CN1724419A - Resource process of inflitration liquid - Google Patents
Resource process of inflitration liquid Download PDFInfo
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- CN1724419A CN1724419A CNA2005100121914A CN200510012191A CN1724419A CN 1724419 A CN1724419 A CN 1724419A CN A2005100121914 A CNA2005100121914 A CN A2005100121914A CN 200510012191 A CN200510012191 A CN 200510012191A CN 1724419 A CN1724419 A CN 1724419A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/20—Fertilizers of biological origin, e.g. guano or fertilizers made from animal corpses
Abstract
A process for reclaiming the seeped liquid of garbage includes such steps as biologic treating, filtering by nano-membrane, pumping it in nano-filter system to obtain concentrated liquid and transmitted liquid, and flowing the concentrated liquid in an immersion-combustion evaporating system for concentrating and cleaning to obtain organic liquid fertilizer.
Description
Technical field
The invention belongs to the technology of garbage disposal field, particularly from percolation liquid of city life garbage landfill " biological treatment+nanofiltration technique " film trapped fluid, extract the method for resource of humic acids and simmer down to organic liquid fertilizer.
Background technology
Percolation liquid of city life garbage landfill is a kind of high concentrated organic wastewater, and the percolate treatment project of the at present domestic employing common process that has built up does not in a large number substantially all reach the first discharge standard in " consumer waste filling and embedding pollution control criterion ".Trace it to its cause it has been generally acknowledged that, biodegradability big by the variation water quality of percolate with the growth of landfill time descend, due to the ammonia-nitrogen content height, water quality characteristics such as nutritive element is unbalance, and more essential reason may be to contain in the percolate refractory organic-humic acids of high density.
Biological treatment is the base conditioning method of organic waste water, handles also use in the actual engineering the most extensive at percolate at present.On the one hand, some novel biological denitrificaion approach constantly are found and disclose in recent years, for the heavy carbonic hydrogen salt that contains high density usually and the percolate of ammonia nitrogen, it is obvious especially that these phenomenons show, lab scale, pilot scale and engineering practice that many percolates are handled all prove, as long as rationally select bio-reactor for use and optimize processing parameter, though ammonia nitrogen concentration height during to 2700mg/l, still can be up to standard by biological nitration.On the other hand, organism in the early stage percolate is owing to mainly form by being easy to biodegradable lipid acid in a large number, and it is very effective therefore adopting biological treatment.But, refractory organic---matter is planted in corruption owing to also contain in the percolate, basically begin to produce percolate from landfill yard, corruption is planted matter and is promptly existed wherein, make early stage percolate after biological treatment, still have the COD of 300～800mg/L to remove, the inaccessible direct emission request of water outlet of simple biological treatment.And continuity along with the landfill time, matter content and shared ratio increase are planted in corruption in the percolate organism, and then cause the biodegradability of percolate to descend, and cause conventional biological process to handle percolate thus and may be difficult to normal operation, so, poor effect when biological process is handled old-age group's phase percolate.Though depend merely on biological treatment water outlet is directly discharged, but the equipment of biological treatment is simple, operational management is reliable, cost is low, by rationally choosing reactor, measures such as processing parameter and improvement processing unit, high-performance bio is nitrated and purify the advantage of labile organic compound in the time of just can giving full play to biological process and handle percolate, anaerobism+anoxic+the aerobic process that successfully increases the strong filler of biofilm ability at present both at home and abroad in many engineering practices with the MBR method or in the popular response device removes ammonia nitrogen and biodegradable organic, refractory organic residual in the biological treatment water outlet then further purifies by nanofiltration or RO, and final outflow water can be stablized and reaches first discharge standard.In fact, this process combination has become one of best-of-breed technology of percolate being handled first discharge standard, but also has following subject matter: holding back concentrated solution needs further to handle, and investment and working cost are bigger etc.Handling the common method of holding back concentrated solution at present recharges, concentrates and burn, solidify, be back to biological treatment system etc., because organism is a difficult for biological degradation in the concentrated solution, recharge, be back to the biological treatment system poor effect, and may cause that system is difficult to normal operation, and concentrate cost costlinesses such as burning, curing.Therefore, be necessary to seek to handle and hold back feasible technically, the reasonable method more economically of concentrated solution.
Summary of the invention
Humic acids is an organic main component in percolate " biological treatment+nanofiltration technique " the film trapped fluid, and ratio can be up to 50～90%.From innoxious angle, it is the difficult principal pollutant up to standard of film trapped fluid that cause percolate stoste and produced after " biological treatment+nanofiltration technique ", on the other hand, it is again the main component of organic fertilizer, therefore the invention provides and separate from percolate " biological treatment+nanofiltration technique " film trapped fluid that reconcentration is the method for resource of organic liquid fertilizer behind the humic acids, while the present invention has also solved the unmanageable problem of film trapped fluid.
The invention provides the method for resource of a kind of percolation liquid of city life garbage landfill " biological treatment+nanofiltration technique " film trapped fluid, it is characterized in that this method comprises the steps:
1) with the film trapped fluid of percolate after " biological treatment+nanofiltration technique ", pump into nanofiltration system, operation pressure reduction is 0.5～1.5Mpa, cycles of concentration is 5～10 times, obtain concentrated solution behind the membrane sepn and see through liquid, the used film of described nanofiltration system is a kind of non-softening nanofiltration membrane, and holding back relative molecular weight is 200～1000;
2) allow the concentrated solution that above-mentioned steps obtains flow into the submerged combustion vapo(u)rization system, chamber temperature＞750 ℃, submergence 0.3～0.6m, cycles of concentration are 5～10 times, obtain organic liquid fertilizer after concentrating, purifying;
As percolate Ca in the water outlet after " biological treatment+nanofiltration technique " handled
2+＞150mg/L, Mg
2+During＞300mg/L, selecting the relative molecular weight of holding back of film in the described nanofiltration system for use is 500～1000.
The evaporation condensate that the film of nanofiltration system sees through liquid and submerged combustion vapo(u)rization system can be back in the equalizing tank of percolate " biological treatment+nanofiltration technique " system and handle.
Beneficial effect of the present invention: 1, in percolate " biological treatment+nanofiltration technique " the film trapped fluid contained refractory organic based on humic acids, bigger according to its molecular weight, select the nanofiltration technique of technical feasibility, economical rationality to separate concentrated earlier, be difficult to volatilization according to it again, concentrate and purify through the submerged combustion vapo(u)rization system again, obtained product-humic acid organic hquid fertnizer, so both percolate " biological treatment+nanofiltration technique " film trapped fluid is carried out recycling, solved its difficult problem that is difficult to handle again.2, can utilize this method of resource that domestic existing percolate treatment facility that can not be up to standard is transformed, it generally is rear end (biological treatment back) increase nanofiltration technique in original technology, adjust, optimize biological treatment facility and processing parameter thereof, adopt the present invention to carry out recycling to nanofiltration technique film trapped fluid again, so both can make in the percolate treatment facility water outlet after the integration organism up to standard, the film trapped fluid that this combination process is produced is turned waste into wealth, thereby reaches the unification of environmental benefit, social benefit and economic benefit.3, this method of resource can make the landfill gas of landfill yard generation obtain comprehensive utilization.4, this method of resource practicality, advanced person, flow process is simple, takes up an area of to lack, and non-secondary pollution moves easy, reliable.
Description of drawings
Fig. 1 is the method for resource schema of percolate of the present invention " biological treatment+nanofiltration technique " film trapped fluid.
Embodiment
Be further described below in conjunction with the method for resource of accompanying drawing percolate of the present invention " biological treatment+nanofiltration technique " film trapped fluid.
At first set forth general thought of the present invention.Percolate " biological treatment+nanofiltration technique " film trapped fluid is difficult to handle, and it contains the higher concentration humic acids, and therefore, the present invention is different from the angle of processing, has proposed method of resource, has taken into account the processing up to standard that produces waste water in the resource utilization process simultaneously.Percolate " biological treatment+nanofiltration technique " but the resource utilization thinking of film trapped fluid mainly be further to separate and concentrate in the film trapped fluid resource utilization material-humic acids and remove salt, purify hazardous and noxious substances simultaneously.Be embodied in: (1) has adopted the physical sepn of forming with film and evaporation technology from percolate to concentrate the method for resource that humic acids is made organic liquid fertilizer.(2) the existing membrane process that is used for handling percolate is mainly reverse osmosis and nanofiltration, in the subsequent technique of percolate after biological treatment, do not require comprehensive utilization (as greening irrigation) if handle the back water outlet, it only is qualified discharge, then nanofiltration technique is adopted in suggestion, this be because: reverse osmosis is generally all held back each solute in the percolate almost indiscriminately, so film dams that inorganic salinity also is concentrated simultaneously with organism in the liquid, thereby makes it be difficult to resource utilization; Nanofiltration is low to the monovalent ion rejection usually, divalence and above ion there be higher holding back, for the percolate after biological treatment, be mainly monovalent ion in its contained inorganic salinity, therefore can give full play to the advantage that nanofiltration can make most of salt discharge with water outlet, nanofiltration simultaneously can more easily obtain higher cycles of concentration, and the cycles of concentration of nanofiltration is 5～10 times in the percolate " biological treatment+nanofiltration technique " usually, and reverse osmosis generally can only be accomplished 3～5 times; Reverse osmosis investment and working cost are than nanofiltration height.Nanofiltration in percolate that the present invention relates to " biological treatment+nanofiltration technique " and the method for resource all should be selected special removal organism for use but not the remollescent nanofiltration membrane, the ratio of desalinization of this film should have only about 5-30%, it is a kind of high-throughput charged nanofiltration membrane, the relative molecular weight of holding back of used nanofiltration membrane is generally 200 in the percolate " biological treatment+nanofiltration technique ", and in the method for resource of the present invention the used film of nanofiltration system to hold back relative molecular weight be between 200～1000, at Ca
2+, Mg
2+When content is high, as percolate Ca in the water outlet after " biological treatment+nanofiltration technique " handled
2+＞150mg/L, Mg
2+＞300mg/L then should be nanofiltration in the method for resource and selects that to hold back relative molecular weight be film between 500～1000 for use.(3) utilize the submerged combustion vapo(u)rization system to concentrate concentrated solution after nanofiltration system is separated at last, because organic concentration reaches more than 12～20g/L in the concentrated solution at this moment, TDS more can reach more than the 35g/L, continue to adopt membrane concentration that problems such as obstruction take place easily, influence its normal operation, and working cost also can raise rapidly, therefore, further concentrates and is not suitable for adopting nanofiltration system.The submerged combustion vapo(u)rization system is a kind of vaporizer that utilizes high-temperature gas that burning produces and liquid directly to contact, its heat transfer efficiency can be up to more than 95%, owing to be direct heat transfer, eliminated the fixed contact interface, therefore overcome the problem of partition heat transfer interface fouling, can obtain higher solid content.The required combustion gas of submerged combustion vapo(u)rization system can reach the effect of " treatment of wastes with processes of wastes against one another " comprehensive utilization especially with the landfill gas of landfill yard generation, thereby reduces the cost of resource utilization greatly.Usually, percolate is in biological treatment process, most of poisonous or harmful organic substance can effectively be degraded or be escaped in the atmosphere and is removed, heavy metal concentration also can reduce in the water outlet, and remain on the lower level and (be usually less than emission standard), and in submerged combustion vapo(u)rization system process, a large amount of gas disturbance boiling liquids, can make also that poisonous or harmful micro-content organism and a spot of unsettled low molecular weight volatile organic matter are steamed fully in the concentrated solution, pathogenic agent also can be by whole deactivations, thereby have guaranteed the quality of product.(4) product of method of resource gained is a humic acid organic hquid fertnizer, and organic content is greater than 14% (weight ratio), or total content of organic carbon is greater than 8% (weight ratio).(5) film after nanofiltration system sees through the evaporation condensate of liquid and submerged combustion vapo(u)rization system, because the larger molecular organicses such as humic acids of most difficult for biological degradation are separated, therefore can be back to percolate " biological treatment+nanofiltration technique " system handles, can not influence the steady running of system.
As shown in Figure 1, the film trapped fluid that percolate produces after " biological treatment+nanofiltration technique ", separated into two parts after nanofiltration system: the concentrated solution that a part is held back for film, be rich in refractory organic based on humic acids, dense, and contained be divided into the non-volatile solvability residue (FDS) of main body with inorganic salt also can be than the charging height before the membrane sepn, but generally be not higher than 2～2.5 times, be that most of mineral ion can well pass through in nanofiltration system, rejection is not higher than 30%, and this part water yield of concentrated solution accounts for 10～20% of water into; Another part is that film sees through liquid, and the water yield accounts for 80～90% of water into, and contained organic matter molecular mass is less, and relatively easy biochemical degradation can be got back to percolate " biological treatment+nanofiltration technique " system handles.Film is retained down the concentrated solution that contains humic acids will plant the matter organic liquid fertilizer as corruption, on concentration and quality, also do not reach the relevant requirements of product, therefore, concentrated solution flows into the submerged combustion vapo(u)rization system and further concentrates, the organism quality content of final concentrated solution generally can reach 12～25%, the micro-volatile organic matter that may influence product quality is further purified in this process simultaneously, and whole inactivating pathogens, and the product of vapo(u)rization system promptly can be used as humic acid organic hquid fertnizer basically.The steam that evaporates has realized that through internal system cooling UTILIZATION OF VESIDUAL HEAT IN, save energy, phlegma get back to percolate biology processing+nanofiltration technique system handles, so this method of resource does not have secondary pollution.
Be example with Beijing's domestic refuse sanitary filling field percolate " biological treatment+nanofiltration technique " film trapped fluid below, further specify the present invention.
This sanitary filling field brought into operation in 1997, had now entered the product methane phase, 200 tons of day generation percolates, and water quality is as follows: pH is 7.67～8.48, COD
CrBe 2220～3520mg/L, BOD
5Be 230～617mg/L, TOC is 841～1590mg/L, and specific conductivity is 18.2～24.1ms/cm, and heavy metal concentration all is lower than first discharge standard, and it is yellow to sorrel that color is.This percolate main body treatment system is prior biological and handles (MBR)+nanofiltration technique, and system normally moves 1 year, and stable water outlet reaches first discharge standard.The water quality of the film trapped fluid that this percolate produces after " biological treatment+nanofiltration technique " is: pH is 5.0～6.8, COD
CrBe 10000～12500mg/L, TOC is 4000～5200mg/L.The film trapped fluid can directly be promoted by pump and enter nanofiltration system, the relative molecular weight (MWCO) of holding back of nanofiltration membrane is 200～1000, operation pressure reduction is 0.5～1.5Mpa, cycles of concentration is 5～10 times, obtain concentrated solution behind the membrane sepn, its TOC is 16000～45000mg/L, and TDS is 39000～100000mg/L, color is dark red brown, shows to contain the very humic acids of high density.It is transparent, colourless or yellow that film sees through liquid, pass back into existing percolate " biological treatment+nanofiltration technique " system, the concentrated solution that separates after concentrating through nanofiltration system of the present invention (used film is non-softening nanofiltration membrane, and holding back relative molecular weight is 200～1000) flows into existing submerged combustion vapo(u)rization system.The submerged combustion vapo(u)rization system is to utilize landfill gas to make the integral type evaporator with submerged combustion of combustion gas, comprise combustion chamber and evaporator room, inside, combustion chamber is lined with refractory materials, the bottom is immersed in the liquid of evaporator room, the sidewall on evaporator room top is provided with vapor pipe, the middle part is provided with the liquid-inlet pipe of input percolate, and the bottom is provided with the drain pipe of discharging concentrated solution, and combustion chamber and evaporator room are become one.The CH in the landfill gas that utilizes
4Content is 53～66% (volume ratios), chamber temperature＞750 ℃, submergence 0.3～0.6m, cycles of concentration are 5～10 times, TOC satisfies the content requirement of humic acid organic hquid fertnizer to organic carbon greater than 8% (weight ratio) in the final concentrated solution after the evaporation (being organic liquid fertilizer).And the steam that evaporates can be used to preheated feed liquid, thereby at internal system recycle heat, the part vapor condensation is a water, also has the uncooled steam of part with the treated water outlet spray cooling after up to standard of percolate, passes back into percolate " biological treatment+nanofiltration technique " system handles.
Percolate of the present invention " biological treatment+nanofiltration technique " film trapped fluid method of resource technical parameter:
1, the condition of water quality of percolate " biological treatment+nanofiltration technique " film trapped fluid
pH 5.0～6.8
COD
cr 300～1500mg/L
BOD
5 ＜40mg/I
TDS ＜15000mg/L
2, nanofiltration system
Operating pressure 0.5～1.5Mpa
5～10 times of cycles of concentration
3, submerged combustion vapo(u)rization system
Chamber temperature＞750 ℃
Submergence 0.3～0.6m
5～10 times of cycles of concentration.
Claims (3)
1. the method for resource of percolation liquid of city life garbage landfill " biological treatment+nanofiltration technique " film trapped fluid is characterized in that this method comprises the steps:
1) with the film trapped fluid of percolate after " biological treatment+nanofiltration technique ", pump into nanofiltration system, operation pressure reduction is 0.5～1.5Mpa, cycles of concentration is 5～10 times, obtain concentrated solution behind the membrane sepn and see through liquid, the used film of described nanofiltration system is a kind of non-softening nanofiltration membrane, and holding back relative molecular weight is 200～1000;
2) allow the concentrated solution that above-mentioned steps obtains flow into the submerged combustion vapo(u)rization system, chamber temperature＞750 ℃, submergence 0.3～0.6m, cycles of concentration are 5～10 times, obtain organic liquid fertilizer after concentrating, purifying.
2. method of resource according to claim 1 is characterized in that: percolate Ca in the water outlet after " biological treatment+nanofiltration technique " handled
2+＞150mg/L, Mg
2+During＞300mg/L, selecting the relative molecular weight of holding back of film in the described nanofiltration system for use is 500～1000.
3. method of resource according to claim 1 is characterized in that: the evaporation condensate that the film of described nanofiltration system is seen through liquid and described submerged combustion vapo(u)rization system is back in the equalizing tank of percolate " biological treatment+nanofiltration technique " system and handles.
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|---|---|---|---|
| CNB2005100121914A CN1298640C (en) | 2005-07-15 | 2005-07-15 | Resource process of inflitration liquid |
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|---|---|---|---|
| CNB2005100121914A CN1298640C (en) | 2005-07-15 | 2005-07-15 | Resource process of inflitration liquid |
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| Publication Number | Publication Date |
|---|---|
| CN1724419A true CN1724419A (en) | 2006-01-25 |
| CN1298640C CN1298640C (en) | 2007-02-07 |
Family
ID=35924073
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100404444C (en) * | 2006-09-01 | 2008-07-23 | 清华大学 | Method for decreasing sewage sludge from town and changing it to resources |
| CN100448917C (en) * | 2006-09-27 | 2009-01-07 | 清华大学 | Method of extracting humic acids from rubbish percolation liquid membrane process concentrated liquid |
| CN102443178A (en) * | 2011-09-15 | 2012-05-09 | 福州大学 | Extraction method of humic acid |
| CN102951741A (en) * | 2012-08-14 | 2013-03-06 | 上海晶宇环境工程有限公司 | Landfill leachate deep processing technology and special equipment |
| CN101701025B (en) * | 2009-10-30 | 2013-03-20 | 华南理工大学 | Method for extracting humus acid from concentrated waste percolate and treating waste water |
| CN103626314A (en) * | 2013-11-06 | 2014-03-12 | 上海晶宇环境工程有限公司 | Technology for treating nanofiltration concentrated solution of garbage leachate and special device |
| CN103627008A (en) * | 2013-11-06 | 2014-03-12 | 上海晶宇环境工程有限公司 | Technology and special device for extracting humic acids from landfill leachate |
| CN104310659A (en) * | 2014-11-12 | 2015-01-28 | 福州大学 | Separating reclaiming technology for humic acid in garbage leachate MBR+NF concentrated liquid containing high concentration of SO42 |
| CN105585196A (en) * | 2016-01-26 | 2016-05-18 | 安徽普朗膜技术有限公司 | Treatment system for household refuse leachate |
| CN111072433A (en) * | 2020-01-22 | 2020-04-28 | 福州大学 | Method for purifying sodium chloride in humic acid liquid fertilizer |
| CN112607935A (en) * | 2020-11-24 | 2021-04-06 | 南京万德斯环保科技股份有限公司 | Full-quantitative treatment method for leachate of refuse landfill |
| CN112777849A (en) * | 2020-12-15 | 2021-05-11 | 南京万德斯环保科技股份有限公司 | Comprehensive treatment system and method for landfill leachate |
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| US5695643A (en) * | 1993-04-30 | 1997-12-09 | Aquatech Services, Inc. | Process for brine disposal |
| JP2887105B2 (en) * | 1996-04-24 | 1999-04-26 | 幸子 林 | Method and apparatus for producing drinking water and salt |
| FR2777271B1 (en) * | 1998-04-10 | 2000-06-30 | Della Toffola France Sa | BIOPHYSICAL METHODS AND DEVICES FOR THE TREATMENT OF SUGAR OR ALCOHOLIC WASTEWATER |
| CN1209304C (en) * | 2003-07-14 | 2005-07-06 | 宜兴鹏鹞阳光环保有限公司 | Garbage percolation liquid treatment process |
| CN1199867C (en) * | 2003-08-22 | 2005-05-04 | 清华大学 | Two-stage immersion combustion evaporation process for treating percolate from filling field |
| CN1243670C (en) * | 2003-09-25 | 2006-03-01 | 江南大学 | Techniquie for treating refuse percolate for electrochemical-anaerobi-aerobic membrane bioreactor assembling system |
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| CN100404444C (en) * | 2006-09-01 | 2008-07-23 | 清华大学 | Method for decreasing sewage sludge from town and changing it to resources |
| CN100448917C (en) * | 2006-09-27 | 2009-01-07 | 清华大学 | Method of extracting humic acids from rubbish percolation liquid membrane process concentrated liquid |
| CN101701025B (en) * | 2009-10-30 | 2013-03-20 | 华南理工大学 | Method for extracting humus acid from concentrated waste percolate and treating waste water |
| CN102443178B (en) * | 2011-09-15 | 2013-12-11 | 福州大学 | Extraction method of humic acid |
| CN102443178A (en) * | 2011-09-15 | 2012-05-09 | 福州大学 | Extraction method of humic acid |
| CN102951741B (en) * | 2012-08-14 | 2014-09-24 | 上海晶宇环境工程有限公司 | Landfill leachate deep processing technology and special equipment |
| CN102951741A (en) * | 2012-08-14 | 2013-03-06 | 上海晶宇环境工程有限公司 | Landfill leachate deep processing technology and special equipment |
| CN103626314A (en) * | 2013-11-06 | 2014-03-12 | 上海晶宇环境工程有限公司 | Technology for treating nanofiltration concentrated solution of garbage leachate and special device |
| CN103627008A (en) * | 2013-11-06 | 2014-03-12 | 上海晶宇环境工程有限公司 | Technology and special device for extracting humic acids from landfill leachate |
| CN103626314B (en) * | 2013-11-06 | 2016-04-13 | 上海晶宇环境工程有限公司 | The nanofiltration concentrated solution treatment process of percolate and special purpose device |
| CN104310659A (en) * | 2014-11-12 | 2015-01-28 | 福州大学 | Separating reclaiming technology for humic acid in garbage leachate MBR+NF concentrated liquid containing high concentration of SO42 |
| CN104310659B (en) * | 2014-11-12 | 2016-06-01 | 福州大学 | Containing high density SO42-Percolate MBR+NF concentrated solution in humic acids process for separating and recovering |
| CN105585196A (en) * | 2016-01-26 | 2016-05-18 | 安徽普朗膜技术有限公司 | Treatment system for household refuse leachate |
| CN111072433A (en) * | 2020-01-22 | 2020-04-28 | 福州大学 | Method for purifying sodium chloride in humic acid liquid fertilizer |
| CN112607935A (en) * | 2020-11-24 | 2021-04-06 | 南京万德斯环保科技股份有限公司 | Full-quantitative treatment method for leachate of refuse landfill |
| CN112777849A (en) * | 2020-12-15 | 2021-05-11 | 南京万德斯环保科技股份有限公司 | Comprehensive treatment system and method for landfill leachate |
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