CN105502852A - Method for quickly treating refuse leachate of refuse incineration plant - Google Patents
Method for quickly treating refuse leachate of refuse incineration plant Download PDFInfo
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- CN105502852A CN105502852A CN201610050939.8A CN201610050939A CN105502852A CN 105502852 A CN105502852 A CN 105502852A CN 201610050939 A CN201610050939 A CN 201610050939A CN 105502852 A CN105502852 A CN 105502852A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Health & Medical Sciences (AREA)
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- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides a method for quickly treating refuse leachate of a refuse incineration plant. The method particularly comprises the steps that a biological flocculant is generated through specific microorganism bacillus sp. TC16, SS, COD and BOD in the refuse leachate are polymerized with the biological flocculant through the adsorption bridging action, the charge neutralizing action and the sweeping action to be precipitated, solid-liquid separation is performed by adopting solid-liquid separation equipment, separated residues can serve as raw materials for producing organic fertilizer, and separated filtrate achieves up-to-standard release after treated through biological oxidation. A treatment technology is composed of a biological coagulation and slag removal system and a biological oxidation system. The method has the advantages of being stable in effluent quality, low in operation cost, short in treatment time, high in removal rate on ammonia nitrogen and organic matter and free of secondary pollution, treatment on the refuse leachate of the refuse incineration plant can be effectively achieved, and water obtained through treatment can be applied to landscape greening or car washing.
Description
One, technical field
The present invention relates to technology of garbage disposal, particularly a kind of biological method of fast processing garbage burning factory percolate.
Two, background technology
The percolate of garbage burning factory generation mainly refers to rubbish in the stacking process of storage hole because organic matter rots, goes bad, ferments and ooze sewage caught on a filter.Different from the percolate of refuse landfill, the percolate of garbage burning factory belongs to fresh leachate, and BOD/COD ratio is relatively high, is easy to biochemical treatment.
Garbage burning factory percolate water quality characteristic: (1) suspended solid (SS) concentration is high.Incineration plant percolate SS concentration, usually at 5000-10000mg/L, even has many more than 10000mg/L; (2) high COD, high BOD/COD ratio.Because in garbage burning factory, garbage organism content is high, short in the residence time that refuse pit is stacked, organism has little time degraded, causes incineration plant percolate to have very high COD, COD
crat 40000-60000mg/L, BOD/COD ratio is greater than 0.5 simultaneously, has good biodegradability; (3) high NH3-N, incineration plant percolate NH3-N can be everlasting 300-1000mg/L; (4) calcium, magnesium isoconcentration are high, and percolate all contains higher hardness, usual Ca
2+at more than 3000mg/L, Mg
2+at more than 400mg/L.
According to the feature of garbage burning factory percolate, the treatment process of main application at present has materialization treatment process and biochemical treatment process.
Materialization treatment process mainly comprises coagulating sedimentation, chemical oxidation, electrolysis, absorption method, membrane sepn and ammonia aeration method, there is little by percolate water quality impact, that effluent quality is more stable advantage, but its deficiency is that Financial cost is high, easily cause secondary pollution, use usually used as pre-treatment or deep treatment method.
Biochemical process is a kind of method the most frequently used at present, main adopts microorganism to process waste water, at home and abroad all achieves and applies widely, has that working cost is low, advantage to environment non-secondary pollution.That commonly uses at present has Aerobic biological process, anaerobic biological treatment, aerobic/anaerobic combined method three types.
Because percolate composition is complicated, organic contamination substrate concentration is high, adopts single existing treatment technology to be often difficult to ensure the stability of effluent quality, therefore often adopts the combination process of several method in the majority.
Chinese invention patent application 200510102946.X discloses a kind of Apparatus for () and method therefor processing the percolate of biochemical garbage burning factory, its method adopts sealed centrifugal dehydration to carry out solid-liquid separation, remove suspended substance, adopt membrane bio-reaction system to carry out biochemical reaction and adopt the process of butterfly tubular type reverse osmosis unit reverse osmosis drop.Although whole system floor space is little, strong adaptability, effluent quality is good, and without bacterium and suspended substance, the advantages such as level of automation is high, security of system, running cost is high, needs regularly to carry out system flushing, and concentrated solution generation is large, therefore needs to process concentrated solution.
Chinese invention patent application 2011101087954 discloses a kind of refuse incineration plant percolate treatment system, adopt integrated process, comprise grid, settling pit, equalizing tank, reaction settling basin, intermediate pool, upflow anaerobic sludge blanket process, secondary A/O pond, membrane bioreactor, Fenton-electrochemical reactor, ABFT, settling tank, sludge thickener, integrated application physics and biochemical method process percolate, it is advantageous that lifting effluent quality, reduce running cost, but its deficiency is, adopt chemical coagulation-sedimentation method, adopt chemical floc, injected volume is too much, more chemically precipitated sludge can be produced, and complex treatment process, long processing period.
At present, China's garbage burning factory landfill leachate treatment investment is all comparatively large with running cost, depends on its scale, and landfill leachate treatment investment is general 5-10 per ton ten thousand yuan, and processing cost is in 50-80 unit per ton, and treatment cycle is longer, usually takes 10-15 days.Therefore, develop a kind of method of fast processing garbage burning factory percolate, to reduce construction and running cost, seem very important.
Three, summary of the invention
For the deficiency that prior art exists, the object of this invention is to provide a kind of method of fast processing garbage burning factory percolate, the method utilizes specific microorganism to produce high-performance bio flocculation agent, there is biofloculation with SS, the COD in percolate to react, and remove SS and most COD by solid-liquid separating machine, significantly reduce the operating load of rear end biochemical treatment system, for effective operation of biochemical treatment system creates good condition, percolate qualified discharge can be realized within a short period of time.
The technical solution used in the present invention is as follows:
The method of described a kind of fast processing garbage burning factory percolate, it is characterized in that utilizing specific microorganism bacillus sp.TC16 (depositary institution: China Committee for Culture Collection of Microorganisms's common micro-organisms center, preservation address: No. 3, Yard 1, BeiChen xi Road, Chaoyang District, Beijing City Institute of Microorganism, Academia Sinica, the preservation time: on December 20th, 2011, preserve numbering: CGMCCNo.5621, Classification And Nomenclature: bacillus sp.) produce biological flocculant, by absorption bridge linking effect, charge neutralization and volume sweep the SS acted on percolate, COD, there is polymerization and precipitate in BOD, solid-liquid separating equipment is adopted to carry out solid-liquid separation, isolated semi-oriented filter residue can be used as the starting material producing fertilizer, isolated clear filtrate realizes qualified discharge after further biological oxidation system.The method has that stable effluent quality, running cost are low, to ammonia nitrogen with organic clearance is high, non-secondary pollution, the advantage that the treatment time is short, effectively can realize the fast processing of garbage burning factory percolate.
The method of described a kind of fast processing garbage burning factory percolate, comprises biological coagulation slag removing system and biological oxidation system.Described biological coagulation slag removing system comprises grid/settling pit, equalizing tank, biofloculation pond, settling tank, collection mud sump, microorganism culturing pond, biological coagulation reaction tank, solid-liquid separation facility successively; Described biological oxidation system comprises water collecting basin, Aerobic Pond, anoxic biochemistry pool, second pond.
In above-mentioned biological treatment, the larger suspended substance of grid/settling pit filtering spam percolate, filtrate enters after equalizing tank carries out regulating pondage and water quality and enters biofloculation pond, microbial inoculum in microorganism culturing pond passes into and enters biofloculation pond into bacterium liquid pump, microorganism produces a large amount of biological flocculants, flocculation precipitation reaction is there is with SS, the COD in filtrate, SS in settling tank in precipitation removal percolate and insoluble organism, precipitating sludge enters collection mud sump, and supernatant liquor enters water collecting basin.The volume ratio of filtrate and bacterium liquid is 10: 1 ~ 50: 1 at 0.5 ~ 1.0h the residence time in biofloculation pond for leachate.
The mud of collection mud sump enters biological coagulation reaction tank, in this biological coagulation reaction tank, mud fully mixes under the effect of stirrer with microbial inoculum, add a small amount of nutrition agent (primarily of the nutritive elements such as N P and K Ca, Mg and Fe sulphur and a small amount of organic carbon source composition), adopt aerating system to provide O needed for microorganism
2, under microbial inoculum effect, mud internal junction Heshui is destroyed, and mud physico-chemical property obtains modification, improves the dewatering of mud.The volume ratio of mud and bacterium liquid is 5: 1 ~ 50: 1, and nutrition agent dosage is 1 ~ 10kg/m at 1.0 ~ 5.0h the residence time in biological coagulation reaction tank for mud
3.
After biological coagulation reaction, the dewatering of mud improves, and enters solid-liquid separating equipment, carries out mud-water separation.Wherein the separated press filtration of solids becomes semi-oriented mud cake, because it contains abundant organism and water ratio is low, can be directly broken and be prepared into fertilizer after thermophilic fermentation, and mud solid-liquid separation gained clear filtrate then enters water collecting basin.
Water collecting basin outlet is connected with biochemistry pool entrance, and biochemistry pool is secondary A/O technique, and every grade of A/O is made up of 1 anoxic pond (A pond) and 1 Aerobic Pond (O pond).Establish diving mixer to mix in described anoxic pond, described Aerobic Pond adopts roots blower to carry out oxygen supply.Biochemical unit waterpower is held and is stayed the time to be 2 ~ 3d, and holding wherein in 2 Aerobic Ponds stays the time to be respectively 18 ~ 24h, and holding in anoxic pond stays the time to be respectively 6 ~ 12h.Described dissolved oxygen in anoxic tank concentration is below 0.4mg/L, and Aerobic Pond dissolved oxygen concentration is more than 2mg/L.
Biochemistry pool muddy water mixed solution out enters second pond, carries out mud-water separation, and isolated water quality can carry out qualified discharge, and precipitating sludge partial reflux is to anoxic pond, and all the other excess sludges enter biological coagulation reaction tank and carry out filter-press dehydration process.
Owing to have employed such scheme, the present invention has the following advantages:
Specific microorganism is utilized to produce biological flocculant, be polymerized with SS, the COD in percolate by the effect of sweeping of absorption bridge linking effect, charge neutralization and volume and precipitate, relative to the inorganic or organic coagulants of employing, have that speed of response is fast, the advantage of non-secondary pollution, saving running cost.
Adopt biological coagulation slag removing system, only need 1.0 ~ 5.0h just can remove the COD etc. of more than 95% SS and more than 80%, significantly alleviate the load of subsequent biochemical process, the percolate whole treatment time is made to shorten to about 3d, and just can reach " integrated wastewater discharge standard " (GB8978-1996) mark completely, and effluent quality is stable.
Compared with Traditional materialized-biochemistry combination process, present method has that treatment cycle is short, working cost is low, the advantage of stable effluent quality.
Four, accompanying drawing explanation
After having read the specific embodiment of the present invention with reference to accompanying drawing, those skilled in the art will become apparent all respects of the present invention.Those skilled in the art should be understood that: these accompanying drawings only for coordinating embodiment that technical scheme of the present invention is described, and and are not intended to be construed as limiting protection scope of the present invention.Wherein,
Fig. 1 is the process flow sheet of the method for a kind of fast processing garbage burning factory of the present invention percolate.
Fig. 2 is the process flow sheet of an embodiment of the method for a kind of fast processing garbage burning factory of the present invention percolate.
Five, embodiment
Below in conjunction with accompanying drawing 2, the present invention is described in further detail.
A method for fast processing garbage burning factory percolate, comprises biological coagulation slag removing system and biological oxidation system.Biological coagulation slag removing system comprises grid/settling pit, equalizing tank, biofloculation pond, settling tank, collection mud sump, microorganism culturing pond, biological coagulation reaction tank, barrier film chamber-type press filter successively; Described biological oxidation system comprises water collecting basin, secondary A/O pond, second pond.
In above-mentioned biological treatment, larger suspended substance in grid/settling pit filtering spam percolate, filtrate enters after equalizing tank carries out the water yield and water quality regulation and enters biofloculation pond, microbial inoculum in microorganism culturing pond passes into and enters biofloculation pond into bacterium liquid pump, microorganism produces a large amount of biological flocculants, with SS, the COD in filtrate, flocculation precipitation reaction occurs.SS in settling tank in precipitation removal percolate and insoluble organism, precipitating sludge enters collection mud sump, and supernatant liquor enters water collecting basin.The useful volume in biofloculation pond is 25m
3, the hydraulic detention time of percolate is 0.5h, and the volume ratio of percolate and bacterium liquid is 20: 1.
The mud of collection mud sump enters biological coagulation reaction tank, in this biological coagulation reaction tank, mud fully mixes under the effect of stirrer with microbial inoculum, add a small amount of nutrition agent (primarily of the nutritive elements such as N P and K Ca, Mg and Fe sulphur and a small amount of organic carbon source composition), adopt aerating system to provide O needed for microorganism
2, under microbial inoculum effect, in mud, internal junction Heshui is destroyed, and mud obtains modification, improves the dewatering of mud.Biological coagulation reaction tank volume is 50m
3, hydraulic detention time is 3h.Microbial inoculum injected volume is 1: 10 with sludge volume ratio, and nutrition agent injected volume is 3kg/m
3.
After biological coagulation reaction, the dewatering of mud improves, and enters barrier film chamber-type press filter and carries out mud-water separation.Wherein the separated press filtration of solid part becomes the semi-oriented mud cake of water ratio less than 60%, because it contains abundant organism and water ratio is low, can directly broken after thermophilic fermentation prepare fertilizer, mud solid-liquid separation gained filtrate then enters water collecting basin.
Water collecting basin outlet is connected with biochemistry pool entrance, and biochemistry pool is secondary A/O technique, and every grade of A/O is made up of 1 anoxic pond (A pond) and 1 Aerobic Pond (O pond).Establish diving mixer to mix in described anoxic pond, described Aerobic Pond adopts roots blower to carry out oxygen supply.Biochemical unit waterpower is held and is stayed the time to be 2d, and it is 18h that holding wherein in 2 Aerobic Ponds stays the time respectively, and it is 6h that holding in anoxic pond stays the time respectively.Described dissolved oxygen in anoxic tank concentration maintains below 0.4mg/L, and Aerobic Pond dissolved oxygen concentration is moderate maintains more than 2mg/L.
Because the biodegradability of garbage burning factory percolate is good, secondary A/O biochemical treatment, not only utilizes the removal of ammonia nitrogen, also very favourable to organic removal.
Secondary A/O pond mud mixture out enters second pond and carries out precipitation water outlet, and through effluent standard mouth discharge supernatant liquor, the water outlet after process can be used for landscape planting or carwash.In second pond, partly precipitated sludge reflux is to Aerobic Pond, and all the other excess sludges drain into biological coagulation reaction tank and carry out the rear filter-press dehydration process of biological coagulation reaction.
Claims (5)
1. the method for a fast processing garbage burning factory percolate, it is characterized in that: utilize specific microorganism to produce biological flocculant, be polymerized with SS, COD, the BOD in percolate by the effect of sweeping of absorption bridge linking effect, charge neutralization and volume and precipitate, solid-liquid separating equipment is adopted to carry out solid-liquid separation, isolated filter residue can be used as the starting material producing fertilizer, and isolated filtrate realizes qualified discharge after further biological oxidation system process.
2. the method for fast processing garbage burning factory percolate as claimed in claim 1, is characterized in that: the treatment process of fast processing garbage burning factory percolate comprises biological coagulation slag removing system and biological oxidation system.
3. the method for fast processing garbage burning factory percolate as claimed in claim 2, is characterized in that: described biological coagulation slag removing system comprises grid/settling pit, equalizing tank, biofloculation pond, settling tank, collection mud sump, microorganism culturing pond, biological coagulation reaction tank, solid-liquid separation facility.
4. the method for fast processing garbage burning factory percolate as claimed in claim 2, is characterized in that: described biological oxidation system comprises water collecting basin, biochemistry pool, second pond.
5. the biological method of the fast processing garbage burning factory percolate according to right 1, is characterized in that: described specific microorganism bacillus sp.TC16, can produce high-performance bio flocculation agent.Percolate and specific microorganism generation biofloculation react, and both ratios are 10: 1 ~ 50: 1.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109574398A (en) * | 2018-12-26 | 2019-04-05 | 南京贝克特环保科技有限公司 | A kind of depth deslagging method of highly filled biogas slurry |
| CN110734146A (en) * | 2019-11-18 | 2020-01-31 | 深圳市承亿生物科技有限公司 | landfill leachate treatment method |
| CN113087303A (en) * | 2021-04-12 | 2021-07-09 | 武汉合创柯林环保有限公司 | Treatment method of household garbage station leachate |
| CN116144556A (en) * | 2023-03-23 | 2023-05-23 | 内蒙古农业大学 | Bacillus for treating monosodium glutamate wastewater, treating agent, and preparation method and application thereof |
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| CN1631820A (en) * | 2005-01-14 | 2005-06-29 | 北京大学 | Combined treatment method and system for landfill leachate |
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| CN101475249A (en) * | 2009-01-19 | 2009-07-08 | 浙江理工大学 | Method for treating cultivation wastewater by using microbial flocculant and compound fertilizer obtained thereby |
| CN101544447A (en) * | 2009-04-30 | 2009-09-30 | 郑鉴忠 | Technique for purifying organic sewage through bio-precipitation and purification method |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2000073220A1 (en) * | 1999-05-29 | 2000-12-07 | Choi Joo Sik | A disposal method for pig ordure |
| CN1631820A (en) * | 2005-01-14 | 2005-06-29 | 北京大学 | Combined treatment method and system for landfill leachate |
| CN101225405A (en) * | 2008-01-21 | 2008-07-23 | 西安建筑科技大学 | Method for producing microbial flocculant and method of use thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109574398A (en) * | 2018-12-26 | 2019-04-05 | 南京贝克特环保科技有限公司 | A kind of depth deslagging method of highly filled biogas slurry |
| CN110734146A (en) * | 2019-11-18 | 2020-01-31 | 深圳市承亿生物科技有限公司 | landfill leachate treatment method |
| CN113087303A (en) * | 2021-04-12 | 2021-07-09 | 武汉合创柯林环保有限公司 | Treatment method of household garbage station leachate |
| CN116144556A (en) * | 2023-03-23 | 2023-05-23 | 内蒙古农业大学 | Bacillus for treating monosodium glutamate wastewater, treating agent, and preparation method and application thereof |
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