CN111499062A - Two-stage treatment process for landfill leachate based on DTRO and MVR - Google Patents
Two-stage treatment process for landfill leachate based on DTRO and MVR Download PDFInfo
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- CN111499062A CN111499062A CN201910986876.0A CN201910986876A CN111499062A CN 111499062 A CN111499062 A CN 111499062A CN 201910986876 A CN201910986876 A CN 201910986876A CN 111499062 A CN111499062 A CN 111499062A
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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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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/041—Treatment of water, waste water, or sewage by heating by distillation or evaporation by means of vapour compression
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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
- C02F1/66—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
- 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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/03—Pressure
Abstract
The invention discloses a two-stage treatment process of landfill leachate based on DTRO and MVR, which comprises the steps of acid regulation treatment of raw water; collecting raw water of leachate A generated by the refuse landfill by a pipe network, regulating the water quality and water quantity by a regulating reservoir, lifting the leachate A to a DT raw water tank by a floating pump, adding acid into the DT raw water tank, and regulating the pH of the raw water of the leachate A to obtain leachate B; sand filtration treatment; pressurizing the percolate B by a raw water pump, then feeding the percolate B into a quartz sand filter, arranging pressure gauges at the water inlet end and the water outlet end of the quartz sand filter, and executing a back washing program by the quartz sand filter when the pressure difference exceeds a set value to obtain a percolate C; performing core filtering treatment; and (5) treating the percolate C in a core type filter to obtain percolate D. The disc-tube type reverse osmosis membrane column provided by the invention has the advantages of strong pollution resistance, more durability, high integrated DTRO and MVR systems, small volume, compact layout, high efficiency, stable standard discharge of landfill leachate treatment by applying the MVR systems, and no return irrigation or outward transportation of concentrated solution.
Description
Technical Field
The invention relates to the technical field of garbage treatment, in particular to a two-stage treatment process of garbage leachate based on DTRO and MVR.
Background
When the humidity of the garbage pile body exceeds the water holding capacity, suspended or dissolved organic pollutants, heavy metals and other inorganic pollutants in the garbage pile body are dissolved out together, and seepage liquid is generated. At present, leachate is generated in municipal solid waste landfill treatment facilities in China about 6.4 ten thousand tons per day, and the leachate production amount is predicted to reach 3351 ten thousand tons per year in 2020.
In the existing landfill leachate treatment system, concentrated solution generated by membrane treatment cannot be effectively treated, an MVR system is easy to scale and block, and the traditional MVR system has the disadvantages of complex manufacturing structure, high construction cost, low evaporation treatment efficiency and large occupied area. Therefore, a two-stage treatment process based on DTRO and MVR for landfill leachate is provided.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a two-stage treatment process for landfill leachate based on DTRO and MVR.
The invention provides a two-stage treatment process for landfill leachate based on DTRO and MVR, which comprises the following steps:
s1: acid regulation treatment of raw water; collecting raw water of leachate A generated by the refuse landfill by a pipe network, regulating the water quality and water quantity by a regulating reservoir, lifting the leachate A to a DT raw water tank by a floating pump, adding acid into the DT raw water tank, and regulating the pH of the raw water of the leachate A to obtain leachate B;
s2: sand filtration treatment; pressurizing the percolate B in the S1 by a raw water pump, then feeding the percolate B into a quartz sand filter, arranging pressure gauges at the water inlet end and the water outlet end of the quartz sand filter, and executing a back washing program by the quartz sand filter when the pressure difference exceeds a set value to obtain a percolate C;
s3: performing core filtering treatment; the percolate C in the S2 enters a core type filter to be processed to obtain percolate D;
s4: processing by a two-stage DTRO membrane and MVR composite processing system; the leachate D in the S3 enters a two-stage DTRO membrane and MVR composite treatment system for treatment to obtain a leachate E;
s5: carrying out air stripping treatment; and (5) treating the percolate E in the S4 in a stripping tower to obtain a liquid F to be discharged, detecting the liquid F to be discharged, and discharging the liquid after reaching the standard after the detection is qualified.
Preferably, the number of the quartz sand filters in the step S1 is 1, and the filtering precision is 50 μm.
Preferably, the set value of the pressure difference in S2 is 2.5 bar.
Preferably, the filtering precision of the S3 core filter is 10 μm.
Preferably, in S3, the scale inhibitor is added before the core filter, and the scale inhibitor is diluted with 20 times of water for use.
Preferably, the two-stage DTRO membrane and MVR combined treatment system in S4 includes a first-stage DTRO, a second-stage DTRO and MVR system, the leachate E in S4 enters a first-stage DTRO membrane column group, the first-stage DTRO membrane column group is treated to generate a first-stage concentrated solution and a first-stage permeate, the first-stage permeate is discharged to the water inlet end of the second-stage DTRO, the second-stage permeate is generated after treatment, the second-stage permeate is the leachate E in S5, and the first-stage concentrate is discharged to a concentrate storage tank to be treated to obtain a second-stage concentrate.
Preferably, the primary DTRO membrane column set comprises a membrane module, and the membrane module adopts a disc-tube type reverse osmosis membrane column.
Preferably, the secondary concentrated solution is treated by an MVR system to obtain condensate and sludge, the condensate flows back to a two-stage DTRO membrane and MVR composite treatment system and is mixed with percolate D, the sludge generates waste liquid and solid waste after being subjected to flocculation and filter pressing treatment, and the waste liquid flows back to the DT raw water tank through a pipeline.
Preferably, the first-stage concentrated solution end and the second-stage concentrated solution end are both provided with pressure regulating valves, and the models of the two pressure regulating valves are VS1601 and VS2601 respectively.
Preferably, in S5, the liquid F to be discharged is subjected to pH detection in the clean water tank, and if the detection fails, the alkali is added for adjustment back.
The beneficial effects of the invention are as follows:
1. through the dish tubular reverse osmosis membrane post that sets up, the antipollution is strong, can be so that the effect of material exchange is better, and is very strong to the adaptability of filtration liquid, and the membrane is longe-lived, more durable.
2. High operating pressure's DTRO system can carry out high concentrated system, highly integrated DTRO and MVR system to landfill leachate, and small, the overall arrangement is compact, efficient, the adaptation operating mode is wide in range, installation maintenance is simple and convenient.
3. Unique MVR structural style can be effectual solve current MVR evaporation tubulation easy scale deposit, block up and the numerous and diverse problem that the construction cost is high of system, and the application of MVR system, rubbish infiltration liquid are handled and are stabilized discharge to reach standard, do not have concentrate to flow back or outward transport.
Drawings
FIG. 1 is a schematic flow diagram of a two-stage treatment process of landfill leachate based on DTRO and MVR according to the present invention;
fig. 2 is a schematic diagram of the flow process of leachate and concentrated solution in a membrane column based on a two-stage treatment process of DTRO and MVR landfill leachate according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1-2, a two-stage treatment process of landfill leachate based on DTRO and MVR comprises the following steps:
s1: acid regulation treatment of raw water; collecting raw water of leachate A generated by the refuse landfill by a pipe network, regulating the water quality and water quantity by a regulating reservoir, lifting the leachate A to a DT raw water tank by a floating pump, adding acid into the DT raw water tank, and regulating the pH of the raw water of the leachate A to obtain leachate B; the raw water is subjected to acid regulation, so that the scaling property of carbonate inorganic salt can be reduced, ammonia nitrogen is dissolved in water in an ionic state, and the retention rate of the ammonia nitrogen can be improved;
s2: sand filtration treatment; pressurizing the percolate B in the S1 by a raw water pump, then feeding the percolate B into a quartz sand filter, arranging pressure gauges at the water inlet end and the water outlet end of the quartz sand filter, and executing a back washing program by the quartz sand filter when the pressure difference exceeds a set value to obtain a percolate C; the backwashing frequency of the sand filter depends on the content of suspended matters in inlet water, the backwashing period of the sand filter is about 100 hours for a common refuse landfill, and for raw water with a lower SS value, the sand filter can be backwashed if the pressure difference does not exceed a set value after running for 100 hours so as to avoid the excessive compaction and hardening of quartz sand, and the backwashing is carried out according to the first arrival time. The sand filtration washing adopts raw water washing; the air washing uses compressed air generated by a rotary vane compressor;
s3: performing core filtering treatment; the percolate C in the S2 enters a core type filter to be processed to obtain percolate D; the core type filter mainly plays a role of security filtration and mainly intercepts solid particles which can exist when the medicament is added; the steps are pretreatment, and the main purpose is to remove larger particle solid matters in the garbage percolate so as to avoid damage to a reverse osmosis membrane and process equipment;
s4: processing by a two-stage DTRO membrane and MVR composite processing system; the leachate D in the S3 enters a two-stage DTRO membrane and MVR composite treatment system for treatment to obtain a leachate E;
s5: carrying out air stripping treatment; and (5) treating the percolate E in the S4 in a stripping tower to obtain a liquid F to be discharged, detecting the liquid F to be discharged, and discharging the liquid after reaching the standard after the detection is qualified.
The method comprises the steps that 1 quartz sand filter in S1 is provided, the filtering precision is 50 mu m, the set value of the pressure difference in S2 is 2.5bar, the filtering precision of a core filter in S3 is 10 mu m, calcium, magnesium, barium and other scaling-prone ions and silicate content in leachate C are high, the salts are easy to generate a supersaturated state on a concentrate side in subsequent treatment, a certain amount of scale inhibitor is added in front of the core filter to prevent silica scale and sulfate scaling phenomena according to actual water quality conditions, the specific addition amount is determined by raw water quality analysis conditions, 20 times of water is added to the scale inhibitor for dilution, the two-stage DTRO membrane and MVR combined treatment system in S4 comprises a first-stage DTRO, a second-stage DTRO and MVR system, a leachate E in S4 enters a first-stage DTRO membrane column group, the first-stage concentrate and first-stage permeate liquid can be generated after the treatment of the first-stage permeate liquid is discharged to a second-stage DTRO concentrate, the concentrate is discharged to a second-stage concentrate, the concentrate and the first-stage concentrate, the concentrate is discharged to a second-stage concentrate, the concentrate enters a reverse osmosis concentrate, the concentrate enters a second-stage concentrate, the concentrate enters a concentrate, the concentrate.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution and the inventive concept of the present invention should be covered by the scope of the present invention.
Claims (10)
1. A two-stage treatment process for landfill leachate based on DTRO and MVR is characterized by comprising the following steps:
s1: acid regulation treatment of raw water; collecting raw water of leachate A generated by the refuse landfill by a pipe network, regulating the water quality and water quantity by a regulating reservoir, lifting the leachate A to a DT raw water tank by a floating pump, adding acid into the DT raw water tank, and regulating the pH of the raw water of the leachate A to obtain leachate B;
s2: sand filtration treatment; pressurizing the percolate B in the S1 by a raw water pump, then feeding the percolate B into a quartz sand filter, arranging pressure gauges at the water inlet end and the water outlet end of the quartz sand filter, and executing a back washing program by the quartz sand filter when the pressure difference exceeds a set value to obtain a percolate C;
s3: performing core filtering treatment; the leachate C in the S2 enters a core filter to be treated to obtain leachate D;
s4: processing by a two-stage DTRO membrane and MVR composite processing system; the leachate D in the S3 enters a two-stage DTRO membrane and MVR composite treatment system for treatment to obtain a leachate E;
s5: carrying out air stripping treatment; and (5) treating the percolate E in the S4 in a stripping tower to obtain a liquid F to be discharged, detecting the liquid F to be discharged, and discharging the liquid after reaching the standard after the detection is qualified.
2. The two-stage treatment process for landfill leachate based on DTRO and MVR as claimed in claim 1, wherein the number of the quartz sand filters in S1 is 1, and the filtering precision is 50 μm.
3. The two-stage treatment process for landfill leachate based on DTRO and MVR as claimed in claim 1, wherein the set value of the pressure difference in S2 is 2.5 bar.
4. The two-stage treatment process for landfill leachate based on DTRO and MVR as claimed in claim 1, wherein the filtration precision of the S3 core filter is 10 μm.
5. The two-stage treatment process of landfill leachate based on DTRO and MVR as claimed in claim 1, wherein in S3, the antisludging agent is added before the core filter and diluted with 20 times of water for use.
6. The two-stage treatment process for landfill leachate based on DTRO and MVR as claimed in claim 1, wherein the two-stage DTRO membrane and MVR combined treatment system in S4 comprises a first-stage DTRO, a second-stage DTRO and MVR system, the leachate E in S4 enters a first-stage DTRO membrane column set, the first-stage DTRO membrane column set is treated to generate a first-stage concentrated solution and a first-stage permeate solution, the first-stage permeate solution is discharged to the water inlet end of the second-stage DTRO, the second-stage permeate solution is generated after treatment, the second-stage permeate solution is the leachate E in S5, and the first-stage concentrated solution is discharged to a concentrated solution storage tank to be treated to obtain a second-stage concentrated solution.
7. The two-stage treatment process for landfill leachate based on DTRO and MVR as claimed in claim 6, wherein the first stage DTRO membrane column set comprises membrane modules, and the membrane modules are disc-tube type reverse osmosis membrane columns.
8. The two-stage treatment process of landfill leachate based on DTRO and MVR as claimed in claim 6, wherein the secondary concentrated solution is treated by MVR system to obtain condensate and sludge, the condensate is returned to the two-stage DTRO membrane and MVR composite treatment system and mixed with leachate D, the sludge is flocculated and filter-pressed to generate waste liquid and solid waste, and the waste liquid is returned to the DT raw water tank through pipeline.
9. The two-stage treatment process for landfill leachate based on DTRO and MVR as claimed in claim 6, wherein the first stage concentrate and the second stage concentrate are both provided with pressure regulating valves, and the two pressure regulating valves are respectively VS1601 and VS 2601.
10. The two-stage treatment process for landfill leachate based on DTRO and MVR as claimed in claim 7, wherein in S5, the effluent F to be discharged is tested for pH value in the clean water tank, and if the test is not qualified, alkali is added for callback.
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| CN201910986876.0A CN111499062A (en) | 2019-10-17 | 2019-10-17 | Two-stage treatment process for landfill leachate based on DTRO and MVR |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112679019A (en) * | 2020-12-25 | 2021-04-20 | 成都硕特环保科技有限公司 | Garbage leachate total treatment method and system |
| CN112794580A (en) * | 2021-01-12 | 2021-05-14 | 无锡朗盼环境科技有限公司 | Landfill leachate treatment and discharge process |
| CN112960834A (en) * | 2021-02-08 | 2021-06-15 | 北京汲智科技有限公司 | Sewage treatment standard-reaching discharge process for kitchen waste leachate |
| CN113830954A (en) * | 2021-10-18 | 2021-12-24 | 南京万德斯环保科技股份有限公司 | Method for treating percolate of domestic garbage landfill |
| CN115259464A (en) * | 2022-08-05 | 2022-11-01 | 嘉戎技术(北京)有限公司 | Integrated industrial wastewater treatment system and method |
| CN116119887A (en) * | 2023-04-04 | 2023-05-16 | 南京博知源环境科技有限公司 | System treatment method suitable for landfill leachate |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109836020A (en) * | 2019-04-04 | 2019-06-04 | 北京高能时代环境技术股份有限公司 | A kind of processing system and method for mature landfill leachate zero-emission |
| CN209210569U (en) * | 2018-12-10 | 2019-08-06 | 北京合众清源环境科技有限公司 | The zero-discharge treatment system of landfill leachate |
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2019
- 2019-10-17 CN CN201910986876.0A patent/CN111499062A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209210569U (en) * | 2018-12-10 | 2019-08-06 | 北京合众清源环境科技有限公司 | The zero-discharge treatment system of landfill leachate |
| CN109836020A (en) * | 2019-04-04 | 2019-06-04 | 北京高能时代环境技术股份有限公司 | A kind of processing system and method for mature landfill leachate zero-emission |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112679019A (en) * | 2020-12-25 | 2021-04-20 | 成都硕特环保科技有限公司 | Garbage leachate total treatment method and system |
| CN112794580A (en) * | 2021-01-12 | 2021-05-14 | 无锡朗盼环境科技有限公司 | Landfill leachate treatment and discharge process |
| CN112960834A (en) * | 2021-02-08 | 2021-06-15 | 北京汲智科技有限公司 | Sewage treatment standard-reaching discharge process for kitchen waste leachate |
| CN113830954A (en) * | 2021-10-18 | 2021-12-24 | 南京万德斯环保科技股份有限公司 | Method for treating percolate of domestic garbage landfill |
| CN115259464A (en) * | 2022-08-05 | 2022-11-01 | 嘉戎技术(北京)有限公司 | Integrated industrial wastewater treatment system and method |
| CN116119887A (en) * | 2023-04-04 | 2023-05-16 | 南京博知源环境科技有限公司 | System treatment method suitable for landfill leachate |
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Application publication date: 20200807 |