CN113511925A - Kitchen waste recycling treatment system and treatment method - Google Patents
Kitchen waste recycling treatment system and treatment method Download PDFInfo
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- CN113511925A CN113511925A CN202110709309.8A CN202110709309A CN113511925A CN 113511925 A CN113511925 A CN 113511925A CN 202110709309 A CN202110709309 A CN 202110709309A CN 113511925 A CN113511925 A CN 113511925A
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- 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
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- 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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Abstract
The invention provides a resourceful treatment system for kitchen waste, which comprises a pretreatment module, an anaerobic fermentation module and a post-treatment module; wherein: the pretreatment module comprises a sorting machine, a crusher and an oil-water separator, wherein a material discharge port of the sorting machine is connected with a feed port of the crusher, and a discharge port of the crusher is connected with a feed port of the oil-water separator; the anaerobic fermentation module comprises a first fermentation reaction tank and a second fermentation reaction tank, a feed inlet of the first fermentation reaction tank is connected with a water outlet and a discharge outlet of the oil-water separator, and a discharge outlet of the first fermentation reaction tank is connected with a feed inlet of the second fermentation reaction tank; the post-treatment module comprises a wet desulphurization tower, a dehydrogenation tank and a microbial electrolysis desalting pool. The invention also discloses a resourceful treatment method for the kitchen waste.
Description
Technical Field
The invention relates to the technical field of garbage treatment, in particular to a resourceful treatment system and a resourceful treatment method for kitchen garbage.
Background
The kitchen waste production amount of China increases year by year, the treatment situation is severe, and the gap of the rear-end treatment capacity is huge. Meanwhile, no matter collection, storage and transportation or terminal treatment, a large amount of manpower and material resources are required to be input, so that garbage peculiar smell, pathogenic bacteria breeding, urban appearance influence and garbage transportation cost are brought, and the existing method has the problems of high cost, large occupied area, low efficiency, low resource recovery rate and the like.
The current treatment technology of the kitchen waste mainly comprises a plurality of modes of landfill, incineration and aerobic composting, and the method treats the kitchen waste together by centralizing the kitchen waste, however, the actual treatment condition of the kitchen waste is not ideal in terms of economic benefit and environmental benefit.
Disclosure of Invention
In order to solve the technical problem of poor collection, storage and transportation and tail end treatment efficiency in the centralized treatment of the kitchen waste, the invention provides a kitchen waste recycling treatment system and a treatment method.
The invention adopts the following technical scheme:
a resourceful treatment system for kitchen waste comprises a pretreatment module, an anaerobic fermentation module and a post-treatment module; wherein:
the pretreatment module comprises a sorting machine, a crusher and an oil-water separator, wherein a material discharge port of the sorting machine is connected with a feed port of the crusher, and a discharge port of the crusher is connected with a feed port of the oil-water separator;
the anaerobic fermentation module comprises a first fermentation reaction tank and a second fermentation reaction tank, a feed inlet of the first fermentation reaction tank is simultaneously connected with a water outlet and a discharge outlet of the oil-water separator, and a discharge outlet of the first fermentation reaction tank is connected with a feed inlet of the second fermentation reaction tank; gas cabinets are arranged at the tops of the first fermentation reaction tank and the second fermentation reaction tank;
the aftertreatment module includes wet flue gas desulfurization tower, dehydrogenation jar and microbial electrolysis desalination pond, wherein contains dehydrogenase in the dehydrogenation jar, the inlet of wet flue gas desulfurization tower with the natural pond liquid exit linkage of second fermentation retort, the inlet of dehydrogenation jar with the liquid outlet of wet flue gas desulfurization tower is connected, the inlet of microbial electrolysis desalination pond with the liquid outlet of dehydrogenation jar is connected.
Furthermore, an airflow flowmeter for monitoring the biogas flow and a flow valve for controlling the flow are arranged on a gas pipeline in the gas holder.
Further, a sludge feeding port is also arranged on the first fermentation reaction tank.
Further, a heat pump and a heat exchanger are arranged, the heat source side of the heat pump is connected with the first fermentation reaction tank and/or the second fermentation reaction tank, and the heat output side of the heat pump is connected with the heat exchanger and is used for transferring heat generated by the first fermentation reaction tank and/or the second fermentation reaction tank to the heat exchanger.
Further, an infrared camera or a pH detector for monitoring temperature is at least arranged in the first fermentation reaction tank and/or the second fermentation reaction tank.
A method for resourceful treatment of kitchen waste by using a treatment system comprises the following steps:
adding the garbage into a sorting machine for sorting, and feeding the qualified sorted kitchen garbage into a crusher through a material discharge port of the sorting machine for crushing;
feeding the crushed kitchen waste into an oil-water separator for oil-water separation, discharging separated oil through an oil outlet, and feeding separated water and the kitchen waste into a first fermentation reaction tank;
anaerobic fermentation is carried out in the first fermentation reaction tank, the generated biogas enters a gas holder, and the residue enters the second fermentation reaction tank for secondary fermentation;
and the biogas generated by the second fermentation reaction tank enters a gas holder, and the generated biogas slurry is discharged and collected after sequentially passing through a wet desulphurization tower, a dehydrogenation tank and a microbial electrolysis desalting tank.
The invention has the beneficial effects that:
(1) by utilizing a mode of microbial anaerobic fermentation, the kitchen waste is converted into bioenergy and organic fertilizer, so that the aims of recycling, harmless treatment, energy conservation and emission reduction are fulfilled. Sorting and crushing the input kitchen waste through a pretreatment device, performing oil-water separation, then feeding the kitchen waste into an anaerobic fermentation tank, performing anaerobic fermentation by using anaerobic microorganisms to generate biogas and biogas slurry, converting the biogas and biogas slurry into electric energy and heat energy or directly serving as new energy according to the requirement, and finally performing desulfurization, desalination and dehydrogenation on the biogas slurry generated by the anaerobic fermentation tank through a post-treatment device to generate a liquid organic fertilizer;
(2) putting the activated sludge from a secondary sedimentation tank of a sewage treatment plant into the reactor for anaerobic digestion, and setting an infrared intelligent monitoring system in the operation process to monitor various operation parameters such as temperature, pH and fluid state in the reactor in real time so as to control the reasonable proportion of the co-digestion of the kitchen waste and the sludge.
Drawings
FIG. 1 is a schematic structural diagram of a kitchen waste recycling treatment system.
Description of reference numerals: 1. a preprocessing module; 11. a sorting machine; 12. a crusher; 13. an oil-water separator; 2. an anaerobic fermentation module; 21. a first fermentation reaction tank; 211. a gas holder; 212. a gas flow meter; 213. an infrared camera; 214. a pH detector; 215. a sludge inlet; 216. a flow valve; 22. a second fermentation reaction tank; 3. a heat pump; 31. a heat exchanger; 4. a post-processing module; 41. a wet desulfurization tower; 42. a dehydrogenation tank; 43. microbial electrolysis desalting pond.
Detailed Description
The present invention is further described with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the claims, and other alternatives which may occur to those skilled in the art are also within the scope of the claims.
Example 1
A resourceful treatment system for kitchen waste is shown in figure 1 and comprises a pretreatment module 1, an anaerobic fermentation module 2 and a post-treatment module 4; wherein:
the pretreatment module 1 comprises a sorting machine 11, a crushing machine 12 and an oil-water separator 13, wherein a material discharge port of the sorting machine 11 is connected with a material inlet of the crushing machine 12, a material discharge port of the crushing machine 12 is connected with a material inlet of the oil-water separator 13, after the garbage is put into the sorting machine 11, the sorting machine 11 sorts the garbage, the garbage which can be subjected to anaerobic fermentation is used as material garbage, the garbage which can not be subjected to anaerobic fermentation is used as non-material garbage, the material garbage is discharged through the material discharge port and enters the crushing machine 12 to be crushed, the garbage is crushed under the action of the crushing machine 12, the reaction area of anaerobic fermentation reaction is increased, and the fermentation reaction efficiency can be greatly improved; the crushed garbage enters an oil-water separator 13 for oil-water separation, oil is separated out and discharged through an oil outlet so as to reduce the oil entering an anaerobic fermentation tank, the oil is separated out and converted into biodiesel or other chemical industry raw materials, water quality is discharged through a water outlet, and materials are discharged from a discharge hole;
the anaerobic fermentation module 2 comprises a first fermentation reaction tank 21 and a second fermentation reaction tank 22, wherein a feed inlet of the first fermentation reaction tank 21 is connected with a water outlet and a discharge outlet of the oil-water separator 13, so that water and materials enter the first fermentation reaction tank 21, a discharge outlet of the first fermentation reaction tank 21 is connected with a feed inlet of the second fermentation reaction tank 22, and after the materials in the first fermentation reaction tank 21 are subjected to anaerobic fermentation by microorganisms, the rest part of the materials enter the second fermentation reaction tank 22 to be continuously re-fermented; the top parts of the first fermentation reaction tank 21 and the second fermentation reaction tank 22 are respectively provided with a gas holder 211, and the gas holders 211 are used for storing biogas generated by anaerobic fermentation, transporting the biogas to the outside for use, and converting the biogas into electric energy or other energy;
And an airflow flowmeter 212 for monitoring the flow of the biogas and a flow valve 216 for controlling the flow are arranged on a gas pipeline in the gas holder 211, and the reaction rates in the first fermentation reaction tank 21 and the second fermentation reaction tank 22 are judged according to the flow rate of the gas.
The first fermentation reaction tank 21 is also provided with a sludge inlet 215, the current kitchen waste as an organic substrate participates in anaerobic digestion reaction and has the problems of poor operation stability and the like, the municipal sludge as a co-digestion substrate can make up for the deficiency, the organic load rate, the biogas yield and the system stability of an anaerobic digestion system are effectively improved, and the anaerobic co-digestion treatment of the kitchen waste and the municipal sludge has the following advantages: the mixed material has more balanced C/N and enough amount of trace nutrient elements; the grease content is diluted, and the better system buffer capacity is achieved; the fermentation efficiency, the gas production efficiency and the system stability are effectively improved, so that the sludge adding port 215 is arranged on the first fermentation reaction tank 21, and municipal sludge can be added into the anaerobic reaction fermentation tank 21 through the sludge adding port 215 for co-digestion.
The heat pump 3 and the heat exchanger 31 are also provided, the heat source side of the heat pump 3 is connected with the first fermentation reaction tank 21 and/or the second fermentation reaction tank 22, and the heat output side is connected with the heat exchanger 31 for transferring the heat generated by the first fermentation reaction tank 21 and/or the second fermentation reaction tank 22 to the heat exchanger 31. Heat pump technology is a new energy technology that has received much attention worldwide in recent years. The well-known "pump" is a mechanical device that can increase the potential energy, such as a water pump that mainly pumps water from a low level to a high level. The heat pump is a device which can obtain low-level heat energy from air, water or soil in the nature and provide high-level heat energy which can be used by people by applying work through electric energy.
An infrared camera 213 or a pH detector 214 for monitoring temperature is further disposed in the first fermentation reaction tank 21 and/or the second fermentation reaction tank 22, and is used for monitoring the reaction state in the reaction tanks.
A kitchen waste recycling treatment method using the treatment system comprises the following steps:
the method comprises the following steps of (1) adding the garbage into a sorting machine 11 for sorting, and feeding qualified sorted kitchen garbage into a crusher 12 through a material discharge port of the sorting machine for crushing;
the crushed kitchen waste enters an oil-water separator 13 for oil-water separation, the separated oil is discharged through an oil outlet, and the separated water and the kitchen waste enter a first fermentation reaction tank 21;
anaerobic fermentation is carried out in the first fermentation reaction tank 21, the generated biogas enters a gas holder 211, and the residue enters the second fermentation reaction tank 22 for secondary fermentation;
biogas generated by the second fermentation reaction tank 22 enters the gas holder 211, and the generated biogas slurry is discharged and collected as fertilizer after sequentially passing through the wet desulphurization tower 41, the dehydrogenation tank 42 and the microbial electrolysis desalting tank 43.
It should be noted that the above-mentioned embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (6)
1. The utility model provides a kitchen garbage resourceful treatment system which characterized in that: comprises a pretreatment module (1), an anaerobic fermentation module (2) and a post-treatment module (4); wherein:
the pretreatment module (1) comprises a sorting machine (11), a crusher (12) and an oil-water separator (13), wherein a material discharge port of the sorting machine (11) is connected with a feed port of the crusher (12), and a discharge port of the crusher (12) is connected with a feed port of the oil-water separator (13);
the anaerobic fermentation module (2) comprises a first fermentation reaction tank (21) and a second fermentation reaction tank (22), a feed inlet of the first fermentation reaction tank (21) is simultaneously connected with a water outlet and a discharge outlet of the oil-water separator (13), and a discharge outlet of the first fermentation reaction tank (21) is connected with a feed inlet of the second fermentation reaction tank (22); gas cabinets (211) are arranged at the tops of the first fermentation reaction tank (21) and the second fermentation reaction tank (22);
aftertreatment module (4) include wet flue gas desulfurization tower (41), dehydrogenation jar (42) and microbial electrolysis desalination pond (43), wherein contain dehydrogenase in dehydrogenation jar (42), the inlet of wet flue gas desulfurization tower (41) with the natural pond liquid exit linkage of second fermentation retort (22), the inlet of dehydrogenation jar (42) with the liquid outlet of wet flue gas desulfurization tower (41) is connected, the inlet of microbial electrolysis desalination pond (43) with the liquid outlet of dehydrogenation jar (42) is connected.
2. The kitchen waste recycling treatment system according to claim 1, characterized in that: and a gas pipeline in the gas holder (211) is provided with a gas flow meter (212) for monitoring the flow of the biogas and a flow valve (216) for controlling the flow.
3. The kitchen waste recycling treatment system according to claim 1, characterized in that: the first fermentation reaction tank (21) is also provided with a sludge feeding port (215).
4. The kitchen waste recycling treatment system according to claim 1, characterized in that: a heat pump (3) and a heat exchanger (31) are further arranged, the heat source side of the heat pump (3) is connected with the first fermentation reaction tank (21) and/or the second fermentation reaction tank (22), and the heat output side of the heat pump is connected with the heat exchanger (31) and is used for transferring heat generated by the first fermentation reaction tank (21) and/or the second fermentation reaction tank (22) to the heat exchanger (31).
5. The kitchen waste recycling treatment system according to claim 1, characterized in that: and at least an infrared camera (213) or a pH detector (214) for monitoring temperature is arranged in the first fermentation reaction tank (21) and/or the second fermentation reaction tank (22).
6. A method for recycling kitchen waste by using the treatment system of claim 1, which comprises the steps of: the method comprises the following steps:
the garbage is added into a sorting machine (11) for sorting, and qualified sorted kitchen garbage enters a crusher (12) through a material discharge port of the sorting machine to be crushed;
the crushed kitchen waste enters an oil-water separator (13) for oil-water separation, the separated oil is discharged through an oil outlet, and the separated water and the kitchen waste enter a first fermentation reaction tank (21);
anaerobic fermentation is carried out in the first fermentation reaction tank (21), the generated biogas enters a gas holder (211), and the residue enters the second fermentation reaction tank (22) for secondary fermentation;
biogas generated by the second fermentation reaction tank (22) enters a gas holder (211), and the generated biogas slurry is discharged and collected after sequentially passing through a wet desulphurization tower (41), a dehydrogenation tank (42) and a microbial electrolysis desalting pool (43).
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| CN202110709309.8A CN113511925A (en) | 2021-06-25 | 2021-06-25 | Kitchen waste recycling treatment system and treatment method |
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| CN202110709309.8A CN113511925A (en) | 2021-06-25 | 2021-06-25 | Kitchen waste recycling treatment system and treatment method |
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2021
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