CN110316893A - A kind of integrated treatment process of landfill leachate - Google Patents
A kind of integrated treatment process of landfill leachate Download PDFInfo
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- CN110316893A CN110316893A CN201910648999.3A CN201910648999A CN110316893A CN 110316893 A CN110316893 A CN 110316893A CN 201910648999 A CN201910648999 A CN 201910648999A CN 110316893 A CN110316893 A CN 110316893A
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- landfill 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
- 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
-
- 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
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a kind of integrated treatment process of landfill leachate, comprising the following steps: (1) landfill leachate pre-processes；(2) pretreatment water outlet is filtered concentration into level-one DTRO；(3) level-one DTRO concentrate carries out oxidation processes；(4) water outlet is further concentrated into HP-DTRO after oxidation processes；(5) concentrate is evaporated through function of mechanical steam recompression (MVR), by dry carnallite；Divide carnallite progress thermal method to salt treatment；(6) level-one DTRO produces water and HP-DTRO production water enters second level DTRO and handled, and the concentrate recirculation that second level DTRO is generated continues to filter in level-one DTRO.A kind of advanced treatment process of integrated " high-level oxidation technology+high pressure disc tube reverse osmosis (dt-ro) (HP-DTRO) " processing DTRO concentrate is provided, the critical issue that DTRO concentrate Treatment and recovery utilizes is solved, realizes the zero-emission of landfill leachate.
Description
Technical field
The present invention relates to field of waste water treatment more particularly to a kind of integrated treatment process of landfill leachate.
Background technique
Landfill leachate is the high concentrated organic wastewater generated in garbage loading embeading, complicated component, and water quality and quantity changes greatly, and
Organic matter containing more difficult for biological degradation, such as organic heterocyclic (heterocycle, polycyclic aromatic hydrocarbon), esters of gallic acid, amides, account for about
70% or more of the total organic component of landfill leachate handles difficulty using conventional biological method, and operation needs higher strip part.
Reverse osmosis is one of common water treatment technology, is usually used in the advanced treating of waste water.Disc tube reverse osmosis (dt-ro) (DTRO)
Using open runner design, antifouling property is excellent, can the stable operation under the severe condition of water quality of high COD, the rate of recovery is high,
Waste water can be further reduced to concentration.DTRO concentrate complicated component, COD, salt content are high, the processing and outlet of DTRO concentrate
As critical issue urgently to be resolved.
High-level oxidation technology (AOPs) electricity, chemical oxidizing agent, the light the effects of under generate the hydroxyl with Strong oxdiative ability
Free radical (OH).There is hydroxyl radical free radical stronger oxidative degradation ability can make organic pollutant (especially difficult for biological degradation
Organic matter) mineralising, resolve into carbon dioxide and water.This method is more thorough due to decomposing to organic matter, in recent years in rubbish
Percolate process field attracts wide public concern.
Summary of the invention
The present invention is directed to the deficiency of existing treatment process, provides a kind of integrated treatment process of landfill leachate, especially relates to
And a kind of advanced treatment process of DTRO concentrate.The technical scheme to solve the above technical problems is that a kind of rubbish
The integrated treatment process of percolate, the technical process include:
(1) landfill leachate pre-processes；
(2) pretreatment water outlet is filtered concentration into level-one disc tube reverse osmosis (dt-ro) DTRO；
(3) level-one DTRO concentrate carries out oxidation processes；
(4) water outlet is further concentrated into HP-DTRO after oxidation processes；
(5) concentrate is evaporated through function of mechanical steam recompression (MVR), by dry carnallite；Divide carnallite progress thermal method to salt
Processing；
(6) level-one DTRO, which produces water and HP-DTRO and produces water and enter second level DTRO, is handled, the concentrate recirculation that second level DTRO is generated in
Level-one DTRO continues to filter.
Preferably, the pretreatment in the step (1) is coagulating sedimentation and sand filtration.
Preferably, oxidation processes are catalytic and oxidative electrolysis technology method, Fenton oxidation method, ozone oxygen oxidizing process in the step (3)
One of or its coupling technique, the removal rate of the high-level oxidation technology COD (COD) be greater than 65%.
Preferably, advanced oxidation water outlet is further concentrated in HP-DTRO in the step (4), the operation of HP-DTRO
Pressure is 12 MPa, and removal efficiency is greater than 99%.
Preferably, according to the water quality characteristics of landfill leachate, processing step (1)-(4) can be adjusted to landfill leachate and first pass through
Enter pretreatment after oxidation processes, pretreatment water outlet enters after level-one DTRO is filtered concentration, concentrate enter HP-DTRO after
It is continuous to be concentrated.
In the present invention, concentrated water is as the meaning of concentrate.
The beneficial effects of the invention are as follows use " advanced oxidation+high pressure disc tube reverse osmosis (dt-ro) (HP-DTRO) " advanced treating skill
Art handles disc tube reverse osmosis (dt-ro) (DTRO) concentrate；Degradable biological method is difficult to the organic matter degraded, and carries out innoxious place to it
Reason solves the critical issue that DTRO concentrate Treatment and recovery utilizes, realizes the zero-emission of landfill leachate, substitute traditional
The disposal options of landfill leachate concentration liquid recharge.
Detailed description of the invention
Fig. 1 is a kind of integrated treatment process flow chart of landfill leachate.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
Embodiment 1
Certain consumer waste infiltration liquid, main parenchyma index PH=7.78, conductivity 18,000 μ S/cm, CODcr: 6800 mg/
L.Treatment process is as follows:
Acid adding adjusts landfill leachate stoste pH, into quartz filter, 50 um of filtering accuracy.Scale inhibition is added in sand filtration water outlet
Enter cartridge filter after agent, filtering accuracy is 10 um.Water outlet enters level-one DTRO and is filtered concentration, and cycles of concentration is about 5
Times.Concentrate enters catalytic and oxidative electrolysis technology equipment and is electrolysed, COD removal rate 75%.Catalytic and oxidative electrolysis technology water outlet enters 12 MPa
HP-DTRO be filtered concentration, removal efficiency 99%, the rate of recovery about 40%.High concentration concentrate is evaporated through function of mechanical steam recompression
The moisture for falling 80%, by dry carnallite.Carnallite is dissolved to nearly saturated aqueous solution, in evaporator section control temperature in 110-120
DEG C, the higher sodium sulphate of purity is obtained, the mother liquor solution based on sodium chloride is able to by crystallisation by cooling section, mother liquor is sent to salt and is evaporated
Device obtains sodium chloride.Level-one DTRO produces water and HP-DTRO produces water and enters second level DTRO, effluent quality CODcr:32 mg/L.
Embodiment 2
Certain refuse landfill landfill leachate, water quality indicator are as follows: PH=8.24, conductivity 42,000 μ S/cm, CODcr:5360
mg/L.Treatment process is as follows:
Acid adding adjusts landfill leachate stoste pH, is handled into sand filter and cartridge filter, sand filters precision is
100 um.Sand filtration water outlet enters cartridge filter after antisludging agent is added, and filtering accuracy is 10 um.Water outlet enter level-one DTRO into
Row filtering and concentrating, about 4 times of cycles of concentration.Concentrate enters the three-dimensional electrolysis oxidation equipment equipped with clast class active carbon filler
It is electrolysed, COD removal rate 82%.The HP-DTRO of catalytic and oxidative electrolysis technology water outlet into 12 MPa are filtered concentration, removal efficiency
99.9%, high concentration concentrate evaporates 80% moisture through function of mechanical steam recompression, by dry carnallite.Carnallite is through being dissolved to
Nearly saturated aqueous solution obtains the higher sodium sulphate of purity, obtains by crystallisation by cooling section in evaporator section control temperature at 110-120 DEG C
Mother liquor is sent to salt evaporator and obtains sodium chloride by the mother liquor solution based on sodium chloride.Level-one DTRO produce water and HP-DTRO produce water into
Enter second level DTRO, CODcr: 20 mg/L of water quality indicator.
Table 1 is certain refuse landfill landfill leachate index；
Certain the refuse landfill landfill leachate index of table 1
| Project | Unit | Detection data | Remarks |
| pH | —— | 8.24 | |
| Conductivity | us/cm | 42000 | |
| Total hardness | mg/L | 1780 | With calcium carbonate |
| Calcium hardness | mg/L | 240 | With calcium carbonate |
| Total alkalinity | mg/L | 13000 | With calcium carbonate |
| CODcr | mg/L | 5360 | |
| Chloride | mg/L | 10346 | |
| Ammonia nitrogen | mg/L | 3200 | |
| Sulfate | mg/L | 275 |
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, all in the spirit and principles in the present invention
Within, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of integrated treatment process of landfill leachate, which comprises the following steps:
(1) landfill leachate pre-processes；
(2) pretreatment water outlet is filtered concentration into level-one DTRO；
(3) level-one DTRO concentrated water carries out oxidation processes；
(4) water is produced after oxidation processes to enter HP-DTRO and be further concentrated；
(5) concentrated water is evaporated through function of mechanical steam recompression (MVR), by dry carnallite；Carnallite progress thermal method is divided at salt
Reason；
(6) level-one DTRO, which produces water and HP-DTRO and produces water and enter second level DTRO, is handled, the concentrate recirculation that second level DTRO is generated in
Level-one DTRO continues to filter.
2. the integrated treatment process of landfill leachate according to claim 1, which is characterized in that in the step (1)
Pretreatment is coagulating sedimentation and sand filtration.
3. the integrated treatment process of landfill leachate according to claim 1, which is characterized in that in the step (3)
Oxidation processes are one of catalytic and oxidative electrolysis technology method, Fenton oxidation method, Ozonation or its coupling technique.
4. the integrated treatment process of landfill leachate according to claim 1, which is characterized in that in the step (4)
The operating pressure of HP-DTRO is 12 MPa.
5. the integrated treatment process of landfill leachate according to claim 1 to 4, which is characterized in that the step
(1)-(4) are that landfill leachate is first oxidation-treated rear into pretreatment, and pretreatment water outlet is filtered dense into level-one DTRO
After contracting, concentrated water enters HP-DTRO and continues to be concentrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910648999.3A CN110316893A (en) | 2019-07-18 | 2019-07-18 | A kind of integrated treatment process of landfill leachate |
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| CN201910648999.3A CN110316893A (en) | 2019-07-18 | 2019-07-18 | A kind of integrated treatment process of landfill leachate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111252961A (en) * | 2020-01-21 | 2020-06-09 | 四川大学 | Treatment method of garbage penetrating fluid |
| CN111320316A (en) * | 2020-03-13 | 2020-06-23 | 北京洁绿环境科技股份有限公司 | Landfill leachate membrane concentrated solution treatment method |
| 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 |
| CN113200633A (en) * | 2021-05-28 | 2021-08-03 | 东方电气集团东方锅炉股份有限公司 | Method and system for producing hydrogen by using landfill leachate |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111252961A (en) * | 2020-01-21 | 2020-06-09 | 四川大学 | Treatment method of garbage penetrating fluid |
| CN111320316A (en) * | 2020-03-13 | 2020-06-23 | 北京洁绿环境科技股份有限公司 | Landfill leachate membrane concentrated solution treatment method |
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| CN113200633A (en) * | 2021-05-28 | 2021-08-03 | 东方电气集团东方锅炉股份有限公司 | Method and system for producing hydrogen by using landfill leachate |
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