CN114853239A - Method for performing full-scale treatment on landfill leachate by utilizing electro-adsorption molecular distillation - Google Patents
Method for performing full-scale treatment on landfill leachate by utilizing electro-adsorption molecular distillation Download PDFInfo
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- CN114853239A CN114853239A CN202210167382.1A CN202210167382A CN114853239A CN 114853239 A CN114853239 A CN 114853239A CN 202210167382 A CN202210167382 A CN 202210167382A CN 114853239 A CN114853239 A CN 114853239A
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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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- 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
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
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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
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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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Abstract
The scheme discloses a method for performing full treatment on landfill leachate by utilizing electro-adsorption molecular distillation, which belongs to the technical field of wastewater treatment, wherein the full treatment on the landfill leachate is performed by utilizing an electro-adsorption molecular distillation reactor, namely a raw water regulating tank, a high-efficiency electro-adsorption reactor and a high-efficiency molecular distillation reactor which are combined, so that the standard discharge of the leachate is realized; as shown in fig. 1, the apparatus includes: a raw water regulating reservoir (1), a high-efficiency electro-adsorption reactor (2) and a high-efficiency molecular distillation reactor (3). The process method can realize the full treatment of the landfill leachate, realize no discharge of pollutants into the environment, protect the ecological environment and solve the key problem for the full treatment of the landfill leachate.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a method for performing full-scale treatment on landfill leachate by utilizing electro-adsorption molecular distillation.
Background
The landfill leachate is high-concentration organic wastewater which is difficult to treat and is characterized by large water quality and water quantity fluctuation, complex components and high content of toxic and harmful substances. The treatment of landfill leachate has become a major topic for environmental pollution control in China at present and in a considerable period of time in the future (Shenhuan, Jinjuting, Daizhiqing, etc.. the experimental research on the treatment of urban landfill leachate by an upflow anaerobic sludge blanket [ J ]. the environmental pollution treatment technology and equipment, 2004, 5 (4): 1-5). The ammonia nitrogen content of the landfill leachate is high, and the landfill leachate is more difficult to treat. At present, the research of new leachate denitrification technology becomes a hot research topic of great concern for environmental scientists at home and abroad (Zhang Ping, Liu Qiang. domestic garbage sanitary landfill garbage leachate denitrification treatment technology, 2007,15(1): 6-9).
At present, the treatment technology of landfill leachate can be divided into two categories: biological methods and physicochemical methods. From many research examples, the leachate is difficult to be treated by a process mainly based on a neutralization stripping-biochemical method until the leachate meets relevant discharge standards, the degradation capability of microorganisms on refractory organic matters contained in the leachate is low, and if ammonia stripped by blowing is not recovered, secondary pollution is caused. The physical and chemical methods mainly comprise reverse osmosis, nanofiltration, ultrafiltration, ultrasonic wave, photocatalysis, chemical oxidation, activated carbon adsorption, coagulating sedimentation and the like. (Populus pollen, Populus cis-grown, Caochong Mei, etc. reverse osmosis and its application in the treatment of municipal landfill leachate, 2007,33(3): 6-12).
The electro-adsorption technology is a novel water treatment technology (Chen Membrin, et al. research on working process of electro-adsorption equipment [ J ]. environmental engineering report, 2009, 3 (7): 11-14) which utilizes the phenomenon that ions and charged particles in water are adsorbed on the surface of a charged electrode to concentrate and concentrate dissolved salts and other charged substances in water on the surface of the electrode to realize water purification/desalination.
Molecular distillation, also known as short path distillation, is a continuous distillation process carried out under high vacuum. The molecular distillation process differs from the conventional distillation process in that separation is carried out at boiling temperature, the evaporation and condensation process is reversible, and an equilibrium state is formed between the liquid phase and the vapor phase. The molecular distillation process is an irreversible and distillation process which is carried out at a temperature far from the atmospheric boiling point of the substance, more precisely, it is a process of molecular evaporation. The operation temperature is far lower than the boiling point temperature of the material under normal pressure, and the material is heated for a very short time without damaging the material, so the molecular distillation is widely applied to the industries of chemical industry, medicine, light industry, petroleum, grease, nuclear chemical industry and the like for concentrating or purifying high molecular weight, high boiling point and high viscosity materials and organic compounds with poor thermal stability (Wangwei, et al.
Disclosure of Invention
The invention aims to provide a method for carrying out full treatment on landfill leachate by utilizing electro-adsorption molecular distillation, namely a method for realizing the full treatment on the landfill leachate by combining a high-efficiency electro-adsorption reactor and a high-efficiency molecular distillation reactor.
The main processing equipment related by the invention is as follows: a raw water regulating reservoir, a high-efficiency electro-adsorption reactor and a high-efficiency molecular distillation reactor.
The invention comprises the following steps:
1) the high-salinity wastewater is subjected to turbidity removal, the pH value is adjusted to be 4-5, and then the high-salinity wastewater enters a raw water adjusting tank to stabilize the water quantity and the water quality;
2) leading the effluent of the raw water regulating reservoir to pass through a high-efficiency electro-adsorption reactor;
3) feeding the concentrated solution of the high-efficiency electro-adsorption reactor into a high-efficiency molecular distillation reactor;
4) the effluent of the high-efficiency electro-adsorption reactor is discharged after reaching the standard;
5) the effluent of the high-efficiency molecular distillation reactor is discharged after reaching the standard;
6) the solid crystallization residue in the high-efficiency molecular distillation reactor is periodically scraped.
The tank body of the raw water adjusting tank is preferably made of PE anticorrosive materials, and a pH adjusting agent adding device is preset at a water inlet of the tank body and is used for adjusting the water quantity and the pH value of water.
The electric adsorption reactor adopts electric adsorption reactor complete equipment (model number is DLT-DX, positive and negative electrodes are carbon electrode materials, working voltage is 1.5V, and a manufacturer is Lishuili Germany force water service equipment manufacturing company).
The high-efficiency molecular distillation reactor equipment preferably adopts a built-in condenser type (the model is SPD-100, the heating area is 1M2, the main material is industrial ceramic, the equipment height is 3.25M, the equipment inner diameter is 350mm, and the manufacturer is tin-free Hengyi chemical machinery Co., Ltd.).
Compared with the traditional treatment method adopting the process of adding chemical agents, the method has the following remarkable advantages and effects:
1. the process method is carried out under the conditions of normal temperature and normal pressure, does not need to add chemical agents, only consumes a small amount of electric energy, has no secondary pollution, and greatly reduces the treatment cost.
2. The process method operates at normal temperature and normal pressure, the main equipment is made of conventional materials such as PE and the like, and anticorrosive materials such as nickel-based alloy or titanium alloy and the like are not needed, so that the investment cost is greatly reduced, and the process method has obvious economic benefit.
3. Short time for treating wastewater, high efficiency, less investment of treatment equipment and small occupied area.
4. The process method can realize the full treatment of the landfill leachate, realize no discharge of pollutants into the environment, protect the ecological environment and solve the key problem for the full treatment of the landfill leachate.
Drawings
FIG. 1 is a schematic flow chart of a treatment process according to an embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
the main processing equipment related by the invention is as follows: a raw water adjusting tank 1, a high-efficiency electro-adsorption reactor 2 and a high-efficiency molecular distillation reactor 3. The above-mentioned treatment equipment can be purchased according to the relevant requirements, wherein: the tank body of the raw water adjusting tank is preferably made of PE anticorrosive materials, and a pH adjusting agent adding device is preset at a water inlet of the tank body and is used for adjusting the water quantity and the pH value of water.
The electric adsorption reactor adopts electric adsorption reactor complete equipment (model number is DLT-DX, positive and negative electrodes are carbon electrode materials, working voltage is 1.5V, and a manufacturer is Lishuili Germany force water service equipment manufacturing company).
The high-efficiency molecular distillation reactor equipment preferably adopts a built-in condenser type (the model is SPD-100, the heating area is 1M2, the main material is industrial ceramic, the equipment height is 3.25M, the equipment inner diameter is 350mm, and the manufacturer is tin-free Hengyi chemical machinery Co., Ltd.).
The invention comprises the following steps (see fig. 1):
1) the high-salinity wastewater is subjected to turbidity removal, the pH value is adjusted to be 4-5, and then the high-salinity wastewater enters a raw water adjusting tank to stabilize the water quantity and the water quality;
2) leading the effluent of the raw water regulating reservoir to pass through a high-efficiency electro-adsorption reactor;
3) feeding the concentrated solution of the high-efficiency electro-adsorption reactor into a high-efficiency molecular distillation reactor;
4) the effluent of the high-efficiency electro-adsorption reactor is discharged after reaching the standard;
5) the effluent of the high-efficiency molecular distillation reactor is discharged after reaching the standard;
6) the solid crystallization residue in the high-efficiency molecular distillation reactor is periodically scraped.
Example 1
The method comprises the following steps of performing full-quantitative garbage percolation treatment on a domestic garbage landfill by using an electric adsorption molecular distiller, wherein the water quality is as follows: pH value of 8, COD Cr 6705mg/L, ammonia nitrogen 3920mg/L, chloride 5900mg/L, BOD 5 1960.0mg/L and TDS 26700 mg/L. The experimental results are as follows: after 24 hours of operation, the full-quantization treatment rate of the wastewater is 99.9%, the average CODcr removal rate is 99.9%, the average ammonia nitrogen removal rate is 99.9%, the average TDS removal rate is 99.9%, and the equipment operation is stable.
Example 2
Carrying out full-quantization treatment on garbage percolation in a garbage incineration power plant by using an electro-adsorption molecular distillation reactor, wherein the water quality is as follows: pH value of 9, COD Cr 4490mg/L, 2980mg/L ammonia nitrogen, 6180mg/L chloride, BOD 5 3218.0mg/L and TDS 7102 mg/L. The experimental results are as follows: after 24 hours of operation, the full-quantization treatment rate of the wastewater is 99.9%, the average CODcr removal rate is 99.8%, the average ammonia nitrogen removal rate is 99.8%, the average TDS removal rate is 99.9%, and the equipment operation is stable.
Example 3
Carrying out full-quantitative percolation treatment on the hazardous waste landfill garbage by using an electro-adsorption molecular distillation reactor, wherein the water quality is as follows: pH value of 9.3, COD Cr Is 37183mg/L, ammonia nitrogen 6607mg/L, chloride 33209mg/L, BOD 5 907.0mg/L, TDS 66301 mg/L. The experimental results are as follows: after 24 hours of operation, the full-quantization treatment rate of the wastewater is 99.9%, the average CODcr removal rate is 99.9%, the average ammonia nitrogen removal rate is 99.8%, the average TDS removal rate is 99.8%, and the equipment operation is stable.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (6)
1. A method for carrying out full treatment on landfill leachate by utilizing electro-adsorption molecular distillation is characterized in that the full treatment is carried out on the landfill leachate by utilizing an electro-adsorption molecular distillation reactor, namely a raw water regulating tank, a high-efficiency electro-adsorption reactor and a high-efficiency molecular distillation reactor which are combined, so that the standard discharge of the leachate is realized; as shown in fig. 1, the apparatus includes: a raw water regulating reservoir (1), a high-efficiency electro-adsorption reactor (2) and a high-efficiency molecular distillation reactor (3).
2. The method for full-scale treatment of landfill leachate by utilizing electro-adsorption molecular distillation as claimed in claim 1, wherein: the high-salinity wastewater is subjected to turbidity removal, the pH value is adjusted to 4-5, and then the water quality and the water quantity are stabilized by a raw water adjusting tank (1); the effluent of the raw water regulating pool (1) is treated by the high-efficiency electro-adsorption reactor (2), the effluent of the high-efficiency electro-adsorption reactor (2) is discharged after reaching the standard, the concentrated solution of the high-efficiency electro-adsorption reactor enters the high-efficiency molecular distillation reactor (3), and the effluent of the high-efficiency molecular distillation reactor (3) is discharged after reaching the standard; the solid crystallization residue in the high-efficiency molecular distillation reactor (3) is periodically scraped.
3. Root of herbaceous plantThe method according to claims 1 and 2, characterized in that: the water quality condition of the treated percolate: pH value of 4-13, COD Cr 2900-95000 mg/L, 500-6000 mg/L ammonia nitrogen, BOD 5 300-5000 mg/L, TDS 5000-200000 mg/L.
4. The apparatus of claim 1, wherein: the tank body of the raw water adjusting tank is preferably made of PE anticorrosive materials, and a pH adjusting agent adding device is preset at a water inlet of the tank body and is used for adjusting the water quantity and the pH value of water.
5. The apparatus of claim 1, wherein: the electric adsorption reactor adopts electric adsorption reactor complete equipment, the model is DLT-DX, positive and negative electrodes are carbon electrode materials, the working voltage is 1.5V, and a manufacturer is Lishuideli water service equipment manufacturing company Limited.
6. The apparatus of claim 1, wherein: the high-efficiency molecular distillation reactor equipment preferably adopts a built-in condenser type, the model is SPD-100, and the heating area is 1M 2 The main body is made of industrial ceramics, the height of the equipment is 3.25M, the inner diameter of the equipment is 350mm, and the manufacturer is Wuxi Hengyi chemical machinery Co.
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| CN102674632A (en) * | 2012-05-21 | 2012-09-19 | 龙岩市康琦环保科技有限公司 | Garbage leachate zero-emission reuse treatment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102674632A (en) * | 2012-05-21 | 2012-09-19 | 龙岩市康琦环保科技有限公司 | Garbage leachate zero-emission reuse treatment method |
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