CN113896368A - Full-quantitative treatment method for leachate of refuse landfill - Google Patents
Full-quantitative treatment method for leachate of refuse landfill Download PDFInfo
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- CN113896368A CN113896368A CN202111032697.7A CN202111032697A CN113896368A CN 113896368 A CN113896368 A CN 113896368A CN 202111032697 A CN202111032697 A CN 202111032697A CN 113896368 A CN113896368 A CN 113896368A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000012528 membrane Substances 0.000 claims abstract description 33
- 230000003647 oxidation Effects 0.000 claims abstract description 15
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 14
- 150000003839 salts Chemical class 0.000 claims abstract description 12
- 238000002485 combustion reaction Methods 0.000 claims abstract description 11
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000001704 evaporation Methods 0.000 claims abstract description 6
- 230000008020 evaporation Effects 0.000 claims abstract description 6
- 238000013139 quantization Methods 0.000 claims abstract description 6
- 230000009615 deamination Effects 0.000 claims abstract description 5
- 238000006481 deamination reaction Methods 0.000 claims abstract description 5
- 238000004659 sterilization and disinfection Methods 0.000 claims description 16
- 239000007789 gas Substances 0.000 claims description 10
- 239000000243 solution Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000002351 wastewater Substances 0.000 claims description 9
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 7
- 230000001376 precipitating effect Effects 0.000 claims description 7
- 238000001556 precipitation Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 230000002378 acidificating effect Effects 0.000 claims description 5
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 239000011575 calcium Substances 0.000 claims description 4
- 229910001424 calcium ion Inorganic materials 0.000 claims description 4
- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 4
- 239000008267 milk Substances 0.000 claims description 4
- 210000004080 milk Anatomy 0.000 claims description 4
- 235000013336 milk Nutrition 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 230000003311 flocculating effect Effects 0.000 claims description 3
- 238000005457 optimization Methods 0.000 claims description 3
- 239000011550 stock solution Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 description 11
- 239000000149 chemical water pollutant Substances 0.000 description 10
- 230000004907 flux Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 239000002957 persistent organic pollutant Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 238000001223 reverse osmosis Methods 0.000 description 3
- 208000005623 Carcinogenesis Diseases 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical class OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 2
- 150000001491 aromatic compounds Chemical class 0.000 description 2
- 230000036952 cancer formation Effects 0.000 description 2
- 231100000504 carcinogenesis Toxicity 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000006385 ozonation reaction Methods 0.000 description 2
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 150000001448 anilines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000002173 cutting fluid Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000001728 nano-filtration Methods 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
Classifications
-
- 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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- 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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
-
- 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
- C02F1/52—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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- 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
-
- 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
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
Landscapes
- 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)
Abstract
The invention relates to the technical field of concentrated solution treatment, in particular to a full-quantization treatment method for leachate in a refuse landfill, which comprises the following steps of softening and hardness removal of the leachate, filtering by a DTRO (draw texturing yarn) membrane system, treating the concentrated solution, reducing the concentrated water separated in the step two by a high-pressure DTRO membrane system, introducing a combustion system for evaporation treatment, converting organic matters and inorganic salts which are difficult to degrade into salt mud for landfill, and introducing the filtered water separated in the step three into a deamination membrane system and a high-grade oxidation system to remove ammonia nitrogen in the filtered water.
Description
Technical Field
The invention relates to the technical field of concentrated solution treatment, in particular to a full-scale treatment method for leachate of a refuse landfill.
Background
During the stacking and burying process of garbage, due to the biochemical degradation effects of compaction, fermentation and the like, a high-concentration liquid with organic or inorganic components is generated under the seepage action of precipitation and underground water, and the high-concentration liquid is called as garbage leachate, also called as leachate. The factors influencing the generation of percolate are many, and mainly include rainfall condition of a garbage stacking and burying area, the property and the composition of garbage, seepage-proofing treatment condition of a landfill site, hydrogeological conditions of the site and the like
The landfill leachate has the characteristics of high ammonia nitrogen content, high organic pollutant concentration, high salt content, complex components, large fluctuation range of water quality and water quantity change and the like. The current mainstream treatment process is 'pretreatment + MBR biochemical unit + nanofiltration + reverse osmosis', the process can effectively ensure that indexes such as COD, ammonia nitrogen and the like of the effluent stably reach the standard of GB16889-2008 table 2, and the effluent quality is good. But the prior treatment process has the main defects that: the reverse osmosis concentrated water is difficult to treat and has high salt content, and the concentrated water is mostly re-filled into a landfill site at present, so that the method inevitably causes the salt content of the percolate to increase day by day, and the post-treatment difficulty is increased more and more. Meanwhile, the reverse osmosis membrane has higher cost.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a full-quantization treatment method for the leachate of the refuse landfill, which has high refuse utilization rate and good environmental protection effect.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a full-quantization treatment method for leachate of a refuse landfill comprises the following steps:
softening and removing hardness of leachate, namely reducing the hardness and alkalinity of leachate stock solution by adopting a chemical softening and softening membrane system;
step two, DTRO filtration, namely performing graded filtration on the percolate to separate the percolate into concentrated water and clear water;
step three, treating concentrated solution, namely reducing the concentrated water separated in the step two by a high-pressure DTRO membrane system, introducing the concentrated water into a combustion system for evaporation treatment, converting refractory organic matters and inorganic salts into salt mud for landfill, and introducing the filtered water separated in the step into a deamination membrane system to remove ammonia nitrogen in the filtered water;
and step four, leachate optimization, namely introducing the filtered water subjected to ammonia nitrogen removal in the step three into an advanced oxidation treatment system to remove residual organic matters, so that the wastewater is discharged after reaching the standard.
In order to improve the purification effect of the landfill leachate, the invention has the improvement that the pretreatment system comprises a reaction tank, a softening membrane system and a crushing tank, and the pretreatment step comprises the following steps: adding a certain amount of lime milk into the reaction tank, reacting with a ferric trichloride solution, flocculating and precipitating, then precipitating calcium and magnesium ions in a precipitation form, feeding the obtained mixed solution into a softening membrane system for solid-liquid separation, softening and removing hardness, and removing partial organic matters in the wastewater, wherein the hardness content in the treated water is less than 180 mg/L.
In order to improve the utilization effect of the garbage, the invention improves that the heat source of the combustion system is landfill gas of a garbage landfill.
In order to improve the purification effect of filtered water, the advanced oxidation system comprises an acidic filter tank, an alkaline filter tank, an ozone oxidation tank and a disinfection tank, wherein the acidic filter tank is connected with the alkaline filter tank, the alkaline filter gear tank is connected with the ozone oxidation tank, the output end of the ozone oxidation tank is connected with the disinfection tank, the disinfection tank is connected with a clean water tank, and an ultraviolet disinfection device is arranged in the disinfection tank.
(III) advantageous effects
Compared with the prior art, the invention provides a full-quantitative treatment method for leachate of a refuse landfill, which has the following beneficial effects:
the invention firstly softens and removes hardness of the leachate in the refuse landfill, and has the separation effect of the high DTRO membrane.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention relates to a full-quantization treatment method of leachate of a refuse landfill, which comprises the following steps:
softening and removing hardness of leachate, namely reducing the hardness and alkalinity of leachate stock solution by adopting a chemical softening and softening membrane system;
step two, DTRO filtration, namely performing graded filtration on the percolate to separate the percolate into concentrated water and clear water;
step three, treating concentrated solution, namely reducing the concentrated water separated in the step two by a high-pressure DTRO membrane system, introducing the concentrated water into a combustion system for evaporation treatment, converting refractory organic matters and inorganic salts into salt mud for landfill, and introducing the filtered water separated in the step into a deamination membrane system to remove ammonia nitrogen in the filtered water;
and step four, leachate optimization, namely introducing the filtered water subjected to the internal ammonia nitrogen removal in the step three into an advanced oxidation treatment system to remove residual organic matters, so that the wastewater is discharged after reaching the standard.
The landfill leachate has complex water quality and contains various toxic and harmful inorganic matters and organic matters. Among them, there are over 99 kinds of organic pollutants detected by technology, and 22 kinds of organic pollutants are listed in the central control lists of the national environmental protection Bureau of China and the environmental protection agency of the United states, one can directly cause carcinogenesis, and five can induce carcinogenesis. Besides, the leachate also contains non-chlorinated aromatic compounds such as naphthalene and phenanthrene, chlorinated aromatic compounds, phosphoric acid vinegar, phenolic compounds, aniline compounds and the like which are difficult to biodegrade.
The highest concentration of CODcr and BOD5 in the landfill leachate can reach thousands to tens of thousands, and compared with municipal sewage, the concentration is much higher, so the leachate can not be directly discharged into a municipal sewage treatment pipeline without strict treatment and disposal. In general, CODcr, BOD5, BOD5/CODcr decrease with "age" of the landfill and alkalinity levels increase.
In this embodiment, the pretreatment system includes a reaction tank and a softening membrane system, and the pretreatment includes: adding a certain amount of lime milk into the reaction tank, reacting with a ferric trichloride solution, flocculating and precipitating, then precipitating calcium and magnesium ions in a precipitation form, feeding the obtained mixed solution into a softening membrane system for solid-liquid separation, softening and removing hardness, and removing partial organic matters in the wastewater, wherein the hardness content in the treated water is less than 180 mg/L.
Experiments prove that; when the leachate after biological treatment is flocculated and precipitatedIron or aluminum salts as flocculants) even at low p (BOD5) ((b)<25mg/L), the removal rate of CODcr can still reach 50%, the optimal pH value in the reaction process is 4.5-4.8 and 5.0-5.5 for iron salt and aluminum salt respectively, and the minimum dosage is 500 g/m-3In the meantime.
The softening membrane is high in flux, the tubular softening membrane is used for softening the landfill leachate because the flux is high, the softening work of the landfill leachate is severe, the conversion efficiency of the landfill leachate is required to be high in unit time, the high flux can smoothly reach the preset efficiency, meanwhile, the phenomena of blockage and the like are greatly reduced under the condition of ensuring the running flux, and the tubular softening membrane is particularly suitable for treating metal oxide dyes or various high-suspension waste water. But the backwash simultaneously, because many places are higher to the softened requirement of landfill leachate, except that softening only still has multiple functions, this kind of tubular softening membrane can carry out the backwash to the effectual appearance of avoidng various follow-up problems has also satisfied the demand in various different places simultaneously, also just because tubular rate ization membrane can backwash, so also can be used to the cooling cycle water blow off water. Furthermore, the chemical performance is excellent, the landfill leachate softening relates to discharge of various metal oxides, oxide dyes, polycrystalline silicon cutting fluid or desulfurization wastewater, and the like, so that the softening environment is worse, higher requirements are placed on softening equipment, the softening effect is ensured, the safety of the tubular softening membrane is ensured, and the service life of the tubular softening membrane has excellent chemical performance so that the tubular softening membrane can be applied to various environments.
In this embodiment, the heat source of the combustion system is landfill gas of a refuse landfill, and the landfill gas of the refuse is used to heat the combustion system to improve energy.
Landfill gas collection takes two forms, active collection and passive collection.
The active guide and exhaust system is mainly used for collecting the gas in a mode of arranging a collecting vertical shaft, and meanwhile, the collecting main pipe is used for collecting the gas, and the gas is conveyed to the torch system for combustion treatment after being collected. Or power generation and internet surfing are realized under the condition of large gas amount, so that clean energy is realized.
In this embodiment, advanced oxidation system includes acid filtering ponds, alkaline filtering ponds, ozonation pond and disinfection pond, and acid filtering ponds connects alkaline filtering ponds, ozone oxidation pond is connected to alkaline filtering gear pond, the disinfection pond is connected to ozonation pond output, the clean water basin is connected to the disinfection pond, be provided with ultraviolet ray disinfection device in the disinfection pond, make materials such as residual organic matter in the filtration liquid, COD obtain fully decomposing, improve the purifying effect of drainage.
To sum up, the full-quantization treatment method of the landfill leachate comprises the steps of adding a certain amount of lime milk into a reaction tank to react with ferric trichloride solution for flocculation and precipitation, precipitating calcium and magnesium ions in a precipitation form, enabling the obtained mixed solution to enter a softening membrane system for solid-liquid separation, softening and removing hardness, removing partial organic matters in wastewater, enabling the hardness content in the treated water to be less than 180mg/L, enabling concentrated water separated from a DTRO membrane to be subjected to secondary reduction treatment of a high-pressure DTRO membrane system, then introducing the concentrated water into a combustion system for evaporation treatment, improving energy sources of the combustion system through landfill gas of garbage, enabling the solution to achieve the effects of evaporation and concentration, realizing the separation of salt mud and filtered water, introducing the separated filtered water into a deamination membrane system, realizing the removal of ammonia nitrogen in the filtered water, and then passing through an acidic filter tank, an alkaline filter tank, an ozone oxidation tank and a disinfection water tank, the residual organic matters, COD and other substances in the percolate are fully decomposed, and the purification effect of the filtered water is improved.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A full-quantization treatment method for leachate of a refuse landfill is characterized by comprising the following steps:
softening and removing hardness of leachate, namely reducing the hardness and alkalinity of leachate stock solution by adopting a chemical softening and softening membrane system;
step two, DTRO filtration, namely performing graded filtration on the percolate to separate the percolate into concentrated water and clear water;
step three, treating concentrated solution, namely reducing the concentrated water separated in the step two by a high-pressure DTRO membrane system, introducing the concentrated water into a combustion system for evaporation treatment, converting refractory organic matters and inorganic salts into salt mud for landfill, and introducing the filtered water separated in the step into a deamination membrane system to remove ammonia nitrogen in the filtered water;
and step four, leachate optimization, namely introducing the filtered water subjected to ammonia nitrogen removal in the step three into an advanced oxidation treatment system to remove residual organic matters, so that the wastewater is discharged after reaching the standard.
2. The fully-quantized treatment method for percolate of refuse landfill according to claim 1, wherein the pretreatment system comprises a reaction tank, a softening membrane system and a crushing tank, and the pretreatment step comprises: adding a certain amount of lime milk into the reaction tank, reacting with a ferric trichloride solution, flocculating and precipitating, then precipitating calcium and magnesium ions in a precipitation form, feeding the obtained mixed solution into a softening membrane system for solid-liquid separation, softening and removing hardness, and removing partial organic matters in the wastewater, wherein the hardness content in the treated water is less than 180 mg/L.
3. The method of claim 1, wherein in step three, the heat source of the combustion system is landfill gas.
4. The method according to claim 1, wherein the advanced oxidation system comprises an acidic filter tank, an alkaline filter tank, an ozone oxidation tank and a disinfection tank, the acidic filter tank is connected with the alkaline filter tank, the alkaline filter gear tank is connected with the ozone oxidation tank, the output end of the ozone oxidation tank is connected with the disinfection tank, the disinfection tank is connected with a clean water tank, and an ultraviolet disinfection device is arranged in the disinfection tank.
5. The method as claimed in claim 1, wherein a multi-stage filtration treatment is further included between the first step and the second step, so as to further reduce the impurity content in the leachate pretreated in the first step and prevent the clogging of the DTRO membrane.
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| CN202111032697.7A CN113896368A (en) | 2021-09-03 | 2021-09-03 | Full-quantitative treatment method for leachate of refuse landfill |
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| CN202111032697.7A CN113896368A (en) | 2021-09-03 | 2021-09-03 | Full-quantitative treatment method for leachate of refuse landfill |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116730553A (en) * | 2023-07-14 | 2023-09-12 | 江苏晟翔智能环保科技有限公司 | Landfill leachate collecting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116730553A (en) * | 2023-07-14 | 2023-09-12 | 江苏晟翔智能环保科技有限公司 | Landfill leachate collecting device |
| CN116730553B (en) * | 2023-07-14 | 2024-04-02 | 江苏晟翔智能环保科技有限公司 | Landfill leachate collecting device |
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