CN102897972B - Domestic waste landfill site leachate zero-discharge system and treatment method - Google Patents
Domestic waste landfill site leachate zero-discharge system and treatment method Download PDFInfo
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- CN102897972B CN102897972B CN2012103702312A CN201210370231A CN102897972B CN 102897972 B CN102897972 B CN 102897972B CN 2012103702312 A CN2012103702312 A CN 2012103702312A CN 201210370231 A CN201210370231 A CN 201210370231A CN 102897972 B CN102897972 B CN 102897972B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Abstract
The invention relates to a domestic waste landfill site leachate zero-discharge treatment system and a treatment method. The system comprises a leachate back-irrigation area, a regulating tank, a leachate enhanced evaporation area and a circulating tank which are sequentially connected, wherein the leachate back-irrigation area is positioned in a landfill operation area where leachate raw liquor is located, and the leachate enhanced evaporation area and the circulating tank are positioned in a landfill site closure area; and the connection is realized by laying a pipeline. The treatment method disclosed by the invention has the advantages of simple process, good treatment effect and low treatment cost; and by evaporating water in leachate, the pollutant parts can be left in a vegetative cover of the evaporation area, sludge is periodically cleared, curing and landfill of pollutants can be realized, and zero-discharge of the leachate can be further realized.
Description
Technical field
What the present invention relates to is a kind of device and method of environmental protection technical field; be a kind of year steam output 〉=annual rainfall that is applicable to, the percolate generation in mean wind speed 〉=3m/s zone is less than consumer waste landfill percolate zero discharge treatment system and the treatment process of the middle-size and small-size landfill yard of 100t/d throughout the year.
Background technology
Along with the growth of urban population and the expansion of city size, the annual average rate of increase of China's domestic waste is up to 8%-10%, the rate of increase in some cities even up to 15%-20%.According to State Statistics Bureau's data presentation, China's domestic refuse in 2011 is cleared and is reached 1.58 hundred million tons, and wherein sanitary landfill amount is 1.06 hundred million tons, accounts for to clear 67% of total amount.And in the garbage loading embeading process, because the infiltration of precipitation and the biochemical degradation of rubbish have produced a kind of liquid-percolate that contains high concentration suspended matter and high density.
Percolate from garbage filling field has the high characteristic such as hazardous and noxious substances that contains of various, the complicated component in source, Pollutant levels, is one of main difficult problem of facing of environmental area.
The percolate conventional processes can be divided into 3 big classes: (a) biological degradation: aerobic and anaerobic technique; (b) physico-chemical process: (Coagulation and Flocculation, CF), sedimentation/flotation and air blow: (c) percolate and municipal effluent combination treatment and landfill yard recharge for chemical oxidation, absorption, chemical precipitation, coagulation/flocculation.
The method processing costs of adopting percolate and municipal effluent combination treatment and landfill yard to recharge is low, but recharge method still has the part percolate to need discharging, along with recharging accumulated time, ammonia nitrogen constantly accumulates in the percolate simultaneously, causes high-concentration ammonia nitrogenous wastewater to be difficult to handle.Adopt the chemical Treatment percolate to exist processing efficiency low, the shortcoming that disposal costs is high.Adopt biodegradable method disposing technique long flow path, need the long time, treatment effect often is difficult to reach the emission request of national regulation simultaneously.In addition, China upgraded " consumer waste filling and embedding pollution control criterion " in 2008, the percolate emission standard is proposed requirements at the higher level, especially require chemical oxygen demand (COD) (COD) to be lower than 100mg/L, ammonia nitrogen is lower than 25mg/L, and total nitrogen requires to be lower than 40mg/L, and this makes the difficulty of biological treatment and chemical treatment percolate improve more.
Find through the retrieval to prior art, Chinese patent literature CN1785850, open day 20060614, put down in writing a kind of " vegetative cover treatment method of long buring age buring field percolate ", this technology is earlier by irrigating load control requirement, be built with pedosphere that vegetation covers, be vegetation-pedosphere, with irrigation water delivery, cloth drainage facility, then with the percolate of BOD5 quality volumetric concentration less than 200mg/L, by irrigating water delivery, cloth drainage facility, every day 2 times or 1 time, irrigate according to following method: during temperature on average 〉=15 ℃, 15L/m2d; During 4～15 ℃ of temperature on average, 8L/m2d; During temperature on average＜4 ℃ or when daily rainfall greater than 15mm, stop to irrigate; During daily rainfall 8-15mm, by 1/2 amount of the above-mentioned water yield load vegetation-pedosphere is irrigated; Percolate makes leachate purification by the microbial metabolism effect in root system of plant and the pedosphere after irrigating, and the clearance of COD, ammonia nitrogen, total nitrogen can reach 90%, 95% and 80% respectively; Utilize evaporation, the transpiration of vegetation and soil surface simultaneously, make the percolate decrement; The length of irrigating every square metre of vegetation-pedosphere, every day is filled out age or is shortly filled out the COD of water outlet percolate after carrying out a biological disposal upon in age and the upper limit of ammonia nitrogen loading is respectively 24g and 18g.But this technology is primarily aimed at the removal of percolate pollutent, the zero release of the percolate of being unrealized; The setting of percolate evaporation region fails to strengthen the percolate evaporation effect; Need burning disposal to dispose behind a large amount of vegetation prunings.
To sum up, existing evaporation technique generally adopts burning heating or solar heating mode that percolate is carried out evaporation process, not only need specific heating installation, consume combustion energy, and because vaporization temperature height, need subsequent disposal after the evaporated vapor condensation, have cost of investment height, problem that running cost is high.Therefore present stage is badly in need of a kind of and new technology that expense low good at the percolate treatment effect.
Summary of the invention
The present invention is directed to the prior art above shortcomings, propose a kind of consumer waste landfill percolate zero discharge treatment system and treatment process, technology is simple, treatment effect good, processing costs is low; By the moisture in the evaporation percolate, pollutent partly is retained in the evaporating area vegetation and realizes that by periodic cleaning mud pollutent solidifies landfill, and then realize the zero release of percolate.
The present invention is achieved by the following technical solutions,
The present invention relates to a kind of consumer waste landfill percolate zero discharge treatment system, comprise: the leachate recirculation district of Lian Jieing, equalizing tank, percolate enhanced water evaporation district and circulatory pool successively, wherein: the leachate recirculation district is positioned at the landfill operation district at percolate stoste place, and percolate enhanced water evaporation district and circulatory pool are positioned at landfill closing district; Described connection realizes by the pipe laying mode.
Described leachate recirculation district is positioned at the covering heap body top of landfill yard, and its thickness is 0.5～1m.
The volume size of described equalizing tank is 10000m
3, this equalizing tank is rectangular parallelepiped pond shape, the length and width height is respectively 50m, 50m and 4m, its inwall is provided with the HDPE(high density polyethylene(HDPE)) and layer and be provided with Chi Gai at the top.
Described percolate enhanced water evaporation district is positioned at the top, closing zone of landfill yard, comprise: evaporation tank, cofferdam, fine sand layer, vegetation processing layer and cover framework, wherein: the degree of depth of evaporation tank is 0.6m, the cofferdam is positioned at the ground segment all around of evaporation tank and highly is 0.3m, bottom and thickness that the fine sand layer is positioned at evaporation tank are 0.5m, the vegetation processing layer is positioned at the surperficial and peripheral of cofferdam, and cover framework is fixedly set in directly over the evaporation tank.
The overall evaporation area of described evaporation tank is 3000m
2, to be formed by an evaporation tank or three continuous evaporation subpools, the area of each evaporation subpool is 1000m
2
Described fine sand layer is by particle diameter≤3mm, permeability coefficient≤10
-5The fine sand of cm/s is formed, and this fine sand layer can increase specific surface area and strengthen heat storage capacity.
Described vegetation processing layer comprises: plant Bermuda grass, Herba Setariae Viridis, reed, Festuca Arundinacea etc.
Described cover framework is through metal, and the height at support axis place is 1m, and 0.5m place in bottom is provided with vertical leg, and this cover framework integral body is domes, and its top is equipped be used to the plastics film that prevents rainwater.
Described circulatory pool is positioned at the top, closing zone of landfill yard as the buffer area of evaporation tank, when the water level in percolate enhanced water evaporation district surpasses maximum height limit, then the water with the enhanced water evaporation district is guided to circulatory pool, after treating that enhanced water evaporation district water level descends, the even pumpback of percolate in the circulatory pool is continued evaporation to the enhanced water evaporation district.
Be provided with water pump between described equalizing tank and the percolate enhanced water evaporation district;
The present invention relates to the leachate processing method of said system, realized by system constructing and system maintenance two portions, wherein:
System constructing partly comprises:
1) make up the leachate recirculation district: make up the leachate recirculation district cover the heap body in the middle of landfill yard above, the leachate recirculation areal structure is the domestic refuse layer of 0.5～1m thickness, and hydraulic load requires less than 50～100L/m
2D, setting water distribution manner is the water distribution at intermittence, every water inlet in 2 hours once, enter the percolate stoste water quality in leachate recirculation district: CODcr (chemical oxygen demand (COD)) is 30000mg/L～50000mg/L, and ammonia nitrogen is 1500～2000mg/L;
It is the biological filter of filtrate that the leachate recirculation district is in the nature with the domestic refuse after the stabilization, and it is big to have specific surface area, the advantage that superior microorganism content is high.Simultaneously, waste layer thickness is little, and based on anaerobic reaction, oxygen easily enters waste layer in the air simultaneously, forms the local oxygen condition of holding concurrently, and realizes that leachate recirculation district percolate effluent quality is COD≤10000mg/L, and ammonia nitrogen is 1000～1500mg/L.
2) make up equalizing tank: can utilize the existing equalizing tank of landfill yard self, equalizing tank be carried out seepage prevention handle, the pond body adopts HDPE geomembrane horizontal leakage preventing film, and Chi Ding adds a cover; Percolate day output according to landfill yard, set the volume of equalizing tank, thereby make percolate be not less than 50d in the equalizing tank residence time, realize to rely on further degrade organic pollutant in the percolate of amphimicrobian effect, stop by long-time (greater than 50d), anaerobion and amphimicrobe further carry out biological respinse in the equalizing tank, thereby realize the equalizing tank effluent quality: CODcr≤6000mg/L, ammonia-nitrogen content are 1000～1500mg/L.
3) make up percolate enhanced water evaporation district: make up evaporating area above landfill yard closing zone, surface load is 10～20mm/m
2D, by sorption and the organic matter degradation effect of transpiration and plant, realize enhanced water evaporation district effluent quality: CODcr is 500-800mg/L, and ammonia-nitrogen content 150～250mg/L, nitrate nitrogen content are 80～120mg/L.
4) make up circulatory pool: above landfill yard closing zone, make up circulatory pool.
Described system maintenance partly comprises: setting enhanced water evaporation district maintenance intervals is 1 year, use after 1 year, fine sand floor in the enhanced water evaporation district and the top layer mud and the vegetation processing layer that cover are thereon respectively removed thickness 0.1m, the corresponding fine sand layer of the laying 0.1m then again new plantation vegetation processing layer of laying equal stress on;
The direct landfill of having removed of vegetation processing layer, to the fine sand layer that has cleared out and cover the cement that further adds its total mass 20% in thereon the top layer mud, stripping and slicing and enter the landfill yard landfill after solidifying.
Technique effect of the present invention comprises:
1, realize the landfill percolate zero release, percolate in landfill yard, utilize spontaneous evaporation, plant transpiration, vegetation and natural degradation effect except moisture and part pollutent, be a kind of green treatment process;
2, the percolate Technology that technological operation is simple, treatment effect good, processing costs is low, 10～30 yuan/t of percolate evaporation technology processing costs percolate;
3, adopt fine sand as enhanced water evaporation district base material, can effectively increase the more long-pending than table blood of evaporation, fine sand has heat accumulation function simultaneously, the accumulation of heat on daytime can be retained to night and use for evaporation; Enhanced water evaporation district table blood plantation plant mode utilizes the plant transpiration effect can strengthen the evaporation of percolate.
Description of drawings
Fig. 1 is system architecture synoptic diagram of the present invention.
Fig. 2 is the example structure synoptic diagram.
Fig. 3 is the evaporation tank side-view.
Fig. 4 is enhanced water evaporation district vertical view.
Embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment 1
The enforcement place of present embodiment is the middle-size and small-size household refuse landfill sites in Shanghai City; landfill yard takes up an area of 13.6 hectares; storage capacity 35 ten thousand steres; landfill yard ox garbage loading embeading amount alive is 100～150t/d; it is 20～30t/d that percolate produces scape; this place average annual rainfall is that (606.1mm～1480mm), number was 2104.0 hours (1817.2 hours～2408.2 hours) to 1003.7mm when the average of the whole year door shone, and be 47% from the branch rate sunshine.Annual total solar radiation amount is 115.32 kilocalories every square centimeter (104.67 kilocalories～125.37 kilocalories).The average of the whole year wind speed is 3.8m/s, and maximum wind speed is 19m/s.
Landfill percolate stoste generation is 20-30t/d, and percolate CODcr is 35000mg/L;
As depicted in figs. 1 and 2, present embodiment comprises: the leachate recirculation district 1 of Lian Jieing, equalizing tank 2, percolate enhanced water evaporation district 3 and circulatory pool 4 successively, wherein: leachate recirculation district 1 is positioned at the landfill operation district at percolate stoste place, and percolate enhanced water evaporation district 3 and circulatory pool 4 are positioned at landfill closing district; Described connection realizes by the pipe laying mode.
Described leachate recirculation district 1 is the domestic refuse floor, specifically is positioned at the covering heap body top of landfill yard, and its thickness is 1m, and hydraulic load is 100L/m
2D, leachate recirculation district 1 area is 500m
2, water distribution manner is the water distribution at intermittence, the effect that this leachate recirculation district 1 is used for leachate recirculation district 1 realizes partial C OD degraded.
The volume size of described equalizing tank 2 is 10000m
3, the percolate hydraulic detention time is not decided to be 50 days, this equalizing tank 2 is for rectangular parallelepiped pond shape and length and width height are respectively 50m, 50m and 4m, equalizing tank 2 inwalls are provided with the HDPE(high density polyethylene(HDPE)) and layer and be provided with Chi Gai at the top; Can realize when the percolate generation is unstable, guaranteeing that by this equalizing tank 2 percolate is stable continues to enter enhanced water evaporation district 3, play regulating effect; Long-term anaerobion effect be can rely on, COD and ammonia nitrogen further removed.
As shown in Figure 3 and Figure 4, the evaporation process area in described percolate enhanced water evaporation district 3 is 3000m
2, being set at 3 rectangular areas as evaporation subpool 6, the area of each evaporation subpool 6 is 1000m
2(long * is wide=50m*20m), be 0.6m deeply; Ground segment is provided with and highly is the cofferdam 7 of 0.3m around the evaporation subpool 6, evaporation subpool 6 bottoms are equipped with the fine sand layer 8 that thickness is 0.5m, 7 surfaces, cofferdam and periphery are planted and are implanted with Herba Setariae Viridis 9 as the vegetation processing layer, and the arch support of a height 1m is built as cover framework 10 in evaporation subpool 6 tops.
As shown in Figure 3, described cover framework 10 is through metal, and the height at support axis place is 1m, and 0.5m place in bottom is provided with vertical leg, and this cover framework integral body is domes, and its top is equipped be used to the plastics film 11 that prevents rainwater.
As shown in Figure 2, in present embodiment when work,, the initial percolate degree of depth that arrange earlier in the percolate enhanced water evaporation district 3 are 20cm, by described water pump 5 regularly evenly to enhanced water evaporation district 3 intermittent water inflows.
The mode of operation of described circulatory pool 4 is: when the water level in percolate enhanced water evaporation district 3 surpasses maximum height limit, then the water with enhanced water evaporation district 3 is guided to circulatory pool 4, after treating that enhanced water evaporation district 3 water levels descend, with the 3 continuation evaporations to the enhanced water evaporation district of the even pumpback of percolate in the circulatory pool 4; When abnormal conditions take place in enhanced water evaporation district 3, continue on the low side or rainwater enters evaporating area 3 and causes the water level of evaporating area 3 too high as steam output, then by circulatory pool 4 as buffering, treat that water level returns enhanced water evaporation district 3 again when descending and carries out evaporation process.
Record rainfall amount every day during the present embodiment actually operating, the degree of depth of the enhanced water evaporation district 3 cloth water yields and enhanced water evaporation district 3 percolates is calculated the percolate steam output, and table 1 is the steam output data of 8 months percolate unit surfaces during year May in October, 2011 to 2012:
Table 12011 year enhanced water evaporation district 3 percolate unit surface steam output m in-2012
3/ m
2
| Month | 2011.10 | 2011.11 | 2011.12 | 2012.01 |
| Unit surface moon steam output (m 3/m 2Month) | 0.428 | 0.434 | 0.334 | 0.192 |
| The per day evaporation degree of depth of unit surface (mm/m 2Month) | 14.3 | 14.5 | 11.1 | 6.4 |
| Month | 2012.02 | 2012.03 | 2012.04 | 2012.05 |
| Unit surface moon steam output (m 3/m 2Month) | 0.216 | 0.295 | 0.274 | 0.507 |
| The per day evaporation degree of depth of unit surface (mm/m 2Month) | 7.2 | 9.8 | 9.1 | 16.9 |
Case study on implementation shows. according to actual percolate 20～30t generation of landfill yard, according to recharging-regulate-treatment process that evaporates, setting enhanced water evaporation district 3 is 3000m
2, adopt fine sand as base material, plantation plant in surface can effectively utilize sun power, realizes the percolate zero release.
(2011.10～2012.05) precipitation 660mm the most during the evaporation, steam output is 2680mm, 3 territories, enhanced water evaporation district evaporation hydraulic load is 11.2mm/m
2D, the clean evaporation treatment capacity of percolate is 6060t, average day output is 25.3t/d, produces data with actual percolate and coincide.
During the percolate evaporation, monitoring landfill yard plant area periphery foul smell data, repeated detection landfill yard boundary particulate matter (TSP) concentration is 0.2～0.6mg/m before the percolate evaporation
3, ammonia concentration is 0.6～1.0mg/m
3, odor concentration is 5～15; Landfill yard boundary particulate matter (TSP) concentration is 0.4～0.6mg/m during the percolate evaporation
3, ammonia concentration is 0.7～1.0mg/m
3, odor concentration is 9～16; Maintain same level before the result shows the foul smell releasing degree and evaporates, percolate evaporation technique of zero discharge does not bring the foul smell influence to surrounding enviroment.
Claims (9)
1. consumer waste landfill percolate zero discharge treatment system, it is characterized in that, comprise: the leachate recirculation district of Lian Jieing, equalizing tank, percolate enhanced water evaporation district and circulatory pool successively, wherein: the leachate recirculation district is positioned at the landfill operation district at percolate stoste place, and percolate enhanced water evaporation district and circulatory pool are positioned at landfill closing district; Described connection realizes by the pipe laying mode;
Described percolate enhanced water evaporation district is positioned at the top, closing zone of landfill yard, comprise: evaporation tank, cofferdam, fine sand layer, vegetation processing layer and cover framework, wherein: the degree of depth of evaporation tank is 0.6m, the cofferdam is positioned at the ground segment all around of evaporation tank and highly is 0.3m, bottom and thickness that the fine sand layer is positioned at evaporation tank are 0.5m, the vegetation processing layer is positioned at the surperficial and peripheral of cofferdam, and cover framework is fixedly set in directly over the evaporation tank.
2. system according to claim 1 is characterized in that, described leachate recirculation district is positioned at the covering heap body top of landfill yard, and its thickness is 0.5～1m.
3. system according to claim 1 is characterized in that, the volume size of described equalizing tank is 10000m
3, this equalizing tank is rectangular parallelepiped pond shape, and the length and width height is respectively 50m, 50m and 4m, and its inwall is provided with high-density polyethylene layer and is provided with Chi Gai at the top.
4. system according to claim 1 is characterized in that, the overall evaporation area of described evaporation tank is 3000m
2, to be formed by an evaporation tank or three continuous evaporation subpools, the area of each evaporation subpool is 1000m
2
5. system according to claim 1 is characterized in that, described fine sand layer is by particle diameter≤3mm, permeability coefficient≤10
-5The fine sand of cm/s is formed.
6. system according to claim 1 is characterized in that, described vegetation processing layer comprises: plant Bermuda grass, Herba Setariae Viridis, reed and Festuca Arundinacea.
7. system according to claim 1 is characterized in that, described cover framework is through metal, the height at support axis place is 1m, 0.5m place, bottom is provided with vertical leg, and this cover framework integral body is domes, and its top is equipped be used to the plastics film that prevents rainwater.
8. system according to claim 1, it is characterized in that, described circulatory pool is positioned at the top, closing zone of landfill yard as the buffer area of evaporation tank, when the water level in percolate enhanced water evaporation district surpasses maximum height limit, then the percolate with the enhanced water evaporation district is guided to circulatory pool, after treating that enhanced water evaporation district water level descends, the even pumpback of percolate in the circulatory pool is continued evaporation to the enhanced water evaporation district.
9. the leachate processing method according to the described system of above-mentioned arbitrary claim is characterized in that, realized by system constructing and system maintenance two portions, wherein:
Described system constructing partly comprises:
1) make up the leachate recirculation district: make up the leachate recirculation district cover the heap body in the middle of landfill yard above, the leachate recirculation areal structure is the domestic refuse layer of 0.5～1m thickness, and hydraulic load requires less than 50～100L/m
2D, setting water distribution manner is the water distribution at intermittence, and every water inlet in 2 hours once, enter the percolate stoste water quality in leachate recirculation district: CODcr is 30000mg/L～50000mg/L, and ammonia nitrogen is 1500～2000mg/L;
2) make up equalizing tank: can utilize the existing equalizing tank of landfill yard self, equalizing tank be carried out seepage prevention handle, the pond body adopts HDPE geomembrane horizontal leakage preventing film, and Chi Ding adds a cover; Percolate day output according to landfill yard, set the volume of equalizing tank, thereby make percolate be not less than 50d in the equalizing tank residence time, realize to rely on further degrade organic pollutant in the percolate of amphimicrobian effect, by the stop greater than 50d, anaerobion and amphimicrobe further carry out biological respinse in the equalizing tank, thereby realize the equalizing tank effluent quality: CODcr≤6000mg/L, ammonia-nitrogen content are 1000～1500mg/L;
3) make up percolate enhanced water evaporation district: make up evaporating area above landfill yard closing zone, surface load is 10～20mm/m
2D, by sorption and the organic matter degradation effect of transpiration and plant, realize enhanced water evaporation district effluent quality: CODcr is 500-800mg/L, and ammonia-nitrogen content 150～250mg/L, nitrate nitrogen content are 80～120mg/L;
4) make up circulatory pool: above landfill yard closing zone, make up circulatory pool;
Described system maintenance partly comprises: setting enhanced water evaporation district maintenance intervals is 1 year, use after 1 year, fine sand floor in the enhanced water evaporation district and the top layer mud and the vegetation processing layer that cover are thereon respectively removed thickness 0.1m, the corresponding fine sand layer of the laying 0.1m then again new plantation vegetation processing layer of laying equal stress on;
The direct landfill of having removed of vegetation processing layer, to the fine sand layer that has cleared out and cover the cement that further adds its total mass 20% in thereon the top layer mud, stripping and slicing and enter the landfill yard landfill after solidifying.
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| US6024513A (en) * | 1996-11-14 | 2000-02-15 | American Technologies Inc | Aerobic landfill bioreactor |
| JP2001087731A (en) * | 1999-09-24 | 2001-04-03 | Daiwa Kogyo Kk | Method for landfill treatment of waste |
| KR100468999B1 (en) * | 2004-07-29 | 2005-01-29 | 주식회사 케이벡코리아 | Leachate Non-Discharge Treatment System with Leachate Recirculation And Evapotranspiration of Vegetation in Landfill |
| CN1785850B (en) * | 2005-10-21 | 2010-05-12 | 同济大学 | Vegetative cover treatment method of long buring age buring field percolate |
| CN100509664C (en) * | 2007-04-28 | 2009-07-08 | 黄继国 | Method for treating percolation liquid of water deficiency area garbage embedding field |
| CN202865064U (en) * | 2012-09-27 | 2013-04-10 | 上海城投瀛洲生活垃圾处置有限公司 | Household garbage landfill percolate zero discharge treatment system |
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