CN111592199A - Low-temperature spraying landfill leachate concentrated solution zero-discharge system - Google Patents
Low-temperature spraying landfill leachate concentrated solution zero-discharge system Download PDFInfo
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- CN111592199A CN111592199A CN202010571392.2A CN202010571392A CN111592199A CN 111592199 A CN111592199 A CN 111592199A CN 202010571392 A CN202010571392 A CN 202010571392A CN 111592199 A CN111592199 A CN 111592199A
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- evaporation tower
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/04—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste liquors, e.g. sulfite liquors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
- F23L15/045—Arrangements of recuperators using intermediate heat-transfer fluids
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic 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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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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
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
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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
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The utility model provides a low temperature sprays rubbish leachate concentrate zero release system, including waste heat recovery and water separator, air heater, the boiler, the evaporation tower, high temperature saturation humid air pipeline, the shower, the defroster, the circulating pump, the heater that is equipped with high temperature heat medium entry and low temperature heat medium export, rubbish storehouse, the forced draught blower, evaporation tower air-inlet line, booster fan, the equalizing basin, biochemical treatment device, both be connected with biochemical treatment device through the pipeline and the membrane permeation treatment device that is connected with waste heat recovery and water separator bottom through the condensate water pipeline, the well water pipeline that is connected and carries well water to get into well water tank with membrane permeation treatment device bottom, rubbish leachate concentrate input pipeline. The invention takes a low-quality heat source as evaporation concentration power, the waste gas full heat recovery heats the boiler for air supply, the energy is saved, the condensed water is recovered, the system is closed and has no peculiar smell, and the zero discharge of the leachate concentrated solution is realized. Can be widely used for treating the landfill leachate concentrated solution of the refuse power plant.
Description
Technical Field
The invention relates to a low-temperature spraying landfill leachate concentrated solution zero-discharge system which can be widely applied to landfill leachate concentrated solution treatment in a refuse power plant.
Background
Landfill leachate contains a plurality of pollutants and has great harmfulness. At present, landfill leachate is mainly treated by biochemical and membrane permeation processes, but leachate concentrated solution generated after treatment has higher ecological hazard because of high pollutant concentration and low biodegradability. The concentrated solution treatment method mainly comprises three treatment modes of recharging, harmless treatment and concentration. Recharge can cause the enrichment of pollutants and possible contamination of groundwater; the harmless treatment comprises physical methods mainly including coagulation, electric flocculation and adsorption, and chemical methods mainly including advanced oxidation. The removal of pollutants by coagulation, electric flocculation and adsorption is not thorough, the running stability of the advanced oxidation method is poor, and new salt is introduced; commonly used concentration techniques include membrane techniques, as well as evaporation techniques based on submerged combustion evaporation, heat pump evaporation, multiple-effect flash evaporation, and multiple-effect forced circulation evaporation. High-concentration organic matters in the concentrated solution can cause membrane pollution, high hardness can cause scaling, the evaporation technology has large demand on energy sources of methane or steam sources, and the multi-effect evaporation and heat pump technology have the problems of large investment and expensive maintenance.
Disclosure of Invention
The invention aims to provide a low-temperature spraying landfill leachate concentrated solution zero-emission system which takes a low-quality heat source as evaporation concentration power, supplies air to a boiler by recycling waste gas and total heat, saves energy, recycles condensed water, is closed and has no peculiar smell, and realizes zero emission of landfill leachate concentrated solution.
In order to achieve the aim, the low-temperature spraying garbage leachate concentrated solution zero-discharge system comprises a waste heat recovery and water separation device, an air preheater connected with the waste heat recovery and water separation device through an air pipeline, a boiler connected with the air preheater through an air pipeline, an evaporation tower, a high-temperature saturated wet air pipeline, a sprayer, a circulating pump and a circulating pump, wherein the bottom of the evaporation tower is connected with the boiler through a garbage leachate concentrated solution output pipeline, the evaporation tower is internally filled with garbage leachate concentrated solution, the high-temperature saturated wet air pipeline is connected between the upper part of the waste heat recovery and water separation device and the upper part of the evaporation tower, the sprayer is positioned above the horizontal plane of the garbage leachate concentrated solution of the evaporation tower, is arranged in the evaporation tower and is used for atomizing the garbage leachate concentrated solution, the circulating pump is positioned above the sprayer and arranged in the evaporation tower and is used for removing the garbage leachate concentrated solution carried in the air, and the, a heater connected with the circulating pump through one end of the pipeline, the other end of the heater is connected with the sprayer and is provided with a high-temperature heat medium inlet and a low-temperature heat medium outlet, a garbage storage bin connected with the waste heat recovery and water separation device through an air inlet pipeline of the waste heat recovery and water separation device, a blower arranged on the air inlet pipeline of the waste heat recovery and water separation device, a low-temperature saturated wet air pipeline connected with the garbage storage bin on the side surface of the bottom of the waste heat recovery and water separation device, an air inlet pipeline of an evaporation tower arranged between the garbage storage bin and the evaporation tower, a booster fan arranged on the air inlet pipeline of the evaporation tower, a regulating tank connected with a raw garbage percolate pipeline at the bottom of the garbage storage bin for regulating the water quality and water quantity of garbage percolate, a biochemical treatment device connected with the regulating tank through a pipeline for biological and chemical treatment, and a membrane permeation part connected with the biochemical treatment device through a The waste leachate concentrated solution input pipeline is connected between the membrane permeation treatment device and the bottom side surface of the evaporation tower.
According to the low-temperature spraying landfill leachate concentrated solution zero-discharge system, the heater is a dividing wall type heat exchanger, and can heat landfill leachate concentrated solution by using heat of a high-temperature heating medium.
According to the low-temperature spraying garbage leachate concentrated solution zero-discharge system, the high-temperature heating medium is steam, hot water or high-temperature flue gas.
According to the low-temperature spraying garbage leachate concentrated solution zero-discharge system, the waste heat recovery and water separation device is a dividing wall type heat exchanger, saturated humid air flowing at the hot side can be used for heating cold air flowing at the cold side, condensed water is separated out, and the condensed water enters the membrane permeation treatment device through a pipeline.
The invention relates to a low-temperature spraying garbage leachate concentrated solution zero-discharge system.A membrane permeation treatment device adopts membrane permeation treatment methods such as ultrafiltration, nanofiltration, reverse osmosis and the like to perform membrane permeation treatment.
The invention relates to a low-temperature spraying landfill leachate concentrated solution zero-discharge system, which has the following circulating air flow principle: the low-temperature air in the garbage storage bin enters the evaporation tower under the pressurization of the booster fan, directly contacts with the high-temperature garbage leachate concentrated solution atomized by the sprayer, the temperature and the humidity of the air are increased, the carried concentrated solution is removed by the demister, the air leaves the evaporation tower and then enters the waste heat recovery and water separation device in the form of high-temperature saturated humid air, and the air enters the garbage storage bin again after the temperature of the air is reduced to become low-temperature saturated humid air, and condensed water is separated out at the same time. The low-temperature air sent by the air blower from the garbage storage bin absorbs heat in the waste heat recovery and water separation device, the temperature rises, and the low-temperature air enters the air preheater and then enters the boiler after being heated.
The invention relates to a low-temperature spraying landfill leachate concentrated solution zero-discharge system, which has the following flow principle of landfill leachate: firstly, the landfill leachate in the landfill storage bin enters an adjusting tank to adjust the water quality and the water quantity. Then, the wastewater enters a biochemical treatment device, after most of organic pollutants are removed, the wastewater is mixed with condensed water separated out by a waste heat recovery and water separation device, and the mixture enters a membrane permeation treatment device for treatment. Finally, the reclaimed water treated by the membrane permeation treatment device enters a reclaimed water tank, the remaining garbage leachate concentrated solution enters an evaporation tower, enters a heater for heating after being pressurized by a circulating pump, then enters a sprayer, is atomized by the sprayer and then contacts with low-temperature air to generate mass transfer and heat transfer, part of water with reduced temperature is vaporized and enters air, the concentration is increased and falls to the bottom of an absorption tower, and the concentrated garbage leachate concentrated solution enters a boiler for incineration treatment.
The low-temperature spraying garbage leachate concentrated solution zero-emission system disclosed by the invention has the advantages that the air of a garbage storage bin is used as a carrier, a low-quality heat source is used as evaporation concentration power, primary and secondary air at the outlet of an air feeder is used as a cooling heat recovery medium, the waste gas total heat is recycled, the energy is saved, condensed water is recovered, the system is closed and has no peculiar smell, the concentrated garbage leachate concentrated solution is subjected to boiler incineration treatment, and the aim of zero emission of the garbage leachate concentrated solution is fulfilled.
The low-temperature spraying garbage leachate concentrated solution zero-emission system takes a low-quality heat source as evaporation concentration power, takes garbage storage bin air as a carrier, separates garbage leachate concentrated solution from water, takes secondary air at an outlet of a blower as a cooling heat recovery medium, recycles full heat of waste gas, and separates condensed water from air; the air used as the concentrated solution of the evaporated and concentrated garbage leachate comes from a garbage storage bin, the air after heat recovery and water separation still returns to the garbage storage bin without exhausting air, the garbage leachate comes from the garbage storage bin, the treated garbage leachate enters a middle water tank, the concentrated solution of the concentrated garbage leachate which cannot be treated enters a boiler for incineration treatment, the system is closed and has no peculiar smell, and the purpose of zero emission of the concentrated solution of the garbage leachate is realized.
In conclusion, the low-temperature spraying garbage leachate concentrated solution zero-emission system takes a low-quality heat source as evaporation concentration power, the waste gas full-heat recovery heats the boiler for air supply, energy is saved, condensed water is recovered, the system is closed and has no peculiar smell, and the garbage leachate concentrated solution zero-emission is realized.
Drawings
The invention will be further described with reference to the accompanying drawings and examples thereof.
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
In fig. 1, the low-temperature spraying landfill leachate concentrate zero-emission system comprises a waste heat recovery and water separation device 1, an air preheater 2 connected with the waste heat recovery and water separation device through an air pipeline, a boiler 3 connected with the air preheater through an air pipeline, an evaporation tower 4 connected with the boiler at the bottom through a landfill leachate concentrate output pipeline and filled with landfill leachate concentrate inside, a high-temperature saturated wet air pipeline 5 connected between the upper part of the waste heat recovery and water separation device and the upper part of the evaporation tower, a sprayer 6 positioned above the level of the landfill leachate concentrate of the evaporation tower and installed in the evaporation tower and used for atomizing the landfill leachate concentrate, a demister 7 positioned above the sprayer and installed in the evaporation tower and used for removing the landfill leachate carried in the air, and a circulating system connected with the bottom side of the evaporation tower through a pipeline and capable of performing frequency conversion control and adjustment on the flow rate of the landfill leachate concentrate A pump 8, a heater 9 connected with the circulating pump through one end of the pipeline, the other end connected with the sprayer and provided with a high-temperature heat medium inlet a and a low-temperature heat medium outlet b, a garbage storage bin 10 connected with the waste heat recovery and water separation device through an air inlet pipeline of the waste heat recovery and water separation device, a blower 11 arranged on the air inlet pipeline of the waste heat recovery and water separation device, a low-temperature saturated wet air pipeline 12 connected with the garbage storage bin on the side surface of the bottom of the waste heat recovery and water separation device, an air inlet pipeline 13 of an evaporation tower arranged between the garbage storage bin and the evaporation tower, a booster fan 14 arranged on the air inlet pipeline of the evaporation tower, a regulating tank 15 connected with the bottom of the garbage storage bin through a raw leachate raw liquid pipeline 20 and used for regulating the water quality and the water quantity of garbage leachate, and a biochemical treatment device 16 connected with, a membrane permeation treatment device 17 which is connected with the biochemical treatment device through a pipeline and is connected with the bottom of the waste heat recovery and water separation device through a condensed water pipeline 21, a reclaimed water pipeline 18 which is connected with the bottom of the membrane permeation treatment device and conveys reclaimed water into a reclaimed water tank 22, and a garbage percolate concentrated solution input pipeline 19 which is connected between the membrane permeation treatment device and the bottom side surface of the evaporation tower.
According to the low-temperature spraying landfill leachate concentrated solution zero-discharge system, the heater is a dividing wall type heat exchanger, and can heat landfill leachate concentrated solution by using heat of a high-temperature heating medium.
According to the low-temperature spraying garbage leachate concentrated solution zero-discharge system, the high-temperature heating medium is steam, hot water or high-temperature flue gas.
According to the low-temperature spraying garbage leachate concentrated solution zero-discharge system, the waste heat recovery and water separation device is a dividing wall type heat exchanger, saturated humid air flowing at the hot side can be used for heating cold air flowing at the cold side, condensed water is separated out, and the condensed water enters the membrane permeation treatment device through a pipeline.
In view of the foregoing, while the preferred embodiments of the present invention have been described, it is to be understood that the invention is not limited to the precise embodiments described above, and that equipment and structures not described in detail are understood to be practiced in a manner that is conventional in the art; any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention by those skilled in the art can be made without departing from the technical scope of the present invention, and still fall within the protection scope of the technical solution of the present invention.
Claims (4)
1. A low-temperature spraying garbage leachate concentrated solution zero-emission system is characterized by comprising a waste heat recovery and water separation device, an air preheater connected with the waste heat recovery and water separation device through an air pipeline, a boiler connected with the air preheater through an air pipeline, an evaporation tower, a high-temperature saturated wet air pipeline, a sprayer, a circulating pump and a circulating pump, wherein the bottom of the evaporation tower is connected with the boiler through a garbage leachate concentrated solution output pipeline, the evaporation tower is internally filled with garbage leachate concentrated solution, the high-temperature saturated wet air pipeline is connected between the upper part of the waste heat recovery and water separation device and the upper part of the evaporation tower, the sprayer is positioned above the horizontal plane of the garbage leachate concentrated solution of the evaporation tower, is arranged in the evaporation tower and is used for atomizing the garbage leachate concentrated solution, the demister is positioned above the sprayer and is arranged in the evaporation tower and is used for removing the garbage leachate concentrated solution carried in the air, the circulating pump is connected, a heater connected with the circulating pump through one end of the pipeline, the other end of the heater is connected with the sprayer and is provided with a high-temperature heat medium inlet and a low-temperature heat medium outlet, a garbage storage bin connected with the waste heat recovery and water separation device through an air inlet pipeline of the waste heat recovery and water separation device, a blower arranged on the air inlet pipeline of the waste heat recovery and water separation device, a low-temperature saturated wet air pipeline connected with the garbage storage bin on the side surface of the bottom of the waste heat recovery and water separation device, an air inlet pipeline of an evaporation tower arranged between the garbage storage bin and the evaporation tower, a booster fan arranged on the air inlet pipeline of the evaporation tower, a regulating tank connected with a raw garbage percolate pipeline at the bottom of the garbage storage bin for regulating the water quality and water quantity of garbage percolate, a biochemical treatment device connected with the regulating tank through a pipeline for biological and chemical treatment, and a membrane permeation part connected with the biochemical treatment device through a The waste leachate concentrated solution input pipeline is connected between the membrane permeation treatment device and the bottom side surface of the evaporation tower.
2. The system of claim 1, wherein the heater is a dividing wall heat exchanger capable of heating the landfill leachate concentrate with heat of a high temperature heating medium.
3. The system for zero emission of concentrated solution of low-temperature spray landfill leachate according to claim 1, wherein the high-temperature heating medium is steam, hot water or high-temperature flue gas.
4. The system of claim 1, wherein the waste heat recovery and water separation device is a dividing wall type heat exchanger, and is capable of heating cold air flowing at a cold side by saturated humid air flowing at a hot side, and separating out condensed water, and the condensed water enters the membrane permeation treatment device through a pipeline.
Priority Applications (1)
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CN202010571392.2A CN111592199A (en) | 2020-06-22 | 2020-06-22 | Low-temperature spraying landfill leachate concentrated solution zero-discharge system |
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CN202010571392.2A CN111592199A (en) | 2020-06-22 | 2020-06-22 | Low-temperature spraying landfill leachate concentrated solution zero-discharge system |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112520806A (en) * | 2020-12-04 | 2021-03-19 | 重庆市生态环境科学研究院 | Membrane concentration landfill leachate minimizing device |
CN112661215A (en) * | 2020-11-24 | 2021-04-16 | 南京万德斯环保科技股份有限公司 | Treatment process and system for landfill leachate membrane concentrated solution |
-
2020
- 2020-06-22 CN CN202010571392.2A patent/CN111592199A/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112661215A (en) * | 2020-11-24 | 2021-04-16 | 南京万德斯环保科技股份有限公司 | Treatment process and system for landfill leachate membrane concentrated solution |
CN112520806A (en) * | 2020-12-04 | 2021-03-19 | 重庆市生态环境科学研究院 | Membrane concentration landfill leachate minimizing device |
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Application publication date: 20200828 |