CN112191650A - Resourceful treatment system and method for kitchen waste - Google Patents
Resourceful treatment system and method for kitchen waste Download PDFInfo
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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
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L11/00—Methods specially adapted for refuse
-
- 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
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/90—Apparatus therefor
- C05F17/957—Apparatus therefor using two or more serially arranged devices
-
- 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
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- 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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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- Biochemistry (AREA)
- Biotechnology (AREA)
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Abstract
The invention discloses a resourceful treatment system and a resourceful treatment method for kitchen waste.A waste sorting machine is connected with the output of a killing part in the system, the output of the waste sorting machine is respectively connected with a household waste treatment part and a crushing and extruding all-in-one machine, sorted sundries are sent to the household waste treatment part, and pre-meal waste and post-meal waste are sent to the crushing and extruding all-in-one machine in a time-sharing manner or are respectively sent to two crushing and extruding all-in-one machines; the output of the crushing and extruding integrated machine after the garbage before meals is sent into the crushing and extruding integrated machine is respectively connected with the kitchen biochemical treatment machine and the wastewater treatment part; the output of the crushing and extruding integrated machine after the fed food waste is respectively connected with the desalting and deoiling part and the wastewater treatment part; the output of the desalting and deoiling part is respectively connected with the wastewater treatment part and the kitchen biochemical treatment machine; the output of the kitchen biochemical treatment machine is respectively connected with the aerobic composting machine and the waste gas treatment part. The invention provides a comprehensive, efficient and safe microbial kitchen waste recycling method, which realizes harmless, environment-friendly and efficient recycling conversion.
Description
Technical Field
The invention belongs to the field of garbage treatment, and relates to a resourceful treatment system and method for kitchen garbage.
Background
The kitchen garbage is garbage generated in activities such as daily life, food processing, food service, unit catering and the like of residents, and comprises abandoned vegetable leaves, leftovers, fruit peels, egg shells, tea leaves, bones and the like, and the proportion of the kitchen garbage is about 30-55% of that of the household garbage. Although the amount of kitchen waste generated is large, the kitchen waste contains extremely high moisture and has a low calorific value, and therefore, the method is not suitable for resource disposal methods such as incineration power generation. The kitchen waste contains high organic matter content and is easily degraded by microorganisms, so that the utilization of the microorganisms for resource treatment is one of the current research hotspots.
In the research of recycling kitchen waste by using microorganisms, a plurality of difficulties are often faced. For example, as the national garbage classification propaganda work is promoted only a short time at present, the consciousness of residents is not very strong, and the resource treatment efficiency is low due to poor garbage classification; the kitchen waste contains high oil content and salt content, so that the microbial fermentation and the resource disposal are greatly hindered; at present, harmful viruses and the like may exist in kitchen garbage in severe epidemic situation and influenza. Therefore, a relatively perfect process method needs to be researched to solve the difficulties, so that the kitchen garbage can be completely recycled.
The kitchen waste recycling treatment technology in the prior art is not perfect, and at least the following problems exist in the treatment process:
(1) the problems of non-strict garbage classification, simple treatment process and the like exist, so that the resource conversion efficiency is low;
(2) the problems of secondary pollution and serious resource waste are easily caused in the treatment process;
(3) the problem of disinfection is not considered in the kitchen waste disposal process.
Disclosure of Invention
In order to solve the problems, the invention provides a kitchen waste recycling treatment system which comprises a sterilizing part, a waste sorting machine, a household waste treatment part, a crushing and extruding all-in-one machine, a kitchen biochemical treatment machine, a wastewater treatment part, a desalting and deoiling part, an aerobic composting machine and a waste gas treatment part, wherein,
the output of the sterilizing part is connected with a garbage sorting machine, the output of the garbage sorting machine is respectively connected with a household garbage disposal part and a crushing and extruding all-in-one machine, the sorted sundries are sent to the household garbage disposal part, and the pre-meal garbage and the post-meal garbage are sent to the crushing and extruding all-in-one machine in a time sharing mode or are respectively sent to two crushing and extruding all-in-one machines; the output of the crushing and extruding integrated machine after the garbage before meals is sent into the crushing and extruding integrated machine is respectively connected with the kitchen biochemical treatment machine and the wastewater treatment part; the output of the crushing and extruding integrated machine after the fed food waste is respectively connected with the desalting and deoiling part and the wastewater treatment part; the output of the desalting and deoiling part is respectively connected with the wastewater treatment part and the kitchen biochemical treatment machine; the output of the kitchen biochemical treatment machine is respectively connected with the aerobic composting machine and the waste gas treatment part.
Preferably, the pre-meal waste comprises fruits, vegetables, meat and seafood produced before and during cooking, and is free of oil and salt.
Preferably, the post-meal waste comprises cooked vegetables, meat, seafood and starches, including oily salts.
Preferably, the fermentation microbial inoculum in the kitchen biochemical treatment machine is 1% of EM microbial inoculum, the fermentation temperature is 45-55 ℃, the oxygen concentration is 12-18%, and the humidity is 45-55%.
Preferably, the humidity in the aerobic composting machine is 45-50%, the pH value is 6.5-7.5, the fermentation temperature is 45-60 ℃, and the oxygen concentration is 14-18%.
Preferably, the wastewater treatment part comprises a primary sedimentation tank, an adjusting tank, a secondary sedimentation tank, an anaerobic tank, an aerobic tank and a disinfection tank which are connected in sequence.
Preferably, the desalting and deoiling part comprises a mechanical washing machine and an oil-water separator, the oil content of the material passing through the desalting and deoiling part is less than 1%, and the water content is 55-65%.
Based on the purpose, the invention also provides a kitchen waste recycling treatment method, and the kitchen waste recycling treatment system comprises the following steps:
s10, the disinfection part disinfects the kitchen garbage;
s20, screening and classifying the kitchen garbage into sundries, pre-meal garbage and post-meal garbage through a garbage sorting machine;
s31, disposing the sundries as household garbage;
s32, feeding the pre-meal garbage into a crushing and extruding integrated machine for crushing and solid-liquid separation;
s41, feeding the separated solid into a kitchen biochemical treatment machine for primary fermentation;
s42, sending the separated liquid into a wastewater treatment part for treatment so as to ensure that TN and NH in the liquid3-N、TP、COD、BOD5And the chroma reaches the emission standard;
s51, sending the solid residue after the primary fermentation into an aerobic composting machine for secondary fermentation;
the liquid after the primary fermentation is sent to a wastewater treatment part to ensure that TN and NH in the liquid3-N、TP、COD、BOD5And the chroma reaches the emission standard;
s52, inputting the gas generated after primary fermentation into a waste gas treatment part for treatment, so that ammonia, trimethylamine, hydrogen sulfide, methyl mercaptan and carbon dioxide in the gas reach the emission standard;
s33, feeding the waste after meal into a crushing and extruding integrated machine for crushing and solid-liquid separation;
s43, sending the separated solid into a desalting and deoiling part for treatment to reduce the salinity and the oil content;
sending the solid residue after desalting and deoiling treatment into a kitchen biochemical treatment machine for primary fermentation; the liquid is sent into a wastewater treatment part for treatment, so that TN and NH in the liquid3-N、TP、COD、BOD5And the chroma reaches the emission standard; and refining the separated oil to obtain the biodiesel.
Preferably, the waste gas treatment part carries out treatment, which is sequentially carried out by cloth bag dust removal, activated carbon primary adsorption, UV photolysis ion deodorization and activated carbon secondary adsorption.
Preferably, the refining of the biodiesel from the removed oil is sequentially carried out by pretreatment, reaction kettle, stirring, precipitation separation impurity removal, alcohol recovery and filtration, wherein the pretreatment comprises dehydration, deodorization and purification; the environment in the reaction kettle is alcohol and catalyst, and the reaction temperature is 70 ℃.
Compared with the prior art, the invention realizes the technical effects of no toxicity in the whole process, avoidance of secondary pollution and efficient conversion of garbage classification multipath resources. The kitchen waste is subjected to multi-aspect recycling treatment, and at least the following beneficial effects are achieved:
1. the kitchen waste is classified into two kinds of waste after meals before and after meals, the waste is processed in different paths and is respectively converted into organic fertilizer and green substrate resource products after being processed for multiple times, grease generated in the processing process is converted into biodiesel after being processed, and three kinds of resource products with different types can be produced in the whole process.
2. Solid materials and grease are converted into recycling products in the process of the kitchen waste recycling treatment process, and the generated wastewater and waste gas are treated and then discharged up to the standard, so that the whole process has no secondary pollution, and the process is green and environment-friendly.
3. The source ultraviolet virus sterilization is carried out before kitchen waste disposal, so that potential safety hazards in the subsequent disposal process are avoided.
Drawings
FIG. 1 is a block diagram showing a configuration of a kitchen waste recycling system according to an embodiment of the present invention;
FIG. 2 is a flowchart illustrating steps of a kitchen waste recycling method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
On the contrary, the invention is intended to cover alternatives, modifications, equivalents and alternatives which may be included within the spirit and scope of the invention as defined by the appended claims. Furthermore, in the following detailed description of the present invention, certain specific details are set forth in order to provide a better understanding of the present invention. It will be apparent to one skilled in the art that the present invention may be practiced without these specific details.
System example 1
Referring to fig. 1, a kitchen waste recycling treatment system according to an embodiment of the present invention is shown, including a sterilizing unit 10, a waste sorting machine 20, a household waste treatment unit 31, a crushing and squeezing all-in-one machine 32, a kitchen biochemical treatment machine 41, a wastewater treatment unit 42, a desalting and deoiling unit 43, an aerobic composting machine 51, and an exhaust gas treatment unit 52,
the output of the sterilizing part 10 is connected with the garbage sorting machine 20, the output of the garbage sorting machine 20 is respectively connected with the household garbage disposal part 31 and the crushing and extruding integrated machine 32, the sorted sundries are sent to the household garbage disposal part 31, and the pre-meal garbage and the post-meal garbage are sent to the crushing and extruding integrated machine 32 in a time-sharing manner or are respectively sent to the two crushing and extruding integrated machines 32; the output of the crushing and extruding integrated machine 32 after the garbage before meal is sent is respectively connected with the kitchen biochemical treatment machine 41 and the wastewater treatment part 42; the output of the crushing and extruding integrated machine 32 after the fed food waste is respectively connected with the desalting and deoiling part 43 and the waste water treatment part 42; the output of the desalting and deoiling part 43 is respectively connected with the wastewater treatment part 42 and the kitchen biochemical treatment machine 41; the output of the kitchen biochemical treatment machine 41 is connected with an aerobic composting machine 51 and an exhaust gas treatment part 52 respectively.
In a specific embodiment, the pre-meal waste comprises fruits, vegetables, meat and seafood which are produced before and during cooking and does not contain oil and salt.
The food waste comprises cooked vegetables, meat, seafood and starch, and contains oil and salt.
The sterilizing part 10 is a waste conveying belt provided with an ultraviolet lamp tube for sterilizing kitchen waste by ultraviolet virus.
System embodiment 2
On the basis of the embodiment 1, after the classified pre-meal garbage is subjected to crushing and extruding action of the crushing and extruding all-in-one machine 32, the size of the solid material is controlled to be 2-3mm, the water content is controlled to be 55% -65%, and the pH value of the garbage is adjusted to be 6.5-7.5. The fermentation microbial inoculum in the kitchen biochemical treatment machine 41 is 1% of EM microbial inoculum, the fermentation temperature is 45-55 ℃, the oxygen concentration is 12-18%, and the humidity is 45-55%. Fermenting for 3-5 days in biochemical treatment equipment for kitchen, and discharging the fermented solid organic residue for secondary aerobic composting fermentation.
The humidity in the aerobic composting machine 51 is 45-50%, the pH value is 6.5-7.5, the fermentation temperature is 45-60 ℃, and the oxygen concentration is 14-18%. The fermentation time of the secondary aerobic composting is about 20-30 days, and the organic product after the secondary fermentation can be used for preparing organic fertilizer.
System example 3
Liquid generated in the process of treating materials by the crushing and extruding integrated machine 32 and the kitchen biochemical treatment machine 41 is treated by the wastewater treatment part 42 and then is discharged after reaching the standard. The wastewater treatment part 42 treats wastewater by adopting the combination of the primary sedimentation tank, the regulating tank, the secondary sedimentation tank, the anaerobic tank, the aerobic tank and the disinfection tank, and pollutants such as TN, NH3-N, TP, COD, BOD5, chromaticity and the like in the treated wastewater can stably reach the three-level standard of Integrated wastewater discharge Standard (GB 3-1996) and the B-level standard of wastewater discharge into urban sewer Water quality Standard (GB/T31962 2015) and then are discharged.
System example 4
On the basis of the aerobic composting of the solid residues and the wastewater treatment, after the postprandial garbage is output by the crushing and extruding all-in-one machine 32, the particle size of the solid material is 2-3mm and is input into the desalting and deoiling part 43, the desalting and deoiling part 43 comprises a mechanical washing machine and an oil-water separator, the salt content and the oil content of the material passing through the desalting and deoiling part 43 are both below 1%, and the water content is 55-65%. Inputting the separated solid residue into a kitchen biochemical treatment machine 41 for primary fermentation of materials, adding 1% of EM microbial inoculum in the fermentation process, wherein the fermentation temperature range of the equipment is 45-50 ℃, the oxygen concentration range is 12-18%, the humidity range of the cabin body of the equipment is 45-55%, and inputting the solid organic residue after primary fermentation into an aerobic composting machine 51 for secondary aerobic composting fermentation. In the secondary fermentation process, the humidity of the material is controlled to be 45-55%, the pH value is controlled to be 6.5-7.5, the fermentation temperature is 45-60 ℃, the oxygen concentration is 14-18%, the secondary fermentation time is about 20-30 days, and the organic product after the secondary fermentation is finished can be used for manufacturing a greening substrate.
System example 5
Similar to the situation after the pre-meal garbage treatment, the liquid generated in the process of treating the post-meal garbage by the crushing and extruding integrated machine 32 and the desalting and deoiling part 43 reaches the standard and is discharged after being treated by the wastewater treatment part 42, wherein the wastewater treatment part 42 treats the wastewater by adopting the combination of an oil separation tank, a primary sedimentation tank, an adjusting tank, a secondary sedimentation tank, an anaerobic tank, an aerobic tank and a disinfection tank, and TN and NH in the treated wastewater3-N、TP、COD、BOD5Pollutants such as chromaticity and the like can stably reach the three-level standard of the Integrated wastewater discharge Standard (GB8978-1996) and the B-level standard of the wastewater discharge to urban sewer Water quality Standard (GB/T31962 and 2015) for discharge.
The waste gas generated in the process of treating materials by the kitchen biochemical treatment machine 41 is treated by the waste gas treatment part 52 and then discharged after reaching the standard, the waste gas treatment part 52 treats the waste gas by adopting a combined process flow of cloth bag dust removal, activated carbon, UV photolysis ion deodorization and activated carbon, and the treated waste gas is discharged after malodorous pollutants such as ammonia, trimethylamine, hydrogen sulfide, methyl mercaptan, carbon dioxide, odor and the like can stably reach the standard of malodorous pollutant discharge standard (GB 1.554-93). Oil separated by the oil-water separator is refined by utilizing pretreatment (dehydration, deodorization and purification), a reaction kettle (adding alcohol + catalyst +70 ℃) + stirring reaction, precipitation separation and impurity removal, alcohol recovery and filtration.
Method embodiment
Referring to fig. 2, the method comprises the following steps:
s10, the disinfection part disinfects the kitchen garbage;
s20, screening and classifying the kitchen garbage into sundries, pre-meal garbage and post-meal garbage through a garbage sorting machine;
s31, disposing the sundries as household garbage;
s32, feeding the pre-meal garbage into a crushing and extruding integrated machine for crushing and solid-liquid separation;
s41, feeding the separated solid into a kitchen biochemical treatment machine for primary fermentation;
s42, sending the separated liquid into a wastewater treatment part for treatment so as to ensure that TN and NH in the liquid3-N、TP、COD、BOD5And the chroma reaches the emission standard;
s51, sending the solid residue after the primary fermentation into an aerobic composting machine for secondary fermentation;
the liquid after the primary fermentation is sent to a wastewater treatment part to ensure that TN and NH in the liquid3-N、TP、COD、BOD5And the chroma reaches the emission standard;
s52, inputting the gas generated after primary fermentation into a waste gas treatment part for treatment, so that ammonia, trimethylamine, hydrogen sulfide, methyl mercaptan and carbon dioxide in the gas reach the emission standard;
s33, feeding the waste after meal into a crushing and extruding integrated machine for crushing and solid-liquid separation;
s43, sending the separated solid into a desalting and deoiling part for treatment to reduce the salinity and the oil content;
sending the solid residue after desalting and deoiling treatment into a kitchen biochemical treatment machine for primary fermentation; the liquid is sent into a wastewater treatment part for treatment, so that TN and NH in the liquid3-N、TP、COD、BOD5And the chroma reaches the emission standard; and refining the separated oil to obtain the biodiesel.
In a specific embodiment, the waste gas treatment part carries out treatment, which is sequentially carried out by cloth bag dust removal, primary adsorption by activated carbon, UV photolysis ion deodorization and secondary adsorption by activated carbon. The extracted biodiesel is subjected to pretreatment, reaction kettle, stirring, precipitation separation and impurity removal, alcohol recovery and filtration in sequence, wherein the pretreatment comprises dehydration, deodorization and purification; the environment in the reaction kettle is alcohol and catalyst, and the reaction temperature is 70 ℃.
The system embodiments have been described and will not be described in detail.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A kitchen waste recycling treatment system is characterized by comprising a sterilizing part, a waste sorting machine, a household waste treatment part, a crushing and extruding all-in-one machine, a kitchen biochemical treatment machine, a wastewater treatment part, a desalting and deoiling part, an aerobic composting machine and a waste gas treatment part, wherein,
the output of the sterilizing part is connected with a garbage sorting machine, the output of the garbage sorting machine is respectively connected with a household garbage disposal part and a crushing and extruding all-in-one machine, the sorted sundries are sent to the household garbage disposal part, and the pre-meal garbage and the post-meal garbage are sent to the crushing and extruding all-in-one machine in a time sharing mode or are respectively sent to two crushing and extruding all-in-one machines; the output of the crushing and extruding integrated machine after the garbage before meals is sent into the crushing and extruding integrated machine is respectively connected with the kitchen biochemical treatment machine and the wastewater treatment part; the output of the crushing and extruding integrated machine after the fed food waste is respectively connected with the desalting and deoiling part and the wastewater treatment part; the output of the desalting and deoiling part is respectively connected with the wastewater treatment part and the kitchen biochemical treatment machine; the output of the kitchen biochemical treatment machine is respectively connected with the aerobic composting machine and the waste gas treatment part.
2. The kitchen waste recycling system of claim 1, wherein the pre-meal waste includes fruits, vegetables, meats and seafood that are produced before and during cooking, and is free of oil and salt.
3. The kitchen waste recycling system of claim 1, wherein the post-meal waste includes cooked vegetables, meats, seafood, and starches, including oily salts.
4. The kitchen waste recycling treatment system according to claim 1, wherein the fermentation microbial agent in the kitchen biochemical treatment machine is 1% of EM microbial agent, the fermentation temperature is 45-55 ℃, the oxygen concentration is 12-18%, and the humidity is 45-55%.
5. The kitchen waste recycling treatment system according to claim 1, wherein the humidity in the aerobic composting machine is 45% -50%, the pH value is 6.5-7.5, the fermentation temperature is 45-60 ℃, and the oxygen concentration is 14% -18%.
6. The kitchen waste recycling treatment system according to claim 1, wherein said waste water treatment section comprises a primary sedimentation tank, a conditioning tank, a secondary sedimentation tank, an anaerobic tank, an aerobic tank and a disinfection tank, which are connected in sequence.
7. The kitchen waste resourceful treatment system according to claim 1, wherein the desalting and deoiling section includes a mechanical water washer and an oil-water separator, and the oil content of the material passing through the desalting and deoiling section is 1% or less and the water content is 55% to 65%.
8. A method for recycling kitchen waste, characterized in that the kitchen waste recycling system according to any one of claims 1 to 7 is used, and comprises the steps of:
s10, the disinfection part disinfects the kitchen garbage;
s20, screening and classifying the kitchen garbage into sundries, pre-meal garbage and post-meal garbage through a garbage sorting machine;
s31, disposing the sundries as household garbage;
s32, feeding the pre-meal garbage into a crushing and extruding integrated machine for crushing and solid-liquid separation;
s41, feeding the separated solid into a kitchen biochemical treatment machine for primary fermentation;
s42, sending the separated liquid into a wastewater treatment part for treatment to ensure that the liquidTN, NH in bulk3-N、TP、COD、BOD5And the chroma reaches the emission standard;
s51, sending the solid residue after the primary fermentation into an aerobic composting machine for secondary fermentation;
the liquid after the primary fermentation is sent to a wastewater treatment part to ensure that TN and NH in the liquid3-N、TP、COD、BOD5And the chroma reaches the emission standard;
s52, inputting the gas generated after primary fermentation into a waste gas treatment part for treatment, so that ammonia, trimethylamine, hydrogen sulfide, methyl mercaptan and carbon dioxide in the gas reach the emission standard;
s33, feeding the waste after meal into a crushing and extruding integrated machine for crushing and solid-liquid separation;
s43, sending the separated solid into a desalting and deoiling part for treatment to reduce the salinity and the oil content;
sending the solid residue after desalting and deoiling treatment into a kitchen biochemical treatment machine for primary fermentation; the liquid is sent into a wastewater treatment part for treatment, so that TN and NH in the liquid3-N、TP、COD、BOD5And the chroma reaches the emission standard; and refining the separated oil to obtain the biodiesel.
9. The method according to claim 8, wherein the waste gas treatment part performs the treatment by sequentially performing cloth bag dust removal, primary adsorption by activated carbon, UV photolysis ion deodorization and secondary adsorption by activated carbon.
10. The method according to claim 8, wherein the refining of the biodiesel from the removed oil is sequentially carried out by pretreatment, reaction kettle, stirring, precipitation separation, impurity removal, alcohol recovery and filtration, wherein the pretreatment comprises dehydration, deodorization and purification; the environment in the reaction kettle is alcohol and catalyst, and the reaction temperature is 70 ℃.
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