CN113443794A - Landfill leachate treatment system - Google Patents
Landfill leachate treatment system Download PDFInfo
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- CN113443794A CN113443794A CN202110919444.5A CN202110919444A CN113443794A CN 113443794 A CN113443794 A CN 113443794A CN 202110919444 A CN202110919444 A CN 202110919444A CN 113443794 A CN113443794 A CN 113443794A
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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
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
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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
- C02F1/52—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
- C02F1/5254—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using magnesium compounds and phosphoric acid for removing ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
- C02F1/46—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
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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 Sorption (AREA)
Abstract
The invention relates to a landfill leachate treatment system, which is sequentially provided with a zeolite tank, an ammoniation tank, an ultrafiltration tank, an iron-carbon tank, a sedimentation tank and an evaporation tank, wherein a water outlet of the zeolite tank is connected with the ammoniation tank, the ammoniation tank is connected with the ultrafiltration tank, a concentrated solution of the ultrafiltration tank is conveyed to a Fenton tank, and the Fenton tank is communicated with a biochemical tank; and the ultrafiltration permeating liquid is conveyed to the iron-carbon pool, and the effluent of the iron-carbon pool is conveyed to a sedimentation tank. Landfill leachate processing system still is provided with broken wall pond, micro-filtration pond, add in the broken wall pond and gather phosphorus mud and carry out the broken wall and handle, broken wall pond effluent carry extremely the micro-filtration pond, the micro-filtration pond effluent is carried to the sedimentation tank, the sedimentation tank still is provided with the subsides agent entry, the sedimentation tank effluent is carried and is carried to the evaporation pond and carry out evaporation treatment. The garbage leachate treatment system can improve the biochemical treatment efficiency.
Description
Technical Field
The invention belongs to the field of wastewater treatment, and particularly relates to a landfill leachate treatment system.
Background
The landfill leachate is high-concentration organic wastewater, has high salt content, high COD concentration, high ammonia nitrogen content, complex components, serious imbalance of microorganism nutrient element proportion, difficult degradation and poor biodegradability, and belongs to wastewater which is difficult to treat. Aiming at the characteristics of high COD, ammonia nitrogen and salt content in landfill leachate and fermentation biogas slurry, the domestic current treatment process method for the wastewater mainly comprises the following steps: coagulating sedimentation, membrane method desalting, stripping deamination, evaporative crystallization, biochemical treatment and the like.
CN104787982B discloses a method for treating landfill leachate, which discloses using an anaerobic tank to ammoniate organic nitrogen, then sequentially entering a nitrification tank to perform degradation of organic matters and nitrification of ammonia, and then performing ultrafiltration, electrodialysis, etc. in the scheme, part of landfill leachate is mixed with nitrification section sludge and electrodialysis concentrated solution, and high nitrate nitrogen contained in the concentrated solution is used to oxidize organic pollutants and ammonia nitrogen under supercritical water condition.
However, in the prior art, organic nitrogen is usually subjected to ammoniation treatment and then oxidized to form nitrate, so that not only is waste but also system energy consumption is increased, and the problem of how to fully utilize the nitrogen source in wastewater and reduce energy consumption needs to be solved urgently.
Disclosure of Invention
The invention aims to provide a landfill leachate treatment system to improve the biochemical treatment efficiency.
In order to solve the technical problem, the invention discloses a landfill leachate treatment system which is sequentially provided with a zeolite tank, an ammoniation tank, an ultrafiltration tank, an iron-carbon tank, a sedimentation tank and an evaporation tank, wherein a water outlet of the zeolite tank is connected with the ammoniation tank, the ammoniation tank is connected with the ultrafiltration tank, a concentrated solution of the ultrafiltration tank is conveyed to a Fenton tank, and the Fenton tank is communicated with a biochemical tank;
the ultrafiltration permeate is conveyed to the iron-carbon pool, and the effluent of the iron-carbon pool is conveyed to a sedimentation pool; still be provided with broken wall pond, micro-filtration pond, add in the broken wall pond and gather phosphorus sludge and carry out the broken wall and handle, broken wall pond goes out water and carries extremely the micro-filtration pond, micro-filtration pond goes out water and carries to the sedimentation tank, the sedimentation tank still is provided with the settling agent entry, the sedimentation tank goes out water and carries to the evaporation tank and carry out the evaporation treatment.
Further, the zeolite adsorbing ammonia nitrogen in the zeolite tank is conveyed to a regeneration tank for regeneration treatment, and ammonia nitrogen effluent generated by the regeneration treatment is conveyed to the iron-carbon tank;
further, the iron-carbon filler in the iron-carbon pool contains a magnesium source; the magnesium source is simple substance magnesium.
Further, the settling agent is a magnesium-containing solution, and the magnesium-containing solution is one or more of a magnesium chloride solution, seawater, bittern or ash solution.
Further, the magnesium source is the magnesium-containing solution.
Further, the ammoniation tank contains ammoniated bacteria.
Further, the ammonifying bacteria are Agrobacterium strains.
Further, the preservation number of the agrobacterium strain is CGMCC No. 2962; the strain LAD9 is derived, separated and has physical and chemical characteristics as follows: agrobacterium having heterotrophic nitrification-aerobic denitrification properties and its use in the treatment of nitrogen-containing wastewater (CN 101570738A).
Further, the biochemical tank is one or a combination of more of an anaerobic tank, an anoxic tank, an aerobic tank and a membrane tank.
Furthermore, a pretreatment device is arranged in front of the zeolite pool. The pretreatment device is one or more of a grating, a stabilization tank and a neutralization tank.
The garbage leachate treatment system has the advantages that:
1. the zeolite tank is used for treating the percolate, so that ammonia nitrogen in the percolate can be directly adsorbed, ammonia nitrogen in an ammoniation tank process is reduced, and the biochemical treatment efficiency is improved;
2. setting an ammoniation tank to ammoniate organic nitrogen in the percolate, performing ultrafiltration treatment on the effluent of the ammoniation tank, allowing ammonia nitrogen to enter permeate liquid, and allowing other macromolecular organic substances remaining in concentrated solution to enter a Fenton reaction tank for reaction and degradation into micromolecular organic substances for treatment in a biochemical tank;
3. the ultrafiltration permeate and the ammonia nitrogen effluent generated by the regeneration tank are jointly conveyed to an iron-carbon tank for iron-carbon micro-electrolysis, and a magnesium source is provided to enter ammonia nitrogen wastewater while organic matters in the water are degraded;
4. in the biochemical treatment process, after wall-breaking microfiltration treatment is carried out on the generated phosphorus-accumulating sludge, water containing phosphate radicals is conveyed to a sedimentation tank to be mixed with wastewater in an iron-carbon pool to form sediment, and nitrogen, phosphorus and magnesium in the wastewater are separated to form struvite, so that effective recovery of nitrogen and phosphorus is realized.
Drawings
FIG. 1 is a schematic view of a landfill leachate treatment system;
fig. 2 is a schematic view of an embodiment of a landfill leachate treatment system.
Detailed Description
The present invention is further described in detail below with reference to examples so that those skilled in the art can practice the invention with reference to the description.
It will be understood that terms such as "having," "including," and "comprising," when used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
According to the landfill leachate treatment system provided by the embodiment of the invention, the zeolite tank, the ammoniation tank, the ultrafiltration tank, the iron-carbon tank, the sedimentation tank and the evaporation tank are sequentially arranged. The water outlet of the zeolite tank is connected with the ammoniation tank, the ammoniation tank is connected with the ultrafiltration tank, the concentrated solution of the ultrafiltration tank is conveyed to the Fenton tank, and the Fenton tank is communicated with the biochemical tank. The ultrafiltration permeate is conveyed to the iron-carbon pool, and the effluent of the iron-carbon pool is conveyed to a sedimentation pool; still be provided with broken wall pond, micro-filtration pond, add in the broken wall pond and gather phosphorus sludge and carry out the broken wall and handle, broken wall pond goes out water and carries extremely the micro-filtration pond, micro-filtration pond goes out water and carries to the sedimentation tank, the sedimentation tank still is provided with the settling agent entry, the sedimentation tank goes out water and carries to the evaporation tank and carry out the evaporation treatment.
Further, the zeolite adsorbing ammonia nitrogen in the zeolite tank is conveyed to a regeneration tank for regeneration treatment, and ammonia nitrogen effluent generated by the regeneration treatment is conveyed to the iron-carbon tank.
Further, the iron-carbon filler in the iron-carbon pool contains a magnesium source; the magnesium source is simple substance magnesium.
Further, the settling agent is a magnesium-containing solution, and the magnesium-containing solution is one or more of a magnesium chloride solution, seawater, bittern or ash solution.
Further, the magnesium source is the magnesium-containing solution. The ammoniation tank contains ammoniated bacteria. In one embodiment, the ammoniating bacteria is an agrobacterium strain.
Further, the preservation number of the agrobacterium strain is CGMCC No. 2962; the strain LAD9 is derived, separated and has physical and chemical characteristics as follows: agrobacterium having heterotrophic nitrification-aerobic denitrification properties and its use in the treatment of nitrogen-containing wastewater (CN 101570738A).
Further, the biochemical tank is one or a combination of more of an anaerobic tank, an anoxic tank, an aerobic tank and a membrane tank.
Furthermore, a pretreatment device is arranged in front of the zeolite pool. The pretreatment device is one or more of a grating, a stabilization tank and a neutralization tank.
Example 1
The garbage percolate is the garbage percolate stacked by a certain garbage incineration power plant, CODcr19800 mg/L; NH 3-N1122 mg/L; organic nitrogen 1329 mg/L.
Conveying the pretreated landfill leachate into a zeolite tank for ammonia nitrogen adsorption treatment, wherein the concentration of ammonia nitrogen in effluent is 238mg/L and 974mg/L of organic nitrogen, then, treating the effluent in an ammoniation tank, ammoniating organic nitrogen substances in the wastewater, performing ultrafiltration treatment on the ammoniated wastewater, conveying the ultrafiltration permeate and ammonia nitrogen effluent generated by regeneration treatment to an iron-carbon tank for treatment, conveying the iron-carbon effluent to a sedimentation tank, adding a magnesium source and a product of phosphorus-accumulating sludge into the sedimentation tank to form struvite, recovering nitrogen and phosphorus elements, wherein the nitrogen recovery rate is about 56%, and the phosphorus recovery rate is 39%; and conveying the ultrafiltration concentrated solution to a Fenton tank for treatment and then entering a biochemical tank for treatment. The CODcr of the final effluent is 23mg/L, NH 3-N12 mg/L; the organic nitrogen is 6 mg/L.
Example 2
The garbage percolate adopts a garbage incineration power plant to stack garbage percolate CODcr23495 mg/L; NH 3-N963 mg/L; organic nitrogen 1129 mg/L.
Conveying the pretreated landfill leachate to a zeolite tank for ammonia nitrogen adsorption treatment, wherein the concentration of ammonia nitrogen in effluent is 179mg/L and 910mg/L of organic nitrogen, then, treating the effluent in an ammoniation tank, ammoniating organic nitrogen substances in the wastewater, performing ultrafiltration treatment on the ammoniated wastewater, conveying the ultrafiltration permeate and ammonia nitrogen effluent generated by regeneration treatment to an iron-carbon tank for treatment, conveying the iron-carbon effluent to a sedimentation tank, adding a magnesium source and a product of phosphorus-accumulating sludge in the sedimentation tank to form struvite, recovering nitrogen and phosphorus elements, wherein the nitrogen recovery rate is about 61%, and the phosphorus recovery rate is 42%; and conveying the ultrafiltration concentrated solution to a Fenton tank for treatment and then entering a biochemical tank for treatment. The CODcr of the final effluent is 31mg/L, NH 3-N14 mg/L; organic nitrogen 9 mg/L.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable to various fields of endeavor for which the invention may be embodied with additional modifications as would be readily apparent to those skilled in the art, and the invention is therefore not limited to the details given herein and to the embodiments shown and described without departing from the generic concept as defined by the claims and their equivalents.
Claims (10)
1. A landfill leachate treatment system is characterized in that the landfill leachate treatment system is sequentially provided with a zeolite tank, an ammoniation tank, ultrafiltration, an iron-carbon tank, a sedimentation tank and an evaporation tank, wherein a water outlet of the zeolite tank is connected with the ammoniation tank, the ammoniation tank is connected with ultrafiltration, a concentrated solution of the ultrafiltration tank is conveyed to a Fenton tank, and the Fenton tank is communicated with a biochemical tank;
the ultrafiltration permeate is conveyed to the iron-carbon pool, and the effluent of the iron-carbon pool is conveyed to a sedimentation pool; landfill leachate processing system still is provided with broken wall pond, micro-filtration pond, add in the broken wall pond and gather phosphorus sludge and carry out the broken wall and handle, broken wall pond effluent carry extremely the micro-filtration pond, the micro-filtration pond effluent is carried to the sedimentation tank, the sedimentation tank still is provided with the subsides agent entry, the sedimentation tank effluent is carried and is carried to the evaporation tank and carry out evaporation treatment.
2. The landfill leachate treatment system of claim 1, wherein the zeolite in the zeolite tank after adsorbing ammonia nitrogen is conveyed to a regeneration tank for regeneration treatment, and ammonia nitrogen effluent generated by the regeneration treatment is conveyed to the iron-carbon tank.
3. The landfill leachate treatment system of claim 1, wherein the iron-carbon filler in the iron-carbon basin contains a source of magnesium.
4. The landfill leachate treatment system of claim 3, wherein the source of magnesium is elemental magnesium.
5. The landfill leachate treatment system of claim 1, wherein the settling agent is a magnesium-containing solution, and the magnesium-containing solution is one or more of a magnesium chloride solution, seawater, bittern or ash solution.
6. The landfill leachate treatment system of claim 5, wherein said source of magnesium is said magnesium-containing solution.
7. The landfill leachate treatment system of claim 1, wherein the ammoniation tank contains ammoniated bacteria.
8. The landfill leachate treatment system of claim 7, wherein said ammoniated bacteria are Agrobacterium strains; the preservation number of the agrobacterium strain is CGMCC No. 2962.
9. The landfill leachate treatment system of claim 1, wherein the biochemical tank is one or more of an anaerobic tank, an anoxic tank, an aerobic tank, and a membrane tank.
10. The landfill leachate treatment system of claim 1, wherein a pretreatment device is further disposed in front of the zeolite tank; and the pretreatment device is one or more of a grating, a stabilization tank and a neutralization tank.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114436481A (en) * | 2022-04-02 | 2022-05-06 | 山东凤鸣桓宇环保有限公司 | Resource recovery process for phosphating wastewater |
| CN114477665A (en) * | 2022-04-14 | 2022-05-13 | 山东凤鸣桓宇环保有限公司 | Coating wastewater recycling treatment process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114436481A (en) * | 2022-04-02 | 2022-05-06 | 山东凤鸣桓宇环保有限公司 | Resource recovery process for phosphating wastewater |
| CN114477665A (en) * | 2022-04-14 | 2022-05-13 | 山东凤鸣桓宇环保有限公司 | Coating wastewater recycling treatment process |
| CN114477665B (en) * | 2022-04-14 | 2022-07-22 | 山东凤鸣桓宇环保有限公司 | Coating wastewater recycling treatment process |
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