.
Disclosure of Invention
In view of this, the embodiments of the present disclosure provide a kitchen waste treatment method and system, which at least partially solve the problems in the prior art.
In a first aspect, an embodiment of the present disclosure provides a kitchen waste treatment method, including:
crushing the kitchen waste into pasty particles, and placing the pasty particles into a mixing container;
pouring water into the mixing container, and diluting and dissolving the pasty particles to obtain a mixed liquid;
placing the mixed liquid into a third-stage oil separation tank and standing for a preset time to form a grease layer and a liquid mixture;
collecting the grease through an oil wiper at the upper part of the third-stage oil separation tank;
pumping the liquid mixture into a mixing and stirring tank through a sludge pump at the bottom of the third-stage oil separation tank;
adding a flocculating agent into the mixing and stirring tank to enable organic matters in the liquid mixture to be coagulated and precipitated to obtain wastewater and flocculated precipitates;
pumping the wastewater into an MBR membrane water treatment tank for wastewater treatment to obtain standard discharge water, and discharging or recycling the standard discharge water;
and pumping the flocculated precipitate into a hydraulic cylinder with micropores for filter pressing treatment, and extruding water to obtain the high-pressure pressed kitchen waste residues.
In a second aspect, an embodiment of the present disclosure provides a kitchen waste treatment system, including: a mixing container, a three-stage oil separation tank, a mixing and stirring tank, an MBR membrane water treatment tank and a hydraulic cylinder with micropores which are sequentially communicated;
the mixing container is used for placing pasty particles formed by crushing the kitchen waste, and water is poured into the mixing container to dilute and dissolve the pasty particles to obtain mixed liquid;
the third-stage oil separation tank is used for standing the mixed liquid for a preset time to form a grease layer and a liquid mixture;
the oil wiper at the upper part of the third-stage oil separation tank is used for collecting the grease;
the sludge pump at the bottom of the third-stage oil separation tank is used for pumping the liquid mixture into the mixing and stirring tank;
the mixing and stirring tank is used for adding a flocculating agent into the liquid mixture to enable organic matters in the liquid mixture to be coagulated and precipitated to obtain wastewater and flocculated precipitates;
the MBR membrane water treatment tank is used for treating the wastewater to obtain standard discharge water, and the standard discharge water is discharged or recycled;
and the hydraulic cylinder is used for performing filter pressing treatment on the flocculation precipitate and extruding water to obtain the kitchen waste residues of the high-pressure pressing block.
The kitchen waste treatment method in the embodiment of the disclosure comprises the steps of crushing kitchen waste into pasty particles, and placing the pasty particles into a mixing container; pouring water into the mixing container, and diluting and dissolving the pasty particles to obtain a mixed liquid; placing the mixed liquid into a third-stage oil separation tank and standing for a preset time to form a grease layer and a liquid mixture; collecting the grease through an oil wiper at the upper part of the third-stage oil separation tank; pumping the liquid mixture into a mixing and stirring tank through a sludge pump at the bottom of the third-stage oil separation tank; adding a flocculating agent into the mixing and stirring tank to enable organic matters in the liquid mixture to be coagulated and precipitated to obtain wastewater and flocculated precipitates; pumping the wastewater into an MBR membrane water treatment tank for wastewater treatment to obtain discharge water reaching the standard; and pumping the flocculated precipitate into a hydraulic cylinder for internal pressure filtration treatment to obtain high-pressure briquetted kitchen waste residues. Through the scheme disclosed by the invention, the treatment time of the kitchen waste is short, odor and wastewater are not generated and are completely recycled, other secondary hazards are avoided, the content of acetic acid, hot pepper and salt in the kitchen waste residues of the high-pressure briquetting is extremely low, and the effect of using the kitchen waste residues as raw materials can be ignored and not influenced. The kitchen waste residues after briquetting contain a large amount of protein and starch, can be reused as resources, can be used as raw materials for manufacturing industrial alcohol and polymer soil remediation agents, can meet the international standard of original salt content when used for producing organic fertilizers, and effectively improves the utilization efficiency of resources.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a flow chart of a kitchen waste treatment method according to an embodiment of the present invention;
fig. 2 is a structural diagram of a kitchen waste treatment system provided in an embodiment of the present invention.
Detailed Description
The embodiments of the present application will be described in detail below with reference to the accompanying drawings.
The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The present application is capable of other and different embodiments and its several details are capable of modifications and/or changes in various respects, all without departing from the spirit of the present application. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It is noted that various aspects of the embodiments are described below within the scope of the appended claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present application, one skilled in the art should appreciate that one aspect described herein may be implemented independently of any other aspects and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. Additionally, such an apparatus may be implemented and/or such a method may be practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present application, and the drawings only show the components related to the present application rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
The embodiment of the application provides a kitchen waste treatment method.
Referring to fig. 1, a kitchen waste treatment method provided by the embodiment of the present disclosure includes:
step S101, smashing kitchen waste into pasty particles, and placing the pasty particles into a mixing container.
In this embodiment, the kitchen waste can be classified into food waste and kitchen waste according to the source. The food waste is mainly used as leftover in restaurant, dining room and other catering industry, and has the features of great production amount, great resource and wide distribution. The kitchen waste mainly refers to the waste residual materials in daily cooking of residents, and the kitchen waste is easy to rot and deteriorate, emit stink and spread bacteria and viruses.
In this embodiment, the kitchen waste may be pulverized by a pulverizer to obtain pasty particles, which is not limited herein.
Optionally, the paste particles have a diameter of less than 10 mm.
Therefore, the diameter of the pasty particles is controlled to be 10 mm as much as possible, so that the pasty particles are more fully diluted and dissolved, and the subsequent kitchen waste treatment process is facilitated.
And S102, pouring water into the mixing container, and diluting and dissolving the pasty particles to obtain a mixed liquid.
In this embodiment, the mixing container has a large capacity, and a large amount of paste particles can be placed therein, and after water is added, a stirring operation can be performed to sufficiently stir the paste particles, so that the paste particles are sufficiently diluted and dissolved in water to obtain a mixed liquid.
Optionally, the kitchen waste treatment method further includes:
heating the mixing container by a first heater to dilute and dissolve the pasty particles in the water.
In the present embodiment, the first heater heats the mixing container to sufficiently dilute and dissolve the paste particles in the heated water, so that the fat and oil can be dissolved and separated to the maximum extent, and the paste particles can be dissolved and diluted.
And S103, placing the mixed liquid into a three-stage oil separation tank to stand for a preset time to form a grease layer and liquid mixture.
In this embodiment, the heated mixed liquid can be separated from part of the finely dispersed oil in the mixed liquid by the natural floating method in the oil separation tank by utilizing the specific gravity difference between the oil and the water. The third-stage oil separation tank can separate grease, impurities and water of the mixed liquid. The third oil separation tank is used for separating grease and liquid mixture without oil.
It should be noted that the preset time may be set according to a requirement, or several tens of minutes or several tens of hours, so as to achieve a better separation effect, and may be determined according to an empirical value, which is not limited herein.
Optionally, the kitchen waste treatment method further includes:
and heating the mixed liquid by a second heater of the three-stage oil separation tank, and standing the heated mixed liquid for a preset time to fully separate out the grease.
In the present embodiment, the mixed liquid is heated by the second heater to sufficiently separate the oil and the water in the mixed liquid, so that a sufficiently separated oil and liquid mixture is obtained after standing still, and the liquid mixture does not contain the oil.
And step S104, collecting the grease through the upper part of the third-level oil separation tank.
In this embodiment, the oil wiper collects grease from the tertiary oil interceptor.
And S105, pumping the liquid mixture into a mixing and stirring tank through a sludge pump at the bottom of the third-stage oil separation tank.
In the embodiment, the liquid mixture in the third-stage oil separation tank is pumped into the mixing and stirring tank by the sludge pump, wherein the liquid mixture does not contain grease.
And step S106, adding a flocculating agent into the mixing and stirring tank to enable organic matters in the liquid mixture to be coagulated and precipitated to obtain wastewater and flocculated precipitates.
The flocculant comprises an organic flocculant which can be an organic polymer flocculant, a natural organic polymer flocculant and a microbial flocculant. The organic polymer flocculant has the characteristics of small dosage, low scum yield, strong flocculation capacity, easy separation of flocs, and good oil and suspended matter removing effect. The microbial flocculant has the characteristics of no secondary pollution and convenient use. The microbial flocculant has the characteristics of high efficiency, no toxicity and no secondary pollution of biodegradability and safety.
And S107, pumping the wastewater into an MBR membrane water treatment tank for wastewater treatment to obtain standard discharge water, and discharging or recycling the standard discharge water.
In this embodiment, MBR, also called Membrane bioreactor (Membrane Bio-Reactor), is a new water treatment technology combining a Membrane separation unit and a biological treatment unit. According to the structure of the membrane, the membrane can be divided into a flat membrane, a tubular membrane, a hollow fiber membrane and the like, and according to the membrane aperture, the membrane can be divided into a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane, a reverse osmosis membrane and the like. The MBR membrane water treatment tank is a sewage treatment tank provided with a membrane bioreactor. And (4) treating the wastewater by the MBR membrane water treatment tank to obtain clean water meeting the discharge standard, and collecting and recycling the clean water.
And S108, pumping the flocculated precipitate into a hydraulic cylinder with micropores for filter pressing treatment, and extruding water to obtain high-pressure pressed kitchen waste residues.
In this embodiment, the pores are evenly and suitably distributed in the wall of the hydraulic cylinder 205. And (3) carrying out high-pressure operation on the flocculated precipitate through a hydraulic cylinder to obtain the kitchen waste residue with filter pressing water and high-pressure briquetting. The kitchen waste residues of the high-pressure briquetting contain very low acetic acid, hot pepper and salt, and the effect of using the kitchen waste residues as raw materials can be ignored and not influenced.
Optionally, the kitchen waste treatment method further includes:
and pumping the flocculated precipitate into a hydraulic cylinder for filter pressing treatment, then obtaining filter pressing water, putting the filter pressing water into the mixing and stirring tank for secondary treatment, and adding a flocculating agent into the mixing and stirring tank to enable organic matters in the filter pressing water to be coagulated and precipitated.
Like this, further carry out sewage treatment to the filter-pressing water for the organic matter solidifies the sediment, avoids appearing secondary pollutant, improves the sewage treatment effect.
The kitchen waste treatment method in the embodiment of the disclosure comprises the steps of crushing kitchen waste into pasty particles, and placing the pasty particles into a mixing container; pouring water into the mixing container, and diluting and dissolving the pasty particles to obtain a mixed liquid; placing the mixed liquid into a third-stage oil separation tank and standing for a preset time to form a grease layer and a liquid mixture; collecting the grease through an oil wiper at the upper part of the third-stage oil separation tank; pumping the liquid mixture into a mixing and stirring tank through a sludge pump at the bottom of the third-stage oil separation tank; adding a flocculating agent into the mixing and stirring tank to enable organic matters in the liquid mixture to be coagulated and precipitated to obtain wastewater and flocculated precipitates; pumping the wastewater into an MBR membrane water treatment tank for wastewater treatment to obtain discharge water reaching the standard; and pumping the flocculated precipitate into a hydraulic cylinder for internal pressure filtration treatment to obtain high-pressure briquetted kitchen waste residues. Through the scheme disclosed by the invention, the treatment time of the kitchen waste is short, odor and wastewater are not generated and are completely recycled, other secondary hazards are avoided, the content of acetic acid, hot pepper and salt in the kitchen waste residues of the high-pressure briquetting is extremely low, and the effect of using the kitchen waste residues as raw materials can be ignored and not influenced. The prepared fertilizer can meet the original organic fertilizer standard internationally specified by salinity, and the pressed kitchen waste residues contain a large amount of protein and starch and can be recycled as resources, so that the resource utilization efficiency is effectively improved.
Corresponding to the above method embodiment, referring to fig. 2, an embodiment of the present disclosure further provides a kitchen waste treatment system 200, including: the device comprises a mixing container 201, a third-stage oil separation tank 202, a mixing and stirring tank 203, an MBR membrane water treatment tank 204 and a hydraulic cylinder 205 which are sequentially communicated, wherein micropores are uniformly and properly distributed on the wall of the hydraulic cylinder 205.
The mixing container 201 is used for placing pasty particles formed by crushing kitchen waste, and water is poured into the mixing container to dilute and dissolve the pasty particles to obtain mixed liquid.
In this embodiment, the kitchen waste can be classified into food waste and kitchen waste according to the source. The food waste is mainly used as leftover in restaurant, dining room and other catering industry, and has the features of great production amount, great resource and wide distribution. The kitchen waste mainly refers to the waste residual materials in daily cooking of residents, and the kitchen waste is easy to rot and deteriorate, emit stink and spread bacteria and viruses.
In this embodiment, the kitchen waste may be pulverized by a pulverizer to obtain pasty particles, which is not limited herein.
Optionally, the paste particles have a diameter of less than 10 mm.
Therefore, the diameter of the pasty particles is controlled to be 10 mm as much as possible, so that the pasty particles are more fully diluted and dissolved, and the subsequent kitchen waste treatment process is facilitated.
In this embodiment, the mixing container has a large capacity, and large paste particles can be placed in the mixing container, and after water is added, a stirring operation can be performed to sufficiently stir the paste particles, so that the paste particles are sufficiently diluted and dissolved in water to obtain a mixed liquid.
Optionally, the kitchen waste treatment system further includes:
and a first heater for heating the mixing container to dilute and dissolve the pasty particles in the water.
In this embodiment, the first heater heats the mixing container to sufficiently dilute and dissolve the paste particles in the heated water, thereby facilitating the maximum dissolution of the fat and oil and easy separation of the fat and dissolving and diluting the paste particles.
And the third-stage oil separation tank 202 is used for standing the mixed liquid for a preset time to form a grease layer and a liquid mixture.
In this embodiment, the heated mixed liquid can be separated from part of the finely dispersed oil in the mixed liquid by the natural floating method in the oil separation tank by utilizing the specific gravity difference between the oil and the water. The third-stage oil separation tank can separate grease, impurities and water of the mixed liquid. The third oil separation tank is used for separating grease and a grease-free liquid mixture.
It should be noted that the preset time may be set according to a requirement, or several tens of minutes or several tens of hours, so as to achieve a better separation effect, and may be determined according to an empirical value, which is not limited herein.
Optionally, the third-stage oil separation tank 202 further includes a second heater;
and the second heater is used for heating the mixed liquid, and the heated mixed liquid is kept stand for a preset time so as to be convenient for fully separating out the grease.
In the present embodiment, the mixed liquid is heated by the second heater to sufficiently separate the oil and the water in the mixed liquid, so that a sufficiently separated oil and liquid mixture is obtained after standing still, and the liquid mixture does not contain the oil.
And an oil scraper arranged at the upper part of the third-stage oil separation tank 202 is used for collecting the grease.
In this embodiment, the oil wiper collects grease from the tertiary oil interceptor.
And a sludge pump at the bottom 202 of the third-stage oil separation tank is used for pumping the liquid mixture into the mixing and stirring tank.
In this example, the liquid mixture in the third-stage oil separation tank was pumped into the mixing and stirring tank by a sludge pump, wherein the liquid mixture contained no oil.
The mixing and stirring tank 203 is used for adding a flocculating agent into the liquid mixture to coagulate and precipitate organic matters in the liquid mixture, so as to obtain wastewater and flocculated precipitate.
The flocculant comprises an organic flocculant which can be an organic polymer flocculant, a natural organic polymer flocculant and a microbial flocculant. The organic polymer flocculant has the characteristics of small dosage, low scum yield, strong flocculation capacity, easy separation of flocs, and good oil and suspended matter removing effect. The microbial flocculant has the characteristics of no secondary pollution and convenient use. The microbial flocculant has the characteristics of high efficiency, no toxicity and no secondary pollution of biodegradability and safety.
The MBR membrane water treatment tank 204 is used for treating the wastewater and wastewater to obtain standard discharge water; in this embodiment, MBR, also called Membrane bioreactor (Membrane Bio-Reactor), is a new water treatment technology combining a Membrane separation unit and a biological treatment unit. According to the structure of the membrane, the membrane can be divided into a flat membrane, a tubular membrane, a hollow fiber membrane and the like, and according to the membrane aperture, the membrane can be divided into a microfiltration membrane, an ultrafiltration membrane, a nanofiltration membrane, a reverse osmosis membrane and the like. The MBR membrane water treatment tank is a sewage treatment tank provided with a membrane bioreactor. And the MBR membrane water treatment tank is used for treating the wastewater to obtain clean water meeting the discharge standard.
And the hydraulic cylinder 205 is used for performing filter pressing treatment on the flocculation precipitate to obtain high-pressure briquetting kitchen waste residues.
In this embodiment, the pores are evenly and suitably distributed in the wall of the hydraulic cylinder 205. And (3) carrying out high-pressure operation on the flocculated precipitate through a hydraulic cylinder to obtain the kitchen waste residue with filter pressing water and high-pressure briquetting. The kitchen waste residues of the high-pressure briquetting contain very low acetic acid, hot pepper and salt, and the effect of using the kitchen waste residues as raw materials can be ignored and not influenced.
Optionally, the hydraulic cylinder 205 is further configured to perform filter pressing treatment on the flocculation precipitate to obtain filter pressing water, and place the filter pressing water into the mixing and stirring tank for secondary treatment;
the mixing and stirring tank 203 is also used for adding a flocculating agent into the filter pressing water to enable organic matters in the filter pressing water to be coagulated and precipitated.
Like this, further carry out sewage treatment to the filter-pressing water for the organic matter solidifies the sediment, avoids appearing secondary pollutant, improves the sewage treatment effect.
The kitchen waste treatment system in the embodiment of the disclosure comprises a mixing container, a three-stage oil separation tank, a mixing and stirring tank, an MBR membrane water treatment tank and a hydraulic cylinder which are sequentially connected in a through manner; the mixing container is used for placing pasty particles formed by crushing the kitchen waste, and water is poured into the mixing container to dilute and dissolve the pasty particles to obtain mixed liquid; the third-stage oil separation tank is used for standing the mixed liquid for a preset time to form a grease layer and a liquid mixture; the oil wiper at the upper part of the third-stage oil separation tank is used for collecting oil; the sludge pump is arranged at the bottom of the third-stage oil separation tank and is used for pumping the liquid mixture into the mixing and stirring tank; the mixing and stirring tank is used for adding a flocculating agent into the liquid mixture to solidify and precipitate organic matters in the liquid mixture to obtain wastewater and flocculation precipitates; the MBR membrane water treatment tank is used for treating wastewater and wastewater to obtain standard discharge water; and the hydraulic cylinder is used for performing filter pressing treatment on the flocculated precipitate to obtain high-pressure pressed kitchen waste residues. Through the scheme disclosed by the invention, the kitchen waste treatment time is short, odor and wastewater are not generated and are recycled completely, no other secondary hazards exist, the salt content of the obtained kitchen waste residues of the high-pressure briquetting is low, no acetic acid is contained, no pepper is contained, the fertilizer can meet the organic fertilizer standard of the original salt content international regulation, the kitchen waste residues after briquetting contain a large amount of protein and starch, and the resource utilization efficiency can be effectively improved.
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.
Claims (10)
1. A kitchen waste treatment method is characterized by comprising the following steps:
crushing the kitchen waste into pasty particles, and placing the pasty particles into a mixing container;
pouring water into the mixing container, and diluting and dissolving the pasty particles to obtain a mixed liquid;
placing the mixed liquid into a third-stage oil separation tank and standing for a preset time to form a grease layer and a liquid mixture;
collecting the grease through an oil wiper at the upper part of the third-stage oil separation tank;
pumping the liquid mixture into a mixing and stirring tank through a sludge pump at the bottom of the third-stage oil separation tank;
adding a flocculating agent into the mixing and stirring tank to enable organic matters in the liquid mixture to be coagulated and precipitated to obtain wastewater and flocculated precipitates;
pumping the wastewater into an MBR membrane water treatment tank for wastewater treatment to obtain standard discharge water, and discharging or recycling the standard discharge water;
and pumping the flocculated precipitate into a hydraulic cylinder with micropores for filter pressing treatment, and extruding water to obtain the high-pressure pressed kitchen waste residues.
2. The kitchen waste treatment method according to claim 1, characterized in that the pasty particles have a diameter of less than 10 mm.
3. The kitchen waste treatment method according to claim 1, characterized in that the method further comprises:
heating the mixing container by a first heater to dilute and dissolve the pasty particles in the water.
4. The kitchen waste treatment method according to claim 1, characterized in that the method further comprises:
and heating the mixed liquid by a second heater of the three-stage oil separation tank, and standing the heated mixed liquid for a preset time to fully separate out the grease.
5. The kitchen waste treatment method according to any one of claims 1 to 4, further comprising:
and pumping the flocculated precipitate into a hydraulic cylinder for filter pressing treatment, then obtaining filter pressing water, putting the filter pressing water into the mixing and stirring tank for secondary treatment, and adding a flocculating agent into the mixing and stirring tank to enable organic matters in the filter pressing water to be coagulated and precipitated.
6. A kitchen waste treatment system, characterized by comprising: a mixing container, a three-stage oil separation tank, a mixing and stirring tank, an MBR membrane water treatment tank and a hydraulic cylinder with micropores which are sequentially communicated;
the mixing container is used for placing pasty particles formed by crushing the kitchen waste, and water is poured into the mixing container to dilute and dissolve the pasty particles to obtain mixed liquid;
the third-stage oil separation tank is used for standing the mixed liquid for a preset time to form a grease layer and a liquid mixture;
the oil wiper at the upper part of the third-stage oil separation tank is used for collecting the grease;
the sludge pump at the bottom of the third-stage oil separation tank is used for pumping the liquid mixture into the mixing and stirring tank;
the mixing and stirring tank is used for adding a flocculating agent into the liquid mixture to enable organic matters in the liquid mixture to be coagulated and precipitated to obtain wastewater and flocculated precipitates;
the MBR membrane water treatment tank is used for treating the wastewater to obtain standard discharge water, and the standard discharge water is discharged or recycled;
and the hydraulic cylinder is used for performing filter pressing treatment on the flocculation precipitate and extruding water to obtain the kitchen waste residues of the high-pressure pressing block.
7. The kitchen waste treatment system according to claim 6, characterized in that said pasty particles have a diameter of less than 10 mm.
8. The kitchen waste treatment system according to claim 6, further comprising:
and a first heater for heating the mixing container to dilute and dissolve the pasty particles in the water.
9. The kitchen waste treatment system according to claim 6, wherein said tertiary oil separation tank includes a secondary heater
And the second heater is used for heating the mixed liquid, and the heated mixed liquid is kept stand for a preset time so as to be convenient for fully separating out the grease.
10. The kitchen waste treatment system according to any one of claims 6 to 9, wherein the hydraulic cylinder is further configured to perform pressure filtration treatment on the flocculated precipitate to obtain a pressure filtration water, and the pressure filtration water is placed into the mixing and stirring tank for further treatment;
and the mixing and stirring tank is also used for adding a flocculating agent into the filter pressing water to enable the organic matters in the filter pressing water to be solidified and precipitated.
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