CN202988914U - Device for treatment of landfill leachate - Google Patents

Device for treatment of landfill leachate Download PDF

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Publication number
CN202988914U
CN202988914U CN 201220420668 CN201220420668U CN202988914U CN 202988914 U CN202988914 U CN 202988914U CN 201220420668 CN201220420668 CN 201220420668 CN 201220420668 U CN201220420668 U CN 201220420668U CN 202988914 U CN202988914 U CN 202988914U
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treatment
percolate
absorption
activated carbon
biochemical treatment
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代晋国
宋乾武
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BEIJING BOLIYANG ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD.
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代晋国
宋乾武
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Abstract

The utility model discloses a device for treatment of landfill leachate, including a leachate collection system, a steady-state gas membrane absorption system device, a multi-stage AO biochemical treatment system device, and a modified carbon adsorption treatment system unit. The leachate is discharged after treatment by the steady-state gas membrane absorption system device, the multi-stage AO biochemical treatment system device, and the modified carbon adsorption treatment system device. The steady-state gas membrane absorption system device includes a landfill leachate pretreatment device and a gas membrane absorption device. The multi-stage AO biochemical treatment system device is composed of two grades or more biochemical treatment devices, which mainly includes a plurality of aerobic tanks and anoxic tanks. During working, water from a first grade aerobic tank is directly fed into a next anoxic tank, and finally 100% of water from a last aerobic tank is back to a first grade anoxic tank.

Description

A kind of device for the treatment of refuse percolate
Technical field
The utility model relates to the refuse treatment field, and water treatment field in particular more particularly is applied to the device of the percolate of the removal of hardly degraded organic substance and ammonia nitrogen in high density in consumer waste infiltration liquid.
Background technology
Since entering 21 century, China's rapid economic development, city size constantly enlarges, and urbanization process is constantly accelerated, however Municipal Domestic Garbage Output also sharply increases.According to statistics, at present China's municipal wastes year generation surpasses 1.4 hundred million tons, and annually produces per capita quantity of refuse daily and surpassed 1.1kg with 8% ~ 10% speed increment, and only the domestic refuse that produces every day of the big city such as Beijing, Shanghai just reaches 20,000 tons of left and right.China has become in the world, and rubbish surrounds one of the most serious country in city.The whole world is annual produces 4.9 hundred million tons of rubbish, and only China just produces nearly 1.5 hundred million tons of municipal wastess every year.
Percolate is that rubbish leaching, surface water and groundwater due to fermentation and precipitation in stacking and landfill process soaks the sewage that leaches.The percolate complicated component not only contains a large amount of organic substances, also contains ammonia nitrogen and the poisonous and hazardous pollutent of high density.And along with the landfill yard prolongation of working life, the concentration of ammonia nitrogen is more and more higher, and what have has even reached 5000mg/L.Too high ammonia nitrogen concentration has not only increased the load of percolate biochemical treatment system, also cause C/N to reduce, carbon source is not enough, the imbalance of microbial nutrition ratio, and the high density free ammonia that produces also can to the microorganisms restraining effect, affect the stable effectively operation of biochemical treatment system.
2009,654 the planned city domestic refuse amounts of clearing in the whole nation were 1.57 hundred million t, and approximately 7,000 ten thousand tons, county town and cities and towns amount to 2.2 hundred million tons of rubbish. the domestic refuse of China 90.5% is processed by the mode of landfill disposal.The percolate of refuse landfill be rubbish in stacking process over a long time, the sewage of a kind of high density that produces through a series of biochemical reaction.Its water quality characteristics is mainly that COD, ammonia nitrogen, heavy metal content are high, and the concentration of its COD is generally at 6000-10000mg/L.The water quality characteristic of percolate: high ammonia nitrogen, high concentration COD, difficult degradation, water quality are unstable, high toxicity and stench.The water quality of percolate is unstable, and along with the prolongation of landfill time, Organic Pollutants of Landfill Leachate concentration is progressively reducing, but more and more difficult degradation of residual organic substances.The concentration of ammonia nitrogen progressively raises, and last ammonia nitrogen concentration is higher than COD concentration.The pollution of 1 ton of percolate generation is equivalent to the pollution that 100 tons of sanitary sewages produce.According to measuring and calculating, China's domestic refuse can produce percolate more than 120,000 tons average every day, will produce serious pollution if directly be discharged in environment to surface water environment, groundwater environment, threatens simultaneously resident's drinking water safety.
2008 China carry out new percolate emission standard, require percolate must process on the spot qualified discharge.Technology that at present can qualified discharge is mainly to adopt reverse osmosis technology, but still there are a lot of problems in this Treatment Landfill Leachate, at first the concentrated solution that produces in application process can't be processed, pollution substance can not get basic the removal and has limited it and used widely, secondly reverse osmosis membrane easily stops up, membrane flux reduces very fast, need instantaneously changing, the 3rd, reverse osmosis technology investment running cost is higher, ten thousand yuan of calculating of domestic reverse osmosis technology treating refuse percolate percolate construction cost per ton 8-10, running cost are on average at the first meter of 50-60.
Higher running cost and cost of investment, also there is limitation in unique technology widespread use that can qualified discharge as the treating refuse percolate to make reverse osmosis technology.
Summary of the invention
For the deficiency that prior art exists, the utility model provides a kind of city domestic refuse percolation liquid treatment technology method.
To achieve these goals, the utility model is by the following technical solutions:
A kind of device for the treatment of refuse percolate is characterized in that: comprise leachate collecting device, stable state air film absorption system device, multistage AO biochemical treatment system device, Modified Activated Carbon absorption processing system device; Percolate is discharged after Modified Activated Carbon absorption processing system device is processed through stable state air film absorption system device, multistage AO biochemical treatment system device.
Described stable state air film absorption system device bag percolate pretreatment unit and air film absorption unit.
Described multistage AO biochemical treatment apparatus is comprised of the biochemical treatment apparatus more than 2 grades or 2 grades, biochemical treatment apparatus mainly comprises a plurality of Aerobic Ponds and anoxic pond, during work, the water outlet of first step Aerobic Pond directly enters the next stage anoxic pond, and last step Aerobic Pond water outlet 100% is back to the anoxic pond of the first step.
It comprises dissolving tank, reactive tank, settling bath, sand filter described Modified Activated Carbon absorbing treatment device.
In described Modified Activated Carbon absorbing treatment device, sorbent material is powdery, and particle diameter is greater than 60 orders.
Described Modified Activated Carbon absorption treating device comprises reaction of high order pond and settling tank; Adopt adverse current absorption during the device operation, namely adsorbent stream to opposite with the percolate water (flow) direction, forms the cross-flow attitude.
Described anoxic pond arranges stirrer, and biologic packing material is set in Aerobic Pond.
The utility model patent has following features:
1, all require index all can satisfy country " household refuse landfill sites pollution control criterion " (GB 16889-2008) to require emission standard result fully;
2, present technique has good economy, and the present technique cost of investment is at ten thousand yuan/t of 3-4, and running cost is at 30-50 unit/t;
3, present technique strong adaptability goes for newly-built, transformation conventional garbage percolation liquid treating system, thereby guarantees the stably reaching standard discharging of percolate;
4, present technique can realize that resource reclaims, and technology by adopting sulfuric acid to the absorption of ammonia nitrogen, reaches the resource recycling of ammonia nitrogen in processing high strength ammonia nitrogen-containing landfill leachate process, reduced the secondary pollution problem of ammonia nitrogen;
5, present technique is suitable for the exploitation of packaged equipment, and industrialization level is high;
6, the present technique suitability is extensive, all is fit to for " old-age group ", " youth " percolate.
Description of drawings
Fig. 1 is fundamental diagram of the present utility model.
Embodiment
The device of a kind for the treatment of refuse percolate as shown in Figure 1 comprises leachate collecting device, stable state air film absorption unit, multistage AO biochemical treatment apparatus, Modified Activated Carbon absorbing treatment device; Percolate is discharged after the Modified Activated Carbon absorbing treatment device is processed through stable state air film absorption unit, multistage AO biochemical treatment apparatus.During work, the percolate of collecting being carried out principle that the stable state air film absorbs, stablize the gaseous film isolation technique is that free ammonia in ammonia-containing water (percolate) gasifies and enters micropore on dewatering microporous film, and diffuse through microporous membrane and absorbed by acid to the opposite side of film and obtain high-purity high dense ammonium salt (ammonium sulfate, ammonium chloride, ammonium nitrate, primary ammonium phosphate or Secondary ammonium phosphate) byproduct.
At first percolate is collected, the stable state air film absorbs, air film absorption ammonia nitrogen technology has good removal ammonia nitrogen effect to carrying out with the percolate of collecting, the clearance of ammonia nitrogen is more than 98%, the clearance of COD is more than 40%, adopt pH regulator to adopt lime to regulate, pH regulator adopts micro-filtration, ultrafiltration as pre-treatment greater than more than 10 before the stable state air film absorbs, the microfiltration systems aperture is at 0.2 micron, and the ultrafiltration aperture is at 0.02 micron; Process through the laggard promoting the circulation of qi acid of micro-filtration uf processing absorption process, absorb the ammonia nitrogen in percolate, percolate after processing through air film carries out multistage AO biochemical treatment, multistage AO biochemical treatment is by the biochemical treatment more than 2 grades or 2 grades, after its first step biochemical treatment, water outlet directly enters next stage, carry out denitrification and process, last step water outlet 100% ~ 200% is back to the first step and carries out circular treatment; Carry out at last the Modified Activated Carbon adsorption deeply and process, the Modified Activated Carbon adsorption treatment is to discharge after multistage AO biochemical treatment percolate is later processed through reaction, precipitation, sand filtration.
During high-efficiency multi-stage AO biochemical treatment, biologic packing material is set in aerobic section, the biologic packing material top layer is aerobic environment, and internal layer is anaerobic environment, and skin carries out aerobic nitrification, and internal layer carries out anoxic denitrification, forms synchronous nitration and denitrification and removes ammonia nitrogen.Utilize different spaces microbial population microorganism that hardly degraded organic substance, ammonia nitrogen, total nitrogen in percolate are removed.
During multistage AO biochemical treatment, in the anoxic section, stirrer is set, dissolved oxygen is controlled at below 0.2mg/L, and the reaction times is controlled at 12h ~ 24h, and the Aerobic Pond dissolved oxygen is controlled at 1.0 ~ 2.0mg/L, and the reaction times is controlled at 24 ~ 96h.
Enter settling tank through the percolate water outlet after multistage AO biochemical treatment and carry out the mud-water separation processing, settling tank arranges mud discharging and activity sludge reflux, and return sludge ratio is controlled at 50% ~ 100%.
Utilize Modified Activated Carbon as sorbent material, dissolved organic matter in percolate to be removed, to guarantee the stably reaching standard board discharging of percolate, the clearance 70 ~ 80% of COD can guarantee that biochemistry pool goes out water treatment lower than below 100mg/L, and colourity can also be removed to colourless.
Modified Activated Carbon adds and adopts wet type to add method, according to the 10-30% concentration dilution, filters through sand filter after Modified Activated Carbon adsorption precipitation, and sand filter adopts quartz sand, and quartz sand particle size is at 1-2mm, and the sand filter filtering velocity is at 5-10m/h.The sand filtration cycle of operation is 12-24h, adopts air-water backwashing, wherein gas flushing 6-8L/m 2S, water backwash rate 12-15L/m 2S, the backwash time is controlled at 10-30min.
to sum up, at first this treatment technology device is to more than percolate employing lime adjusting pH value to 10, pass through micro-filtration, enter after ultrafiltration and processing and stablize the gaseous film absorption system, absorb through gaseous film, make ammonia nitrogen obtain more than 99% high efficiente callback, COD of waste leachate can be removed more than 40% simultaneously, phosphorus in percolate, heavy metal also can effectively be removed, after absorbing through air film, percolate enters multistage AO biochemical treatment system, through anoxic, hardly degraded organic substance in the percolate that aerobic different microorganisms environment makes, total nitrogen, BOD, ammonia nitrogen is further removed.Through after multistage AO biochemical treatment, garbage filter enters the Modified Activated Carbon adsorption system, with COD and other hardly degraded organic substances in the percolate of further place to go, COD remains on below 100mg/l, ammonia nitrogen is at 2-4mg/L, and BOD is lower than 10mg/L, and total nitrogen is lower than 40mg/L, total phosphorus below 3mg/L, thereby realize the percolate qualified discharge.
Technical finesse effect such as following table
Technical operation cost analysis such as following table
Economic and Efficiency Analysis:
Produce 120,000 tons of percolates every day according to China and calculate, adopt nearly 10,000,000,000 yuan of reverse osmosis technology treating refuse percolate investment, 3,000,000,000 yuan of annual processing costs nearly.And adopt GBA percolate technology, and cost of investment is at 4,800,000,000 yuan, and than adopting reverse osmosis technology can save approximately 6,000,000,000 yuan, annual approximately 15.4 hundred million yuan of running cost is saved nearly 500,000,000 yuan than reverse osmosis technology.Technology can reduce discharging approximately 26.4 ten thousand tons of COD every year, and ammonia nitrogen is about 2.2 ten thousand tons.

Claims (7)

1. the device of a treating refuse percolate, is characterized in that: comprise leachate collecting device, stable state air film absorption system device, multistage AO biochemical treatment system device, Modified Activated Carbon absorption processing system device; Percolate is discharged after Modified Activated Carbon absorption processing system device is processed through stable state air film absorption system device, multistage AO biochemical treatment system device.
2. the device of a kind for the treatment of refuse percolate according to claim 1, is characterized in that: described stable state air film absorption system device bag percolate pretreatment unit and air film absorption unit.
3, the device of a kind for the treatment of refuse percolate according to claim 1, it is characterized in that: described multistage AO biochemical treatment apparatus is comprised of the biochemical treatment apparatus more than 2 grades or 2 grades, biochemical treatment apparatus mainly comprises a plurality of Aerobic Ponds and anoxic pond, during work, the water outlet of first step Aerobic Pond directly enters the next stage anoxic pond, and last step Aerobic Pond water outlet 100% is back to the anoxic pond of the first step.
4, the device of a kind for the treatment of refuse percolate according to claim 1 is characterized in that: it comprises dissolving tank, reactive tank, settling bath, sand filter described Modified Activated Carbon absorbing treatment device.
5, the device of a kind for the treatment of refuse percolate according to claim 1 is characterized in that: in described Modified Activated Carbon absorbing treatment device, sorbent material is powdery, and particle diameter is greater than 60 orders.
6, the device of a kind for the treatment of refuse percolate according to claim 1 is characterized in that: described Modified Activated Carbon absorption treating device comprises reaction of high order pond and settling tank; Adopt adverse current absorption during the device operation, namely adsorbent stream to opposite with the percolate water (flow) direction, forms the cross-flow attitude.
7, the device of a kind for the treatment of refuse percolate according to claim 3 is characterized in that: described anoxic pond arranges stirrer, and biologic packing material is set in Aerobic Pond.
CN 201220420668 2012-08-23 2012-08-23 Device for treatment of landfill leachate Active CN202988914U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103319047A (en) * 2013-06-29 2013-09-25 惠州市众惠环保工程有限公司 Landfill leachate treatment system
CN103319048A (en) * 2013-06-29 2013-09-25 惠州市众惠环保工程有限公司 Method for recycling moisture from high-concentration organic sewage
CN104591502A (en) * 2015-01-29 2015-05-06 北京万邦达环保技术股份有限公司 Sewage treatment device used for sewage in coal chemical industry
CN106219884A (en) * 2016-08-27 2016-12-14 江苏维尔利环保科技股份有限公司 The processing method of high ammonia nitrogen landfill leachate

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103319047A (en) * 2013-06-29 2013-09-25 惠州市众惠环保工程有限公司 Landfill leachate treatment system
CN103319048A (en) * 2013-06-29 2013-09-25 惠州市众惠环保工程有限公司 Method for recycling moisture from high-concentration organic sewage
CN104591502A (en) * 2015-01-29 2015-05-06 北京万邦达环保技术股份有限公司 Sewage treatment device used for sewage in coal chemical industry
CN106219884A (en) * 2016-08-27 2016-12-14 江苏维尔利环保科技股份有限公司 The processing method of high ammonia nitrogen landfill leachate

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Effective date of registration: 20150623

Address after: 102209 Beijing city Changping District town Beiqijia Hongfu Science Park Building No. 4 2-2

Patentee after: BEIJING BOLIYANG ENVIRONMENTAL PROTECTION TECHNOLOGY CO., LTD.

Address before: 100012 Beijing city Chaoyang District Wali Yang Fang No. eight (Group) group

Patentee before: Dai Jinguo

Patentee before: Song Qianwu