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Combined treatment process for urban garbage percolate

A technology for landfill leachate and treatment process, which is applied in the fields of water/sewage multi-stage treatment, oxidized water/sewage treatment, adsorbed water/sewage treatment, etc., which can solve the problems of difficult disposal of regenerated waste liquid and decrease of working exchange capacity.

Inactive Publication Date: 2011-05-04
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses the adsorption of organic matter by the anti-pollution resin as the main treatment method. Usually, the common ion exchange resin is used under high COD conditions, and the working exchange capacity drops sharply. more difficult to handle

Method used

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  • Combined treatment process for urban garbage percolate

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Effect test

Embodiment 1

[0011] The combined process disclosed by the invention is used to treat the leachate of middle-aged and old garbage, and the leachate is collected from a landfill in Beijing. First, the anaerobic process is used for treatment, and then the aerobic biochemical treatment is carried out by the aerobic membrane bioreactor. The biochemical effluent is treated by the coagulation sedimentation unit, the coagulation sediment effluent enters the photoelectric oxidation reaction unit, and the oxidation effluent passes through the adsorption / oxidation filtration unit. That is, the water can be discharged up to the standard. Among them, the landfill leachate is collected from a landfill, and the leachate belongs to middle-aged and old-age landfill leachate. Raw water COD Cr The concentration is 4000-7000mg / L, and the concentration of ammonia nitrogen is 1500-2000mg / L. The residence times of the anaerobic and aerobic reactors were 50 and 40 hours respectively. The coagulation and sedimen...

Embodiment 2

[0013] The leachate treatment process described in Example 1 was used. The landfill leachate is collected from a landfill in the south, and the leachate belongs to fresh leachate. Raw water COD Cr The concentration is 15000-20000mg / L, the ammonia nitrogen concentration is 1000-1500mg / L, and the total nitrogen concentration is 1200-1800mg / L. The residence time of the anaerobic and aerobic units is 70 and 55 hours respectively, and the coagulation and sedimentation unit uses industrial polyaluminum chloride as the coagulant, and the dosage of the coagulant is 500 mg / L; at the same time, the coagulant polyacrylamide ( 10mg / L). The photoelectric oxidation residence time is 0.5 hours, and the oxidation / adsorption unit adopts the materials disclosed in the patent (200910080596.x), and the dosage is 500mg / L. The residence time of the adsorption / oxidation unit was 0.5 hours. Final effluent COD Cr The concentration is 20-40mg / L, the ammonia nitrogen concentration is 2-8mg / L, the t...

Embodiment 3

[0015] The leachate treatment process described in Example 1 was used. The landfill leachate is collected from a landfill in the south, and the leachate belongs to fresh leachate. Raw water COD Cr The concentration is 15000-20000mg / L, the ammonia nitrogen concentration is 1000-1500mg / L, and the total nitrogen concentration is 1200-1800mg / L. The residence time of the anaerobic and aerobic units is 70 and 55 hours respectively, and the coagulation and sedimentation unit uses industrial polyaluminum chloride and polyferric chloride as coagulants, and the total dosage of coagulants is 500 mg / L; Coagulant polyacrylamide (10mg / L). The photoelectric oxidation residence time is 0.3 hours, and the oxidation / adsorption unit adopts the materials disclosed in the patent (200910080596.x), and the dosage is 400mg / L. The residence time of the adsorption / oxidation unit was 0.5 hours. Final effluent COD Cr The concentration is 15-35mg / L, the ammonia nitrogen concentration is 2-7mg / L, the ...

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Abstract

The invention relates to a combined treatment process for the membrane effluent concentrated solution of urban garbage percolate. In the treatment process, a coagulation sedimentation unit, a photoelectric oxidation unit and an oxidation adsorption filtration unit are provided, wherein the coagulation sedimentation unit removes macromolecular soluble substances from biochemical effluent; by using any one of or compounding two or more of polyaluminum chloride, poly-ferric chloride, aluminum sulfate and ferric sulfate, and adding polyacrylamide serving as a coagulant aid, the removal rate of chemical oxygen demand (COD) is about 30 percent; the photoelectric oxidation unit can effectively remove ammonia nitrogen, total nitrogen and part of nondegradable organic matters, the removal rate of the ammonia nitrogen and the total nitrogen can reach 99 percent after the percolate is treated by the photoelectric oxidation unit, and the concentration of residual COD is between 1,000 and 2,000mg / L; and the oxidation / adsorption unit removes residual organic components and metal ions and has been detailedly described in the patent (200910080596.x). The combined process has the characteristics of small investment, low operating cost and the like, is simply and flexibly operated, is suitable for the innocent treatment of the percolate, and also can be applied to the treatment of salty wastewater with high ammonia nitrogen and organic matter load and large water quality fluctuation.

Description

technical field [0001] The invention discloses a treatment method for effectively treating landfill leachate membrane filtration concentrate, belonging to the technical field of water treatment. Background technique [0002] Sanitary landfilling and composting of urban waste are currently widely used urban waste disposal methods in China. The leachate produced during the landfill and composting of garbage is a kind of high-concentration and difficult-to-treat organic wastewater with large changes in water quality and quantity, high ammonia nitrogen content, and complex components. With the improvement of national environmental protection requirements, some areas have gradually begun to implement new emission standard policies. The effluent requirements meet the requirements in Table 3 of GB 16889-2008 "National Standard of the People's Republic of China". Traditional biochemical treatment and coagulation sedimentation processes are difficult to meet the demand. Therefore,...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F3/30C02F1/52C02F1/28C02F1/72
Inventor 曲久辉赵旭刘会娟刘锐平兰华春
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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