CN113307419A - Small garbage transfer station leachate treatment device and treatment method - Google Patents
Small garbage transfer station leachate treatment device and treatment method Download PDFInfo
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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
-
- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
-
- 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
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46176—Galvanic cells
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
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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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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a small garbage transfer station leachate treatment device and a treatment method, wherein the device comprises a pretreatment unit, a micro-electrolysis unit, a membrane treatment unit and an intelligent control unit, wherein the pretreatment unit comprises a regulating tank and an air floatation tank which are communicated, a chemical feeding tank is arranged on the air floatation tank, an air floatation machine is arranged in the air floatation tank, and a residue scraping machine is paved at a water outlet of the air floatation tank; the micro-electrolysis unit comprises a group of iron-carbon micro-electrolysis columns; the membrane treatment unit comprises a primary DTRO membrane treatment device and a secondary DTRO membrane treatment device and is used for carrying out reverse osmosis membrane treatment on sewage. The leachate treatment device of the small garbage transfer station has a compact and centralized structure, and can provide an efficient and energy-saving method for building the small garbage transfer station in an area with short land resources.
Description
Technical Field
The invention relates to the technical field, in particular to a small garbage transfer station leachate treatment device and a treatment method.
Background
The accelerated urbanization process leads to more and more garbage generated by the life of urban residents in China, and in addition, the garbage disposal plants are far away from urban areas, so more and more garbage transfer stations are built to avoid the cost increase caused by the direct transfer of the garbage. At present, filter pressing liquid and ground washing water generated by domestic small and medium-sized garbage transfer stations are mostly directly discharged into municipal pipe networks in cities and towns, high-concentration and difficult-to-degrade organic matters (usually COD is more than 8000 mg/L) can impact the normal operation of municipal sewage treatment plants, a large amount of suspended matters can also cause the blockage of the municipal pipe networks, and the black and odorous water phenomenon in China is aggravated. Therefore, the leachate from the garbage transfer station must be effectively treated to minimize the environmental impact.
For example, the traditional biochemical treatment process mainly including an anaerobic-aerobic fermentation process is combined with treatment technologies such as coagulating sedimentation, reverse osmosis and the like, and although the effluent discharged up to the standard can be realized, the traditional biochemical treatment process also has the use defect which is difficult to overcome. For example, the application patent No. CN201720730310.8 proposes a biological denitrification device for landfill leachate, which constructs a primary nitrification tank, a secondary digestion tank and an MBR system in turn, but because the landfill leachate has higher BOD and COD concentration, higher content of heavy metal ions and larger change of water quality and water quantity, a better treatment effect can not be achieved by simply adopting a biochemical treatment facility; application patent number CN201911140557.4 provides a landfill leachate integration purifier, and the device has built up upflow oxidation tank, facultative tank, nitrosation reaction tank, anaerobic ammonium oxidation pond and mud-water separation from, has realized that the processing up to standard of organic matter, ammonia nitrogen and phosphorus is discharged, but the required land resource of this patent design is more, is not suitable for the large-scale use of building the small-size rubbish transfer station near the residential quarter.
In addition, the treatment method mainly adopts electrooxidation and is matched with electroflocculation and membrane filtration, and the garbage percolation concentrated solution with high difficulty and high cost is generally degraded by catalytic oxidation so as to reach the discharge standard of a storage water body. For example, application patent No. CN202010733387.7 proposes an electrode and a treatment method for concentrated solution of electrochemical landfill leachate, the electrode material in the patent is titanium-based ruthenium-iridium-titanium-praseodymium oxide, but such electrode is expensive, the electrode for treating the leachate mainly by the method has heavy loss and huge process power consumption, hydrogen and toxic and harmful chlorine are generated in the electrolysis process, and the electrode is not suitable for the scale application in small-sized garbage transfer stations. Application patent No. CN104478157A provides a treatment method of landfill leachate nanofiltration concentrated solution, and the treatment method adopts the series connection process of electrolysis and ozone oxidation, although the treatment effect can be improved, humic acid in the concentrated solution can react with active chlorine to generate toxic byproducts, thereby generating higher toxic products.
Disclosure of Invention
The invention aims to provide a small-sized garbage transfer station leachate treatment device by combining the current situation of the existing garbage transfer station and aiming at the defects in the prior art, so that the needs of economic and social development can be better met, and the problem of the garbage leachate of the transfer station is successfully solved.
The invention also aims to provide a method for treating percolate of the small-sized garbage transfer station.
The purpose of the invention is realized by the following technical scheme:
a small garbage transfer station leachate treatment device comprises a pretreatment unit, a micro-electrolysis unit, a membrane treatment unit and an intelligent control unit, wherein the pretreatment unit comprises a regulating tank and an air floatation tank which are communicated, a chemical feeding tank is arranged on the air floatation tank, an air floatation machine is arranged in the air floatation tank, and a residue scraping machine is laid at a water outlet of the air floatation tank; the micro-electrolysis unit comprises a group of iron-carbon micro-electrolysis columns; the membrane treatment unit comprises primary DTRO membrane treatment equipment and secondary DTRO membrane treatment equipment and is used for carrying out reverse osmosis membrane treatment on sewage; the water outlet of the air floatation tank is communicated with the water inlet at the lower end of the iron-carbon micro-electrolysis column, the water outlet at the upper end of the iron-carbon micro-electrolysis column is communicated with the water inlets of the first-stage DTRO membrane treatment equipment and the second-stage DTRO membrane treatment equipment, and the concentrated solution outlet of the two-stage DTRO membrane treatment equipment is respectively communicated with the water inlet of the iron-carbon micro-electrolysis column through a liquid return pipe; the water outlet of the two-stage DTRO membrane treatment equipment is respectively communicated with a municipal pipe network, and the water outlet of the first-stage DTRO membrane treatment equipment is also provided with a liquid return pipe communicated with the water inlet of the second-stage DTRO membrane treatment equipment; the intelligent control unit comprises a first water quality sensor, a second water quality sensor and an RTU device, wherein the first water quality sensor and the second water quality sensor are respectively arranged at water outlets of the first-stage DTRO membrane treatment equipment and the second-stage DTRO membrane treatment equipment, and are respectively connected with the RTU device and then transmit monitoring data to the client terminal through the base station.
In a further design scheme of the invention, the volume of the regulating pool is 200-3。
In a further design scheme of the invention, the volume of the air floatation tank is controlled to be 400-600 m3Three air floatation machines are arranged in the air floatation tank, and are respectively arranged at the front 10-15%, 45-55% and the tail end 75-90% of the air floatation tank. The three air flotation machines are operated in series, and suspended matters and partial organic matters are better removed through synergistic effect.
In a further design scheme of the invention, the medicine adding tank is positioned at 10-15% of the air floatation tank.
A method for treating percolate of a small garbage transfer station comprises the following specific steps:
And 3, allowing the wastewater treated by the air floatation tank to enter an iron-carbon micro-electrolysis column for micro-electrolysis treatment for 10-12h, and oxidizing organic matters which are difficult to degrade in the wastewater into micromolecular organic matters.
And 4, performing DTRO membrane treatment on the sewage treated by the iron-carbon micro-electrolysis column, separating treated water from concentrated solution by utilizing the reverse osmosis effect, returning the concentrated solution to the step 3 for treatment, discharging the treated water to a municipal pipe network after the treated water reaches the standard after being monitored by a water quality sensor, and returning the treated water which does not reach the standard to perform DTRO membrane treatment.
In a further design scheme of the invention, the volume of the regulating pool in the step 1 is 200-300 m3。
In a further design scheme of the invention, the volume of the air floatation tank in the step 2 is controlled to be 400-600 m3The aeration flow rate is 8-10L/h.
In a further design scheme of the invention, the volume of the iron-carbon micro-electrolysis column in the step 3 is 1400-1600 m3。
The invention has the following outstanding advantages:
the leachate treatment device of the small garbage transfer station has a compact and centralized structure, and can provide an efficient and energy-saving method for building the small garbage transfer station in an area with short land resources;
according to the invention, a group of iron-carbon micro-electrolysis cells is arranged in front of the DRTO membrane, so that macromolecular substances which are difficult to degrade are successfully converted into small molecular substances, the pollution of the DTRO membrane is effectively reduced, and the service life of the DTRO membrane is prolonged.
The concentrated solution generated by the DTRO membrane can be effectively treated, and the phenomenon of discharging the concentrated solution is avoided.
Drawings
FIG. 1 is a schematic structural diagram of a leachate treatment apparatus of a small-sized refuse transfer station in an embodiment;
in the figure, 1-a regulating tank, 2-an air flotation tank, 3-a dosing tank, 4-an air flotation machine, 5-a residue scraping machine, 6-an iron-carbon micro-electrolysis column, 7-first-stage DTRO membrane treatment equipment, 8-second-stage DTRO membrane treatment equipment, 9-a liquid return pipe, 10-an RTU device, 11-a base station and 12-a client terminal.
Detailed Description
The invention is further explained below with reference to the drawings and examples.
Examples
The utility model provides a small-size rubbish transfer station filtration liquid processing apparatus, includes preprocessing unit, little electrolysis unit, membrane processing unit and intelligent control unit, and preprocessing unit is including equalizing basin 1 and air supporting pond 2 that are linked together, and the volume of equalizing basin 1 is 200 and gives first place to 300 m3. The chemical feeding tank 3 is arranged on the air flotation tank 2, the chemical feeding tank 3 is positioned at 210-15% of the air flotation tank, and three air flotation machines 4 are arranged in the air flotation tank 2 and are respectively arranged at the front 10-15%, 45-55% and the tail end 75-90% of the air flotation tank 2. The three air floatation machines 4 are connected in series to better remove suspended matters and partial organic matters through synergistic effect, and the volume of the air floatation tank 2 is controlled to be 400-600 m3A slag scraper 5 is paved at the water outlet of the air floatation tank 2; the micro-electrolysis unit comprises a group of iron-carbon micro-electrolysis columns 6; the membrane treatment unit comprises a primary DTRO membrane treatment device 7 and a secondary DTRO membrane treatment device 8, and is used for carrying out reverse osmosis membrane treatment on sewage; the water outlet of the air floatation tank 2 is communicated with the water inlet at the lower end of the iron-carbon micro-electrolysis column 6, the water outlet at the upper end of the iron-carbon micro-electrolysis column 6 is communicated with the water inlets of the first-stage DTRO membrane treatment equipment 7 and the second-stage DTRO membrane treatment equipment 8, and the concentrated solution outlets of the two-stage DTRO membrane treatment equipment are respectively communicated with the water inlet of the iron-carbon micro-electrolysis column 6 through a liquid return pipe 9; the water outlets of the two-stage DTRO membrane treatment equipment are respectively communicated with a municipal pipe network, and the water outlet of the first-stage DTRO membrane treatment equipment 7 is also provided with a liquid return pipe 9 communicated with the water inlet of the second-stage DTRO membrane treatment equipment 8; the intelligent control unit comprises a first water quality sensor, a second water quality sensor and an RTU device 10, wherein the first water quality sensor and the second water quality sensor are respectively arranged at water outlets of a first-stage DTRO membrane treatment device 7 and a second-stage DTRO membrane treatment device 8, the first water quality sensor and the second water quality sensor are respectively connected with the RTU device 10, and then monitoring data are transmitted to a client terminal 12 through a base station 11.
The method for treating the percolate of the small garbage transfer station comprises the following specific steps:
the quality of the taken inlet water is that COD is 50000-4 +N is 1200-1500 mg/L, SS is 12000-15000 mg/L.
And 2, after the wastewater enters the air flotation tank 2, adding PAC and ferrous sulfate in the chemical adding tank 3 into the wastewater in the air flotation tank 2, wherein the chemical adding tank 3 is positioned at 210-15% of the air flotation tank, the construction of the air flotation tank 2 is determined according to the construction of an air flotation machine 4, and the purpose of the construction is mainly to reduce the adding of agents such as PAC and ferrous sulfate and the like, so that the operation cost is reduced to the maximum extent. Carrying out aeration treatment for 7-9h by using an air floatation machine 4, and controlling the volume of an air floatation tank 2 at 400-600 m3The aeration flow rate is 8-10L/h. Removing large precipitated particles and partial COD by using a slag scraper 5; the chemical adding flow is controlled to be 200-400 mg/L, and the first separation of the mud and the water is completed.
3, allowing the wastewater treated by the air floatation tank 2 to enter an iron-carbon micro-electrolysis column 6 for micro-electrolysis treatment for 10-12h, and oxidizing organic matters which are difficult to degrade in the wastewater into micromolecular organic matters; the volume of the iron-carbon micro-electrolysis column 6 is 1400-1600 m3After micro-electrolysis treatment, the water quality index of the sewage is as follows: COD less than or equal to 1000 mg/L, NH4 +N is 200-300 mg/L, SS is less than or equal to 100mg/L, and the number of pathogenic bacteria is more than 1000 CFU/100 mL.
Percolate through small garbage transfer stationAfter the integrated intensive treatment equipment is used for treatment, the effluent of the system can reach COD (chemical oxygen demand) less than or equal to 100mg/L and NH4 +N is less than or equal to 15mg/L, SS is less than or equal to 100mg/L, pH is 6-9, and the number of pathogenic bacteria is less than 1 CFU/100 mL.
The above are preferred embodiments of the present invention, and all changes made according to the technical scheme of the present invention that produce functional effects do not exceed the scope of the technical scheme of the present invention belong to the protection scope of the present invention.
Claims (8)
1. The small-sized garbage transfer station leachate treatment device is characterized by comprising a pretreatment unit, a micro-electrolysis unit, a membrane treatment unit and an intelligent control unit, wherein the pretreatment unit comprises an adjusting tank (1) and an air floatation tank (2) which are communicated, a chemical feeding tank (3) is arranged on the air floatation tank (2), an air floatation machine (4) is arranged in the air floatation tank (2), and a residue scraping machine (5) is paved at a water outlet of the air floatation tank (2); the micro-electrolysis unit comprises a group of iron-carbon micro-electrolysis columns (6); the membrane treatment unit comprises a primary DTRO membrane treatment device (7) and a secondary DTRO membrane treatment device (8) and is used for carrying out reverse osmosis membrane treatment on sewage; the water outlet of the air floatation tank (2) is communicated with the water inlet at the lower end of the iron-carbon micro-electrolysis column (6), the water outlet at the upper end of the iron-carbon micro-electrolysis column (6) is communicated with the water inlets of the first-stage DTRO membrane treatment equipment (7) and the second-stage DTRO membrane treatment equipment (8), and the concentrated solution outlet of the two-stage DTRO membrane treatment equipment is respectively communicated with the water inlet of the iron-carbon micro-electrolysis column (6) through a liquid return pipe (9); the water outlets of the two-stage DTRO membrane treatment equipment are respectively communicated with a municipal pipe network, and the water outlet of the one-stage DTRO membrane treatment equipment (7) is also provided with a liquid return pipe (9) communicated with the water inlet of the two-stage DTRO membrane treatment equipment (8); the intelligent control unit comprises a first water quality sensor, a second water quality sensor and an RTU device (10), wherein the first water quality sensor and the second water quality sensor are respectively arranged at water outlets of a first-stage DTRO membrane treatment device (7) and a second-stage DTRO membrane treatment device (8), the first water quality sensor and the second water quality sensor are respectively connected with the RTU device (10), and then monitoring data are transmitted to a client terminal (12) through a base station (11).
2. The leachate treatment apparatus of claim 1, wherein the volume of the conditioning tank (1) is 200-300 m3。
3. The leachate treatment apparatus of claim 1, wherein the volume of the flotation tank (2) is controlled to 400-600 m3Three air floating machines (4) in the air floating tank (2) are respectively arranged at the front 10-15%, 45-55% and the tail end 75-90% of the air floating tank (2), and the three air floating machines are connected in series for operation.
4. The small-sized refuse transfer station percolate treatment device according to claim 1, characterised in that the dosing tank (3) is located at 10-15% of the flotation tank (2).
5. A method for treating percolate of a small garbage transfer station is characterized by comprising the following specific steps:
step 1, regulating and controlling the quality and quantity of dental acid from a garbage transfer station and wastewater generated by vehicle transportation in a regulating tank (1);
step 2, after the wastewater enters the air floatation tank (2), adding PAC and ferrous sulfate in the chemical adding tank (3) into the wastewater in the air floatation tank (2), carrying out aeration treatment for 7-9h by using an air floatation machine (4), and removing large precipitated particles and partial COD by using a slag scraper (5); the medicine adding flow is controlled to be 200-400 mg/L;
3, allowing the wastewater treated by the air floatation tank (2) to enter an iron-carbon micro-electrolysis column (6) for micro-electrolysis treatment for 10-12h, and oxidizing refractory organics in the wastewater into micromolecular organics;
and 4, performing DTRO membrane treatment on the sewage treated by the iron-carbon micro-electrolysis column (6), separating treated water from concentrated solution by utilizing the reverse osmosis effect, returning the concentrated solution to the step 3 for treatment, discharging the treated water to a municipal pipe network after the treated water reaches the standard after being monitored by a water quality sensor, and returning the treated water which does not reach the standard to perform DTRO membrane treatment.
6. The method for treating percolate at small refuse transfer station according to claim 5, wherein the volume of the adjusting tank (1) in step 1 is 200-300 m3。
7. The method for treating percolate at small refuse transfer station according to claim 5, wherein the volume of the floatation tank (2) in step 2 is controlled to 400-600 m3The aeration flow rate is 8-10L/h.
8. The method for treating percolate at small refuse transfer station according to claim 5, wherein the volume of the iron-carbon micro-electrolysis column (6) in step 3 is 1400-1600 m3。
Priority Applications (1)
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CN202110557627.7A CN113307419A (en) | 2021-05-21 | 2021-05-21 | Small garbage transfer station leachate treatment device and treatment method |
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CN113697966A (en) * | 2021-09-02 | 2021-11-26 | 南京信息工程大学 | Treatment system and treatment method for mariculture wastewater |
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CN209872690U (en) * | 2019-04-12 | 2019-12-31 | 浙江慧丰环保科技有限公司 | Leachate treatment process device for garbage transfer station |
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