CN108787699B - In-situ resource treatment method and system for stock garbage - Google Patents

In-situ resource treatment method and system for stock garbage Download PDF

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Publication number
CN108787699B
CN108787699B CN201810496247.5A CN201810496247A CN108787699B CN 108787699 B CN108787699 B CN 108787699B CN 201810496247 A CN201810496247 A CN 201810496247A CN 108787699 B CN108787699 B CN 108787699B
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reactor
garbage
treatment
aerobic biological
membrane unit
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CN108787699A (en
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刘建伟
田洪钰
高柳堂
徐嵩
陈雪威
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Beijing University of Civil Engineering and Architecture
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Beijing University of Civil Engineering and Architecture
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B09DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09BDISPOSAL OF SOLID WASTE
    • B09B3/00Destroying solid waste or transforming solid waste or contaminated solids into something useful or harmless
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/007Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by irradiation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/32Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by electrical effects other than those provided for in group B01D61/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/84Biological processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water, or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/281Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/442Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06Contaminated groundwater or leachate
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • C02F3/302Nitrification and denitrification treatment
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

The invention discloses an in-situ resource treatment method and a system for stock garbage, wherein the system comprises the following steps: conveying the garbage in the temporary garbage storage area to a plate feeder; the plate feeder is sequentially connected with the first crushing device and the rotary screen; a first outlet of the drum screen is connected with a winnowing device; a first outlet of the winnowing device is connected with a first crushing device, and a second outlet is sequentially connected with a second magnetic separation device, a liquid type drum screen and a dewatering device; the outlet of the dehydration device is connected with the first inlet of the aerobic biological drying reactor; a second outlet of the rotary screen is connected with the first magnetic separation device and the relaxation screen; wherein, the outlet of the relaxation sieve is connected with the second inlet of the aerobic biological drying reactor; the outlet of the aerobic biological drying reactor is connected with an organic fertilizer compression and packaging device; the aerobic biological drying reactor is also connected with a percolate treatment system and a deodorization system; and the temporary storage area of the garbage is also connected with a leachate treatment system, so that the generation of secondary pollution can be avoided, and the high resource utilization of the stored garbage can be realized.

Description

In-situ resource treatment method and system for stock garbage
Technical Field
The invention relates to the technical field of stock waste treatment, in particular to an in-situ resource treatment method and system for stock waste.
Background
Along with the rapid development of economy and society in China and the continuous expansion of urbanization scale, the production amount of municipal domestic garbage is increased day by day. Landfill is one of the garbage disposal modes with more applications, and is widely applied in China. In the coming years, more and more landfills will enter the closing stage. The problems of environmental pollution, land encroachment and the like caused by refuse landfills and stored refuse thereof hinder the green and healthy development of cities, attract increasingly close attention of people, and the storage refuse remediation is urgent.
At present, the conventional technologies for domestic garbage management comprise in-situ sealing treatment, remote transfer treatment, remote screening treatment and the like, and the three conventional technologies respectively have the following problems: 1. the construction period of the in-situ sealing treatment is short, the effect is quick, the investment and operation cost is low, the operation is simple, the land resources after the sealing treatment can be reused, but if the geological condition of the field is complex and the underground water is abundant, the in-situ sealing treatment can cause the percolate to be in an uncontrollable state and possibly cause pollution to the underground water; 2. the problem of pollution of a simple refuse landfill can be thoroughly solved by remote site transfer treatment, the original site can be developed and utilized again, but the transfer cost of the refuse is high, and secondary pollution can be caused in the refuse transportation process; 3. although the allopatric screening treatment technology can better realize the reclamation and reduction of the garbage, the method has the defects of local collapse or settlement of a landfill, high transportation cost, secondary pollution caused by the transportation process, increased load of a receiving site and the like.
Therefore, the in-situ resource treatment of the inventory waste is increasingly paid attention. However, although the existing technology for treating the stored garbage can realize the reclamation and the harmlessness of the garbage to a certain extent, the reclamation effect is not good, and only the sorting and reclamation of the stored garbage are concerned, so that the leachate and the malodorous gas generated in the process of treating the stored garbage are less considered, and certain secondary pollution exists.
Therefore, how to provide an in-situ treatment method and system for the stored garbage with good recycling effect and no secondary pollution is a problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides an in-situ resource treatment method and system for the stored garbage, which considers the resource reutilization in the stored garbage treatment process and the treatment of leachate and malodorous gas, and has good resource effect and no secondary pollution.
In order to achieve the purpose, the invention adopts the following technical scheme:
an in-situ resource treatment method for stock garbage comprises the following steps:
s1: putting the mined storage garbage into a feeding machine from a temporary garbage storage area;
s2: and (4) conveying the garbage processed by the step S1 into a first crushing device for coarse crushing, conveying the garbage into a drum screen, and separating the garbage into two processes after the garbage is screened by the drum:
the first procedure is as follows: winnowing the oversize material of the drum screen by a winnowing device, enabling the screened light combustible material to fall into a second crushing device, uniformly crushing, and performing resource utilization on the crushed light combustible material to prepare RDF; sending the screened heavy materials into a second magnetic separation device, recycling the selected metals, and enabling the residual garbage to enter a liquid type drum screen; the oversize material of the liquid type drum screen enters an aerobic biological drying reactor after being dehydrated and dried by a dehydration device; using undersize of the liquid type drum sieve as nutrient soil for resource utilization;
the second procedure: enabling undersize materials of the drum screen to enter a first magnetic separation device, magnetically separating out formed metal, recycling resources, and enabling residual garbage to enter a flip-flow screen; feeding the substances on the relaxation sieve into an aerobic biological drying reactor; using the underflow of the flip-flow screen as nutrient soil for resource utilization;
s3: carrying out aerobic biological drying on the garbage entering the aerobic biological drying reactor through the step S2; the fertilizer slag generated by aerobic biological drying enters an organic fertilizer compression and packaging device for treatment; the leachate generated by aerobic biological drying and the leachate generated by the temporary garbage storage area enter a leachate treatment system for treatment; collecting the malodorous gas generated by aerobic biological drying, and sending the malodorous gas into a deodorization system for deodorization.
Preferably, the treatment step of the leachate specifically comprises:
s41: uniformly collecting percolate generated by aerobic biological drying, percolate generated in an organic fertilizer compression and packaging device and percolate generated in a garbage temporary storage area by a regulating tank, and treating the collected percolate in a denitrification reactor and a nitrification reactor; wherein reflux exists inside the nitration reactor and the denitrification reactor;
s42: the percolate treated by the step S41 enters a biomass charcoal adsorption pool to obtain percolate clear liquid;
s43: the percolated clear liquid obtained in the step S42 sequentially passes through a first precision filter, an ultrafiltration membrane module, a nanofiltration membrane module and a second precision filter; wherein a reflux exists between the ultrafiltration membrane module and the nitration reactor;
s44: the leachate treated in the step S43 enters a reverse osmosis membrane component, the effluent part enters a clear water tank, and the rest is discharged; and the water entering the clear water tank is reused for cleaning the ultrafiltration membrane unit, the nanofiltration membrane unit and the reverse osmosis membrane unit, after cleaning, the ultrafiltration membrane unit, the nanofiltration membrane unit and the reverse osmosis membrane unit are sequentially subjected to acid cleaning and alkaline cleaning by using an acid-base liquid storage tank, and finally, the water in the clear water tank is used for cleaning again.
Preferably, the method further comprises the following steps: discharging sludge generated after the treatment of the nitration reactor in the step S41 and the treatment of the biomass carbon adsorption tank in the step S42 into a sludge storage tank, then feeding the sludge into a sludge dewatering device, and recharging the dewatered and concentrated sludge into a temporary garbage storage area by a sludge pump; and refluxing the supernatant obtained after dehydration to the regulating tank.
Preferably, the deodorizing step comprises:
s51: the malodorous gas enters a malodorous gas absorption reactor; activated carbon is added into the malodorous gas absorption reactor;
s52: the malodorous gas treated in the step S51 enters a biological spraying and filtering reactor after being uniformly distributed by a gas distribution pipe and a gas distribution plate, and biological absorption and degradation reaction are generated in the biological spraying and filtering reactor;
s53: the malodorous gas treated in the step S52 enters a microwave UV photolysis reactor for oxidative decomposition;
s54: the malodorous gas treated in step S53 is introduced into a malodorous gas adsorption reactor, adsorbed and discharged.
Preferably, the method further comprises the following steps: collecting malodorous gas generated in the processes of garbage mining, transporting, screening and component recovery, and sending the malodorous gas into the malodorous gas absorption reactor for treatment.
An in-situ resource treatment system for inventory garbage comprises: the device comprises a garbage temporary storage area, a plate feeder, a first crushing device, a rotary screen, a winnowing device, a second crushing device, a first magnetic separation device, a relaxation screen, an aerobic biological drying reactor, an organic fertilizer compression and packaging device, a second magnetic separation device, a liquid rotary screen, a dehydration device, a percolate treatment system and a deodorization system;
conveying the garbage in the garbage temporary storage area to a plate feeder; the plate feeder is sequentially connected with the first crushing device and the rotary screen; the first outlet of the drum screen is connected with the air separation device; the first outlet of the winnowing device is connected with a second crushing device, and the second outlet is sequentially connected with the second magnetic separation device, the liquid type drum screen and the dewatering device; the outlet of the dehydration device is connected with the first inlet of the aerobic biological drying reactor;
a second outlet of the rotary screen is connected with the first magnetic separation device and the relaxation screen; wherein the outlet of the relaxation sieve is connected with the second inlet of the aerobic biological drying reactor; the outlet of the aerobic biological drying reactor is connected with the organic fertilizer compression and packaging device;
the aerobic biological drying reactor is also connected with the leachate treatment system and the deodorization system; and the garbage temporary storage area is also connected with the percolate treatment system.
Preferably, the leachate treatment system comprises: the device comprises a regulating tank, a denitrification reactor, a nitrification reactor, a biomass carbon adsorption tank, a first precision filter, an ultrafiltration membrane unit, a second precision filter, a nanofiltration membrane unit, a reverse osmosis membrane unit and a clean water tank which are connected in sequence;
wherein there is reflux between the nitration reactor and the denitrification reactor; backflow exists between the ultrafiltration membrane unit and the nitration reactor; the clear water tank respectively with the milipore filter unit, receive and filter the membrane unit with there is the backward flow between the reverse osmosis membrane unit, just milipore filter unit, receive the membrane unit and the reverse osmosis membrane unit all is connected with the acid-base liquid storage pot.
Preferably, the leachate treatment system further comprises: a sludge storage tank and a sludge dewatering device; the inlet of the sludge storage tank is connected with the outlets of the nitration reactor and the biomass charcoal adsorption tank; the outlet of the sludge storage tank is communicated with the sludge dewatering device; and backflow exists between the sludge dewatering device and the adjusting tank.
Preferably, the deodorization system includes: the device comprises a malodorous gas absorption reactor, and a biological spray filtration reactor, a microwave UV photolysis reactor and a malodorous gas adsorption reactor which are sequentially connected with the malodorous gas absorption reactor; wherein, the malodorous gas absorption reactor is connected with the aerobic biological drying reactor.
Preferably, the rubbish temporary storage area with the bottom of aerobic biological drying reactor all is provided with the filtration liquid preliminary treatment district, the filtration liquid preliminary treatment district has laid the gravel layer that the one deck particle size is 10 ~ 40 mm.
Preferably, the aerobic biological drying reactor comprises an aerobic biological drying reaction chamber and a percolate collecting and treating chamber, wherein a partition plate is arranged between the aerobic biological drying reaction chamber and the percolate collecting and treating chamber; the aerobic biological drying reaction chamber consists of a temperature control reaction zone, a stack stirring reaction zone and a ventilation and oxygen supply reaction zone;
a plurality of temperature probes are arranged in the temperature control reaction zone to monitor and control the temperature; aerobic bacteria are put into the pile stirring reaction zone, and a stirring device is arranged, wherein the aerobic bacteria are bacillus subtilis, bacillus coagulans or bacillus licheniformis; the aeration and oxygen supply reaction zone is arranged below the reactor body stirring reaction zone, the bottom of the aeration and oxygen supply reaction zone is provided with an air inlet pipe, an air distribution plate which is uniformly distributed with a plurality of air distribution holes is arranged above the air inlet pipe, the inlet of the air inlet pipe is connected into a fan for forced aeration, the aeration rate is kept to be 0.45-0.50L/(min kg), the aeration mode is controlled by a flowmeter, and the aeration mode is intermittent aeration.
The top of the percolate collecting and treating chamber is provided with a PVC percolate guide and discharge pipe with the diameter of 20-30mm, a percolate collecting device, the PVC percolate guide and discharge pipe and a percolate pretreatment region are sequentially arranged below the percolate collecting and treating chamber, and a filter screen is arranged above the percolate pretreatment region; and uniformly paving a gravel layer with the particle size of 10-40 mm in the leachate pretreatment area.
According to the technical scheme, compared with the prior art, the invention discloses the in-situ resource treatment method and the system for the stored garbage, the quantity reduction, resource utilization and harmless treatment are carried out on the stored garbage, the garbage landfill volume is reduced, and the land of the stored garbage landfill is effectively released.
The invention provides an in-situ resource treatment method and system for stock garbage, which comprises the following main components: the light combustible materials, metals, humus soil, muck and sandy soil are separated, wherein the light combustible materials are used for preparing RDF, the metals are recycled, and the sandy soil and muck which are used as nutrient soil are used for greening and soil improvement, and the humus soil is subjected to aerobic biological drying treatment to prepare the organic fertilizer. The invention improves the screening efficiency and the resource recycling efficiency of the stock garbage, realizes the reduction, the reclamation and the harmlessness of the stock garbage and provides guarantee for the resource utilization of the stock garbage.
Secondly, the humus soil in the stored garbage is recycled through aerobic biological drying treatment, so that the humus soil in the stored garbage is changed into an organic fertilizer, and the recycling treatment of the stored garbage is realized;
the leachate treatment in the invention adopts the processes of denitrification, nitrification, biomass carbon adsorption tank, first precision filtration, ultrafiltration, nanofiltration, second precision filtration and reverse osmosis, can better adapt to the water quality change of the stock landfill leachate, and has the advantages of high treatment efficiency, high resource utilization degree and the like;
the malodorous gas is treated by adopting a process of 'malodorous gas absorption, biological spray filtration, microwave UV photolysis and malodorous gas adsorption', and the deodorization system is an integrated deodorization device which can ensure the full contact of the malodorous gas and organisms, thereby ensuring the deodorization quality and the deodorization efficiency and reducing the floor area.
In conclusion, the in-situ resource treatment method and system for the stored garbage have wide application prospect and market prospect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart of an in-situ resource treatment method for the inventory waste provided by the invention;
FIG. 2 is a schematic diagram of an in-situ resource treatment system for the inventory waste provided by the invention;
FIG. 3 is a schematic view of a leachate treatment system provided in accordance with the present invention;
FIG. 4 is a schematic view of a deodorizing system according to the present invention;
FIG. 5 is a schematic view of an aerobic bio-drying reactor according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.
At present, the conventional technology of pretreatment and screening of the stored garbage comprises crushing, winnowing, magnetic separation, flotation and the like, and the stored garbage is mainly treated by mechanical crushing, mechanical shearing, wind power, magnetic force and the like. However, the efficiency is low and the degree of resource utilization is low depending on a single technology, and it is difficult to truly realize reduction, harmlessness and resource utilization of the garbage.
Secondly, although the existing technology for treating the stored garbage can realize the reclamation and the harmlessness of the garbage to a certain extent, the reclamation effect is not complete, and only the sorting and the reclamation of the stored garbage are concerned, so that the leachate and the malodorous gas generated in the process of treating the stored garbage are less considered, and certain secondary pollution exists.
Wherein, for the garbage percolate storage, the water quality components are complex and BOD5And factors such as high COD concentration, large change of water quality and water quantity, high ammonia nitrogen content, imbalance of proportion of microbial nutrient elements and the like, the simple traditional aerobic biological treatment process has high treatment difficulty for percolate, if the discharge requirement is high, the effluent quality cannot meet the requirement, the occupied area of the treatment process is large, and the denitrification requirement cannot be met.
For stored garbage malodorous gas, the traditional garbage malodorous gas treatment system only uses activated carbon for adsorption, often needs a large amount of activated carbon, has high cost and unsatisfactory adsorption effect. Based on the defects of the prior art, the invention provides the in-situ resource treatment method and the system for the stored garbage, which have high resource utilization degree and prevent secondary pollution.
Referring to the attached drawing 1, the embodiment of the invention discloses an in-situ resource treatment method for stored garbage, which is characterized by comprising the following steps:
s1: putting the mined storage garbage into a feeding machine from a temporary garbage storage area;
the method is characterized in that the method comprises the following steps of (1) mining the stored garbage in a garbage landfill site by using a hydraulic excavator, wherein the stored garbage landfill site is divided into three types: the early-stage mineralized refuse of the large-scale sanitary landfill site (the nearly stabilized old landfill site with nearly saturated reservoir capacity and early-stage landfill) is adopted as the early-stage mineralized refuse of the irregular refuse landfill site.
The mining of the irregular refuse landfill site is that the refuse landfill site is directly grabbed and placed to a refuse temporary storage area after being directly dug by a hydraulic excavator;
the mining of the substandard garbage sanitary landfill and the large-scale sanitary landfill is to use a bulldozer to push the covering soil on the selected mining units, then use a hydraulic excavator to mine, and the stop surface is arranged on the garbage layer. The bulldozer performs partial excavation work, can transport garbage in short distance, can push, pave and tedge the garbage, firstly piles the freshly mined wet garbage into ridges according to working units formed by dividing channels, drains partial moisture to reduce the moisture content to 75% -80%, and then transports the wet garbage to a temporary garbage storage area by a hydraulic excavator and the bulldozer;
the mined storage garbage is put into a garbage feeding hole of a feeder from a garbage temporary storage area through a loader for subsequent treatment; specifically, the feeder may be a plate feeder.
The invention adopts different pretreatment modes aiming at different refuse landfills, has stronger pertinence and lays a good foundation for the treatment of subsequent steps.
S2: and (4) conveying the garbage processed by the step S1 into a first crushing device for coarse crushing, conveying the garbage into a drum screen, and separating the garbage into two processes after the garbage is screened by the drum:
wherein the screen aperture of the drum screen is 30-40 mm, the rotating speed of the drum screen is 25-35 r/min, and the rotating speed of the rotating shaft is 150-200 r/min.
The first procedure is as follows: winnowing the oversize material of the drum screen by a winnowing device, enabling the screened light combustible material to fall into a second crushing device, uniformly crushing, and performing resource utilization on the crushed light combustible material to prepare RDF; sending the screened heavy materials into a second magnetic separation device, recycling the selected metals, and enabling the residual garbage to enter a liquid type drum screen; the oversize material of the liquid type drum screen enters an aerobic biological drying reactor after being dehydrated and dried by a dehydration device; using undersize of the liquid type drum sieve as nutrient soil for resource utilization;
in a specific embodiment, oversize materials with the diameter larger than 30mm enter a material inlet of an air separation device at a constant speed, an air inlet of the air separation device is arranged at the left lower part of the material inlet, the left side of the material inlet is an inclined plane, the inclination angle is 15-25 degrees, and light combustible materials with lighter weight are blown to a light material groove at the far end and then enter a second crushing device for uniform crushing under the action of air flow at the air inlet, and finally the light combustible materials with lighter weight are recycled to manufacture RDF; and because of the action of self inertia and gravity, the garbage with heavier mass directly falls into a nearby heavy material tank and then enters a second magnetic separation device for magnetic separation, finely-divided metals such as iron slag and the like are selected for recycling, the rest garbage enters a liquid type drum sieve, the sieve aperture of the liquid type drum sieve is 15mm, humus soil on the sieve with the size smaller than 15mm is dehydrated and dried by a dehydration device and then enters an aerobic biological drying reactor for aerobic biological drying treatment, and the undersize material larger than 15mm is sandy soil and muck which are used as nutrient soil for recycling.
The second procedure: enabling undersize materials of the drum screen to enter a first magnetic separation device, magnetically separating out formed metal, recycling resources, and enabling residual garbage to enter a flip-flow screen; feeding the substances on the relaxation sieve into an aerobic biological drying reactor; using the underflow of the flip-flow screen as nutrient soil for resource utilization;
in a specific embodiment, undersize with the diameter of less than 30mm enters a first magnetic separation device, magnetically separating formed metals such as iron nails, steel bars, iron sand and iron ware fragments for resource recycling, and then enabling the rest garbage to enter a flip-flow sieve, wherein the aperture of the flip-flow sieve is 15mm, the sieving angle is 15-25 degrees, the excitation intensity is 50g, and g represents the gravity acceleration; under the drive of the circular vibration of the screen body of the relaxation screen and the staggered movement of the floating balance beams of the screen machine, humus soil which is larger than 15mm above the screen enters an aerobic biological drying reactor for biological drying, and sand and residue soil which are smaller than 15mm below the screen are used as nutrient soil for resource utilization.
S3: carrying out aerobic biological drying on the garbage entering the aerobic biological drying reactor through the step S2; the fertilizer slag generated by aerobic biological drying enters an organic fertilizer compression and packaging device for treatment; the leachate generated by aerobic biological drying and the leachate generated by the temporary garbage storage area enter a leachate treatment system for treatment; collecting the malodorous gas generated by aerobic biological drying, and sending the malodorous gas into a deodorization system for deodorization.
The humus soil treated by the S2 enters through a feed inlet at the top of an aerobic biological drying reactor, the humus soil, aerobic bacteria, water and oxygen are fully mixed and contacted in a pile stirring reaction zone of the aerobic biological drying reactor by adopting an aerobic biological drying mode, wherein the aerobic bacteria are bacillus subtilis, bacillus coagulans or bacillus licheniformis, organic matters in the humus soil are subjected to metabolic decomposition by utilizing microorganisms to further cure the organic matters, and fertilizer residues generated by aerobic biological drying enter an organic fertilizer compression and packaging device; the fertilizer residues are dried, crushed, compressed and packaged in an organic fertilizer compression packaging device and then transported outside;
referring to fig. 5, the present invention further provides a schematic diagram of an aerobic bio-drying reactor in an in-situ recycling system for garbage inventory, comprising: the device comprises a feed inlet 501, heat preservation cotton 502, an oxygen content probe 503, a temperature probe 504, a stirring device 505, a gas distribution plate 506, an air inlet pipe 507, a partition plate 508, a PVC percolate guide and discharge pipe 509, a percolate collecting device 510, a filter screen 511, a sand gravel layer 512, a water discharge pipe 513, an air outlet 514, a deodorization system 515, a flow meter 516, a fan 517 and a discharge hole 518.
Specifically, the bottom of a percolate collecting and treating chamber in the aerobic biological drying reactor is provided with a PVC percolate guide and discharge pipe with the diameter of 20-30mm, a percolate pretreatment area is arranged at the bottom of the percolate collecting and treating chamber, and a gravel layer with the particle size of 10-40 mm is uniformly laid in the percolate collecting and treating chamber, so that percolate generated in the aerobic biological drying reactor can firstly enter a percolate treatment system after being simply pretreated, and an air outlet is formed in the top of the aerobic biological drying reactor, so that generated malodorous gas enters a deodorization system through a pipeline to be treated.
Specifically, the aerobic biological drying reactor is cylindrical, and heat insulation cotton with the thickness of 20-25mm is added at the periphery of the aerobic biological drying reactor to keep heat insulation, so that the influence of the environment on the drying process is avoided; the feed inlet of the aerobic biological drying reactor is positioned at the top, the discharge outlet is arranged at the side surface of the cylinder, and cover plates of the feed inlet and the discharge outlet are designed by flange plates and are connected by screws.
The aerobic biological drying reactor ingeniously synthesizes biological drying and the collection and pretreatment of percolate into a device, and particularly comprises an aerobic biological drying reaction chamber and a percolate collection treatment chamber, wherein a partition plate is arranged between the aerobic biological drying reaction chamber and the percolate collection treatment chamber;
wherein, the aerobic biological drying reaction chamber consists of a temperature control reaction zone, a pile stirring reaction zone, a ventilation and oxygen supply reaction zone and the like; a plurality of temperature probes are arranged in the temperature control reaction zone to control the temperature so as to ensure that the aerobic biological drying reaction chamber is an insulating system;
aerobic bacteria are put into the reactor stirring reaction zone, and a stirring device is arranged in the reactor stirring reaction zone, so that the humus soil, the aerobic bacteria, water and oxygen are fully mixed and contacted, wherein the aerobic bacteria are bacillus subtilis, bacillus coagulans or bacillus licheniformis, and microorganisms are utilized to carry out metabolic decomposition on organic matters in the humus soil, so that the organic matters are further cured;
the ventilation oxygen suppliment reaction zone is established in the below of reactor stirring reaction zone, is equipped with the intake pipe in the bottom of ventilation oxygen suppliment reaction zone, is equipped with the gas distribution board above ventilation oxygen suppliment reaction zone intake pipe, evenly is covered with a plurality of gas distribution hole above the gas distribution board, and the aperture is 2-4mm, and the intake pipe entry inserts the fan forced draft, and the air volume keeps 0.50L/(min kg), by flowmeter control, the ventilation mode is intermittent type formula ventilation, for example: ventilating for 15min, and standing for 45 min;
the top of the percolate collecting and treating chamber is provided with a PVC percolate guide and discharge pipe with the diameter of 20-30mm, a percolate collecting device is arranged below the PVC percolate guide and discharge pipe, percolate is guided to enter a percolate pretreatment area by the PVC percolate guide and discharge pipe below the percolate collecting device in sequence, and a filter screen is arranged above the percolate pretreatment area to fix a gravel layer; a layer of gravel layer with the particle size of 10-40 mm is uniformly laid in the leachate pretreatment area, so that leachate generated in the aerobic biological drying reactor can be simply pretreated firstly.
Specifically, the organic fertilizer compression packing apparatus is composed of three parts of drying, crushing and compression packing, so that the fertilizer slag generated from the aerobic biological drying reactor is processed to be made into fertilizer for outward transportation.
In order to further optimize the technical scheme, the treatment steps of the leachate specifically comprise:
s41: uniformly collecting percolate generated by aerobic biological drying, percolate generated in an organic fertilizer compression and packaging device and percolate generated in a garbage temporary storage area by a regulating tank, and treating the collected percolate in a denitrification reactor and a nitrification reactor; wherein reflux exists in the nitrification reactor and the denitrification reactor;
leachate generated in the temporary storage area of the garbage, the aerobic biological drying reactor and the organic fertilizer compression packing device is uniformly collected by the regulating reservoir and then enters the denitrification reactor and the nitrification reactor through the lift pump, system inlet water is fully mixed with nitrifying liquid return water and concentrated liquid return water under the stirring action of the stirrer in the denitrification reactor, total nitrogen is removed through denitrification under the low dissolved oxygen state, outlet water automatically flows into the nitrification reactor, the concentration of organic pollutants is greatly reduced, and the total nitrogen in a treatment system can be reduced due to the backflow in the nitrification reactor and the denitrification reactor;
s42: the percolate treated by the step S41 enters a biomass charcoal adsorption pool to obtain percolate clear liquid;
s43: the percolated clear liquid obtained in the step S42 sequentially passes through a first precision filter, an ultrafiltration membrane module, a nanofiltration membrane module and a second precision filter; wherein, reflux exists between the ultrafiltration membrane group and the nitration reactor;
the leachate enters a biomass charcoal adsorption tank added with a biomass charcoal adsorbent, the chromaticity of the leachate is reduced, and part of COD, BOD5 and NH4+ -N are removed; part of clear liquid with better water quality flows into the first precision filter from the mixed liquid and then enters the ultrafiltration membrane component, so that ultrafiltration water with better water quality is obtained; then, the leachate passes through a nanofiltration membrane component and a second precision filter to further separate organic matters with difficult degradation and larger molecular weight and part of ammonia nitrogen, and meanwhile, desalting treatment is further carried out;
s44: the leachate treated in the step S43 enters a reverse osmosis membrane component, the effluent part enters a clear water tank, and the rest is discharged; and the water entering the clear water tank is reused for cleaning the ultrafiltration membrane unit, the nanofiltration membrane unit and the reverse osmosis membrane unit, after cleaning, the acid-base liquid storage tank is used for sequentially carrying out acid cleaning and alkaline cleaning on the ultrafiltration membrane unit, the nanofiltration membrane unit and the reverse osmosis membrane unit, and finally, the water in the clear water tank is used for cleaning again.
The reverse osmosis membrane module adopts a roll type organic composite membrane, so that the discharged water enters the clear water tank after reaching the discharge standard, and the rest part is discharged.
In order to further optimize the above technical solution, the method further comprises: discharging sludge generated after the treatment of the nitration reactor in the step S41 and the treatment of the biomass carbon adsorption tank in the step S42 into a sludge storage tank, then feeding the sludge into a sludge dewatering device, and recharging the dewatered and concentrated sludge into a temporary garbage storage area by a sludge pump; and (4) refluxing the supernatant obtained after dehydration to an adjusting tank. And sludge generated after the treatment of the biomass carbon adsorption tank and the nitration reactor firstly enters the sludge storage tank and then enters the sludge dewatering device, and the dewatered and concentrated sludge is pumped back to the temporary garbage storage area by the sludge pump.
In order to further optimize the above technical solution, the deodorization processing step includes:
s51: the malodorous gas enters a malodorous gas absorption reactor; activated carbon is added into the malodorous gas absorption reactor; adding activated carbon into the malodorous gas absorption reactor to absorb part of malodorous gas;
s52: the malodorous gas treated in the step S51 enters a biological spraying and filtering reactor after being uniformly distributed by a gas distribution pipe and a gas distribution plate, and biological absorption and degradation reaction are generated in the biological spraying and filtering reactor;
s53: the malodorous gas treated in the step S52 enters a microwave UV photolysis reactor for oxidative decomposition; under the combination of multiple reaction mechanisms of ultraviolet photolysis, ozone oxidation, photocatalytic oxidation and microwave cracking, odor molecules in malodorous gas are oxidized and decomposed, and part of malodorous gas is purified;
s54: the malodorous gas treated in step S53 is introduced into a malodorous gas adsorption reactor, adsorbed and discharged.
In order to further optimize the above technical solution, the method further comprises: collecting the malodorous gas generated in the processes of garbage mining, transporting, screening and component recovery, and sending the malodorous gas into a malodorous gas absorption reactor for treatment.
Referring to fig. 2, the present invention further provides an in-situ resource treatment system for the stored garbage, comprising: the device comprises a garbage temporary storage area 1, a plate feeder 2, a first crushing device 3, a rotary screen 4, a winnowing device 5, a second crushing device 6, a first magnetic separation device 7, a relaxation screen 8, an aerobic biological drying reactor 12, an organic fertilizer compression and packaging device 13, a second magnetic separation device 9, a liquid rotary screen 10, a dehydration device 11, a percolate treatment system 14 and a deodorization system 15; in fig. 2, 16 denotes a light combustible refuse, 17 denotes a hydraulic shovel, and 18 denotes a loader.
Conveying the garbage in the temporary garbage storage area to a plate feeder; the plate feeder is sequentially connected with the first crushing device and the rotary screen; a first outlet of the drum screen is connected with a winnowing device; the first outlet of the winnowing device is connected with a second crushing device, and the second outlet is sequentially connected with a second magnetic separation device, a liquid type drum screen and a dewatering device; the outlet of the dehydration device is connected with the first inlet of the aerobic biological drying reactor;
a second outlet of the rotary screen is connected with the first magnetic separation device and the relaxation screen; wherein, the outlet of the relaxation sieve is connected with the second inlet of the aerobic biological drying reactor; the outlet of the aerobic biological drying reactor is connected with an organic fertilizer compression and packaging device;
the aerobic biological drying reactor is also connected with a percolate treatment system and a deodorization system; and the garbage temporary storage area is also connected with a percolate treatment system.
When specifically realizing, can realize the transportation of rubbish through hydraulic shovel, it is concrete, can adopt the excavator of novel hydraulic pressure gyration material grab ware, novel hydraulic pressure gyration material grab ware mechanism centre gripping rigidity is good, convenient operation, fault rate are low, when lightening operator intensity of labour, have improved security and work efficiency greatly. Correspondingly, a garbage feeding port with the same size as the novel hydraulic rotary material grabbing device is arranged above the plate feeder.
Specifically, the first crushing device is a double-cavity double-acting jaw crusher, the crushing ratio is 30-50, and jaw plates of the double-cavity double-acting jaw crusher are made of manganese steel containing more than 10% of manganese.
Specifically, the screen holes of the drum screen are circular, the screen hole diameter is 30mm, the rotating speed of the drum screen is 25-35 r/min, the rotating speed of the rotating shaft is 150-200 r/min, and the inclination angle is 5-8 degrees.
Specifically, the air inlet of the air separation device is arranged at the left lower part of the material inlet, the shape of the air inlet is a cone with a large inside and a small outside, the left side of the material inlet is an inclined plane, the inclination angle is 20 degrees, when the garbage stored in the air separation device falls into the air separation device from the material inlet at a constant speed, the light combustible material with light mass is blown to the light material groove at the far end under the action of the airflow at the air inlet, and the garbage with heavy mass directly falls into the heavy material groove at the near position under the action of self inertia and gravity.
Specifically, the first magnetic separation device separates the formed metals such as iron nails, steel bars, iron sand, ironware fragments and the like in the stored garbage from the garbage, improves the utilization rate of recyclable component resources, recycles the recyclable component resources, and is also beneficial to reducing machine abrasion in the later crushing process; the second magnetic separation device is used for separating the fine metal such as iron slag and the like in the garbage, so that the utilization rate of the recyclable component resources is further improved.
Specifically, the screen cloth of relaxation sieve is formed for the casting of high-elastic polyurethane material, has higher corrosion-resistant, wearing and tearing and fatigue resistance, unblock sieve mesh during the operation, the material is loose fast on the sieve, sieve effectual, characteristics such as operating efficiency height, and relaxation sieve has two kinds of motion states: firstly, the circular vibration of the screen body and secondly, the staggered movement of the floating balance beam of the screen machine, the floating balance beam generates the acceleration of 50g under the driving of the sub-resonance. The parameters of the relaxation sieve are as follows: the relaxation sieve has circular sieve pores, the sieve pore diameter is 15mm, the sieving angle is 15-25 degrees, and the excitation intensity is 50 g.
Specifically, the liquid type drum screen is structurally a cylindrical drum screen, the screen aperture of which is 15mm, is formed by rolling an iron plate into two cylinders, clamping a section of screen plate in the middle, and fixing the screen plate together through a plurality of angle irons, wherein one end of the cylindrical drum screen is supported on a roller which is fixed on a bracket; the other end of the cylindrical roller screen is supported on the driving roller, one end of the cylindrical roller screen, which is connected with the driving roller, is higher than one end of the supporting roller, the needle-shaped cleaner is fixed on one side of the cylindrical roller screen, the shoveling plate is welded on the inner edge of the cylindrical roller screen in a spiral shape, and the liquid roller sorting machine is placed in the water tank. The liquid type drum screen has the operation mode that after the garbage treated in the front enters the liquid type drum screen through the high end of the cylindrical drum screen, the garbage contacts the liquid in the water tank while being overturned and stirred, so that the silt in the material is dissolved in the water tank, and the effect of separating the silt from the slag soil is achieved.
Specifically, the garbage separated by the liquid type drum screen is dehydrated and dried in a dehydration device to obtain organic garbage with low moisture content, and the compression ratio value of the organic garbage is 1: 2-4. The dehydration device is a stacked screw dehydration device and comprises a filter cylinder, a screw shaft, a material inlet and outlet, a back pressure plate and the like, wherein the dehydration device utilizes a plurality of fixed rings and movable rings to be stacked alternately to form the filter cylinder, the built-in screw shaft pushes materials to move in the cylinder, the movable rings do circular motion in the radial direction by the rotating screw shaft and move relative to the fixed rings, the filter cylinder is not easy to block, liquid in the materials can be naturally discharged from a gap between the fixed rings and the movable rings at the front section of the filter cylinder, the volume in the screw cavity is continuously shrunk at the rear section of the filter cylinder, the internal pressure is continuously increased, and moisture in the materials is extruded. From the feed inlet to the discharge opening, the clearance of solid fixed ring and activity ring diminishes gradually, and the pitch of screw axis is littleer gradually, can produce very high pressure through the back pressure board, makes the material through abundant dehydration back, discharges from the discharge opening.
Referring to fig. 3, in order to further optimize the above technical solution, the leachate treatment system comprises: the device comprises a regulating tank, a denitrification reactor, a nitrification reactor, a biomass carbon adsorption tank, a first precision filter, an ultrafiltration membrane unit, a second precision filter, a nanofiltration membrane unit, a reverse osmosis membrane unit and a clean water tank which are connected in sequence;
wherein reflux exists between the nitration reactor and the denitrification reactor; backflow exists between the ultrafiltration membrane unit and the nitration reactor; and the clear water tank has reflux with the ultrafiltration membrane unit, the nanofiltration membrane unit and the reverse osmosis membrane unit respectively, and the ultrafiltration membrane unit, the nanofiltration membrane unit and the reverse osmosis membrane unit are connected with the acid-base liquid storage tank.
In order to further optimize the above technical solution, the leachate treatment system further comprises: a sludge storage tank and a sludge dewatering device; the inlet of the sludge storage tank is connected with the outlet of the nitrification reactor and the outlet of the biomass charcoal adsorption tank; the outlet of the sludge storage tank is communicated with a sludge dewatering device; and backflow exists between the sludge dewatering device and the adjusting tank.
Specifically, the water volume of the incoming water of the percolate is not uniform, an adjusting tank is arranged to buffer impact load possibly caused by nonuniform water inflow, meanwhile, a certain hydrolysis acidification function can be achieved for a longer hydraulic retention time, the biodegradability of the water quality is improved, and the effluent of the adjusting tank enters a nitrification reactor through a lift pump;
in a nitration reactor and a denitrification reactor, system inlet water, nitration liquid reflux water and concentrated liquid reflux water are fully mixed under the stirring action of a stirrer in the denitrification reactor, total nitrogen is removed through denitrification under the state of low dissolved oxygen, outlet water automatically flows into the nitration reactor, ammonia nitrogen in water is converted into nitrate nitrogen through full nitration reaction under the state of high dissolved oxygen in a nitration reaction stage, meanwhile, the concentration of organic pollutants is greatly reduced, reflux exists in the nitration denitrification system, the nitrate nitrogen generated in the nitration system flows back to the denitrification system and is converted into nitrogen, and the total nitrogen in a treatment system is reduced;
the denitrification reactor and the nitration reactor are both epoxy resin and steel anti-corrosion structures, and the technological parameters are as follows: the working time is 24 hours, the reflux ratio is 400 percent, the temperature is 20-40 ℃, and the pH value is 6.5-8.0;
the biomass charcoal adsorption tank takes biomass charcoal as an economic and environment-friendly adsorbent, can reduce the chromaticity of leachate, and remove part of COD and BOD5And NH4 +-N, the process parameters are: the adding amount of the biomass charcoal is 40-60 g/L, the temperature is 25-35 ℃, and the pH is 5.0-6.0;
the ultrafiltration membrane unit adopts an ultrafiltration membrane with the aperture of 0.03-0.05 pm, and the membrane flux is 65-70L/(m)2·h);
The water after the ultrafiltration membrane unit is treated is pressurized by a nanofiltration water supply pump and a booster pump to enter a nanofiltration membrane unit, and various pollution indexes are reduced to meet the emission requirement by utilizing the interception effect of a nanofiltration membrane component on solutes, and the process parameters are as follows: the working temperature is 20-30 ℃, the membrane flux is 1000L/h, a concentrated solution internal circulation system is adopted, and the recovery rate is more than 90%;
the reverse osmosis membrane unit adopts an imported anti-pollution roll type organic composite membrane, can effectively remove dissolved salts, colloids, microorganisms, organic matters and the like in water, and has the following technological parameters: the operating pressure is 1.5-1.6 MPa, the working temperature is 25 ℃, and the membrane flux is 900L/h;
the excess sludge generated by the biomass carbon adsorption tank and the nitration reactor automatically flows into a sludge dewatering system, the sludge in the sludge storage tank is lifted to enter a sludge dewatering device, and is dewatered to 80% by the sludge dewatering device to form a sludge cake, and finally the sludge cake is transported outwards for treatment, and the supernatant is pumped back to the denitrification reactor for continuous treatment;
the acid solution in the acid-base liquid storage barrel is a solution added with 2% of an acid membrane cleaning agent (citric acid), and the alkaline solution in the acid-base liquid storage barrel is a solution added with 2% of an alkaline membrane cleaning agent (sodium hydroxide). The membrane module cleaning operation: firstly, closing a water inlet valve, an outlet valve and a reflux valve of the membrane component, opening a drain valve to drain water stored in the membrane component, and opening a clean water inlet valve in a clean water tank of the membrane component to flush the membrane; secondly, soaking the membrane module in the acid-base solution storage barrel through an acid-base adding pump, starting a cleaning water pump for circulating stirring, adjusting the pH to 2-3, performing 45min circulating cleaning, and then performing clear water washing on the soaked or circularly cleaned membrane module; and thirdly, finally, soaking the membrane module in the alkaline solution storage barrel through an alkaline and acid adding pump, starting a cleaning water pump to circularly stir, adjusting the pH value to 10-11, executing circular cleaning for 45min, and then washing the soaked or circularly cleaned membrane module with clean water.
Referring to fig. 4, in order to further optimize the above technical solution, the deodorization system comprises: the device comprises a malodorous gas absorption reactor, and a biological spray filtration reactor, a microwave UV photolysis reactor and a malodorous gas adsorption reactor which are sequentially connected with the malodorous gas absorption reactor; wherein the malodorous gas absorption reactor is connected with the aerobic biological drying reactor.
Specifically, the deodorization system is an integrated malodorous gas treatment device which comprises a shell, wherein a malodorous gas absorption reaction zone, a biological spraying and filtering reaction zone, a microwave UV photolysis reaction zone and a malodorous gas adsorption reaction zone are arranged in the shell; the bottom of the malodorous gas absorption reaction area is inserted into an air inlet pipe, so that the malodorous gas is absorbed more fully, and active carbon is added to absorb part of the malodorous gas; the biological spraying and filtering reaction zone is internally provided with a composite filler, the filler is inoculated with high-efficiency heterotrophic bacteria, fungi, sulfur bacteria and other high-efficiency microorganisms, the upper part of the biological filtering zone is provided with a nutrient solution spraying pipe and a nutrient solution spraying head, and the lower part of the biological filtering zone is provided with a liquid discharge port; the microwave UV photolysis reaction zone generates microwaves through a high-voltage electric excitation microwave generator, the microwaves excite the electrodeless UV lamp tube to generate ultraviolet rays with the wavelength of 180-190 nm, and odor molecules in the malodorous gas are subjected to oxidative decomposition under the combination of various reaction mechanisms of ultraviolet photolysis, ozone oxidation, photocatalytic oxidation and microwave cracking, so that the effect of purifying the gas is achieved; the malodorous gas adsorption reaction area is filled with an activated carbon adsorbent and is provided with an air outlet.
In order to further optimize the technical scheme, the temporary garbage storage area and the bottom of the aerobic biological drying reactor are both provided with a leachate pretreatment area, and a gravel layer with the particle size of 10-40 mm is laid in the leachate pretreatment area.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (6)

1. An in-situ resource treatment method for stock garbage is characterized by comprising the following steps:
s1: putting the mined storage garbage into a plate feeder from a temporary garbage storage area;
s2: and (4) conveying the garbage processed by the step S1 into a first crushing device for coarse crushing, conveying the garbage into a drum screen, and separating the garbage into two processes after screening by the drum screen:
the first procedure is as follows: winnowing the oversize material of the drum screen by a winnowing device, enabling the screened light combustible material to fall into a second crushing device, uniformly crushing, and performing resource utilization on the crushed light combustible material to prepare RDF; sending the screened heavy materials into a second magnetic separation device, recycling the selected metals, and enabling the residual garbage to enter a liquid type drum screen; the oversize material of the liquid type drum screen enters an aerobic biological drying reactor after being dehydrated and dried by a dehydration device; using undersize of the liquid type drum sieve as nutrient soil for resource utilization;
the second procedure: enabling undersize materials of the drum screen to enter a first magnetic separation device, magnetically separating out formed metal, recycling resources, and enabling residual garbage to enter a flip-flow screen; feeding the substances on the relaxation sieve into an aerobic biological drying reactor; using the underflow of the flip-flow screen as nutrient soil for resource utilization;
s3: carrying out aerobic biological drying treatment on the garbage entering the aerobic biological drying reactor through the step S2; the fertilizer slag generated by aerobic biological drying enters an organic fertilizer compression and packaging device for treatment; the leachate generated by aerobic biological drying and the leachate generated by the temporary garbage storage area enter a leachate treatment system for treatment; collecting malodorous gas generated by aerobic biological drying, and sending the malodorous gas into a deodorization system for deodorization;
wherein, the treatment steps of the percolate specifically comprise:
s41: uniformly collecting leachate generated by aerobic biological drying and leachate generated by a temporary garbage storage area through a regulating tank, and treating the collected leachate and leachate in a denitrification reactor and a nitrification reactor; wherein reflux exists inside the nitration reactor and the denitrification reactor;
s42: the percolate treated by the step S41 enters a biomass charcoal adsorption pool to obtain percolate clear liquid;
s43: the percolation clear liquid obtained in the step S42 sequentially passes through a first precision filter, an ultrafiltration membrane unit, a nanofiltration membrane unit and a second precision filter; wherein reflux exists between the ultrafiltration membrane unit and the nitration reactor;
s44: the leachate treated in the step S43 enters a reverse osmosis membrane unit, the effluent part enters a clear water tank, and the rest is discharged; the water entering the clear water tank is reused for cleaning the ultrafiltration membrane unit, the nanofiltration membrane unit and the reverse osmosis membrane unit, after cleaning, an acid-base liquid storage tank is used for sequentially carrying out acid cleaning and alkaline cleaning on the ultrafiltration membrane unit, the nanofiltration membrane unit and the reverse osmosis membrane unit, and finally, the water in the clear water tank is used for cleaning again;
the deodorization treatment step comprises the following steps:
s51: the malodorous gas enters a malodorous gas absorption reactor; activated carbon is added into the malodorous gas absorption reactor;
s52: the malodorous gas treated in the step S51 enters a biological spraying and filtering reactor after being uniformly distributed by a gas distribution pipe and a gas distribution plate, and biological absorption and degradation reaction are generated in the biological spraying and filtering reactor;
s53: the malodorous gas treated in the step S52 enters a microwave UV photolysis reactor for oxidative decomposition;
s54: the malodorous gas treated in step S53 is introduced into a malodorous gas adsorption reactor, adsorbed and discharged.
2. The in-situ resource treatment method for the inventory waste as claimed in claim 1, further comprising: discharging sludge generated after the treatment of the nitration reactor in the step S41 and the treatment of the biomass charcoal adsorption tank in the step S42 into a sludge storage tank, then feeding the sludge into a sludge dewatering device, and recharging the dewatered and concentrated sludge into a temporary garbage storage area by a sludge pump; and refluxing the supernatant obtained after dehydration to the regulating tank.
3. The in-situ resource treatment method for the inventory waste as claimed in claim 1, further comprising: collecting malodorous gas generated in the processes of garbage mining, transporting, screening and component recovery, and sending the malodorous gas into the malodorous gas absorption reactor for treatment.
4. An in-situ resource treatment system for stock waste is characterized by comprising: the device comprises a garbage temporary storage area, a plate feeder, a first crushing device, a rotary screen, a winnowing device, a second crushing device, a first magnetic separation device, a relaxation screen, an aerobic biological drying reactor, an organic fertilizer compression and packaging device, a second magnetic separation device, a liquid rotary screen, a dehydration device, a percolate treatment system and a deodorization system;
conveying the garbage in the garbage temporary storage area to a plate feeder; the plate feeder is sequentially connected with the first crushing device and the rotary screen; the first outlet of the drum screen is connected with the air separation device; the first outlet of the air separation device is connected with a second crushing device, and the second outlet of the air separation device is sequentially connected with the second magnetic separation device, the liquid type drum screen and the dehydration device; the outlet of the dehydration device is connected with the first inlet of the aerobic biological drying reactor;
a second outlet of the rotary screen is connected with the first magnetic separation device and the relaxation screen; wherein the outlet of the relaxation sieve is connected with the second inlet of the aerobic biological drying reactor; the outlet of the aerobic biological drying reactor is connected with the organic fertilizer compression and packaging device;
the aerobic biological drying reactor is also connected with the leachate treatment system and the deodorization system; the garbage temporary storage area is also connected with the leachate treatment system;
wherein the leachate treatment system comprises: the device comprises a regulating tank, a denitrification reactor, a nitrification reactor, a biomass carbon adsorption tank, a first precision filter, an ultrafiltration membrane unit, a second precision filter, a nanofiltration membrane unit, a reverse osmosis membrane unit and a clean water tank which are connected in sequence;
wherein there is reflux between the nitration reactor and the denitrification reactor; backflow exists between the ultrafiltration membrane unit and the nitration reactor; backflow exists among the clear water tank, the ultrafiltration membrane unit, the nanofiltration membrane unit and the reverse osmosis membrane unit respectively, and the ultrafiltration membrane unit, the nanofiltration membrane unit and the reverse osmosis membrane unit are connected with an acid-base liquid storage tank;
the leachate treatment system further comprises: a sludge storage tank and a sludge dewatering device; the inlet of the sludge storage tank is connected with the outlets of the nitration reactor and the biomass charcoal adsorption tank; the outlet of the sludge storage tank is communicated with the sludge dewatering device; and backflow exists between the sludge dewatering device and the adjusting tank;
the deodorization system includes: the device comprises a malodorous gas absorption reactor, and a biological spray filtration reactor, a microwave UV photolysis reactor and a malodorous gas adsorption reactor which are sequentially connected with the malodorous gas absorption reactor; wherein, the malodorous gas absorption reactor is connected with the aerobic biological drying reactor.
5. The in-situ resource treatment system for the inventory waste according to claim 4, wherein the temporary waste storage area and the bottom of the aerobic biological drying reactor are both provided with a leachate pretreatment area, and the leachate pretreatment area is paved with a gravel layer with a particle size of 10-40 mm.
6. The in-situ resource treatment system for the inventory waste as claimed in claim 4, wherein the aerobic biological drying reactor comprises an aerobic biological drying reaction chamber and a percolate collecting and treating chamber, and a partition plate is arranged between the aerobic biological drying reaction chamber and the percolate collecting and treating chamber; the aerobic biological drying reaction chamber consists of a temperature control reaction zone, a stack stirring reaction zone and a ventilation and oxygen supply reaction zone;
a plurality of temperature probes are arranged in the temperature control reaction zone to monitor and control the temperature; aerobic bacteria are put into the pile stirring reaction zone, and a stirring device is arranged, wherein the aerobic bacteria are bacillus subtilis, bacillus coagulans or bacillus licheniformis; the reactor is characterized in that the ventilation and oxygen supply reaction area is arranged below the reactor body stirring reaction area, the bottom of the ventilation and oxygen supply reaction area is provided with an air inlet pipe, an air distribution plate which is uniformly distributed with a plurality of air distribution holes is arranged above the air inlet pipe, the inlet of the air inlet pipe is connected with a fan for forced ventilation, the ventilation quantity is controlled by a flowmeter, and the ventilation mode is intermittent ventilation;
the top of the percolate collecting and treating chamber is provided with a PVC percolate guide and discharge pipe with the diameter of 20-30mm, a percolate collecting device, the PVC percolate guide and discharge pipe and a percolate pretreatment region are sequentially arranged below the percolate collecting and treating chamber, and a filter screen is arranged above the percolate pretreatment region; and uniformly paving a gravel layer with the particle size of 10-40 mm in the leachate pretreatment area.
CN201810496247.5A 2018-05-22 2018-05-22 In-situ resource treatment method and system for stock garbage Active CN108787699B (en)

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