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Advanced treatment method for garbage percolate

A landfill leachate and advanced treatment technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of low removal rate of ammonia nitrogen and total nitrogen, and achieve effluent water quality Stability, simple operation, and the effect of reducing the land area

Active Publication Date: 2008-08-20
WELLE ENVIRONMENTAL GRP CO LTD
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Problems solved by technology

Therefore, the current landfill leachate treatment methods mainly have low removal rates for ammonia nitrogen and total nitrogen in landfill leachate.

Method used

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  • Advanced treatment method for garbage percolate

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Embodiment Construction

[0019] See shown in Figure 1, the method for advanced treatment of landfill leachate of the present invention, carry out according to the following steps,

[0020] (1) Denitrification reaction: Put the landfill leachate in the denitrification tank, and continuously push the flow in the denitrification tank to perform denitrification reaction on the landfill leachate. In an anoxic environment, nitrate and nitrite pass through the anaerobic bacteria in the Under the action of the reflux concentrate of the ultrafilter and the carbon source in the landfill leachate, it is reduced to nitrogen and discharged to achieve the purpose of biological denitrification. The liquid level of the landfill leachate in the denitrification tank is ≥ 7 meters, and the landfill leachate stays for 10- After 18 hours, it flows into the nitrification tank by itself.

[0021] (2) Nitrification reaction: Garbage leachate flows from the denitrification tank to the nitrification tank, continuous jet flow a...

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Abstract

The invention relates to a deep treatment method of garbage leachate, which is characterized in that (1) the garbage leachate, positioned in a denitrification pool, is made to have denitrification reaction by continuous push flow; (2) then the garbage leachate in the denitrification pool flowing into a nitrification pool is made to have nitrification reaction by continuous jet and blast aeration; DO is controlled from three to five mg / L; (3) the nitrified garbage leachate, flowing into a denitrification pool positioned behind, is made to have denitrification reaction by continuous push flow and the addition of carbon source; the concentration (mg / L) ratio of the carbon source and nitrate nitrogen ranges from two point zero to one, to four point five to one; (4) the wastewater after denitrification in the denitrification pool positioned behind is transported into a tubular ultrafilter; then the solid and the liquid of the wastewater are separated by the membrane component of the ultrafilter; clear liquid is transported to a nanofiltration device; concentrated liquid reflows into the denitrification pool; (5) the clear liquid after ultrafiltration is transported to a nanofiltration device; clear water is exported after the clear liquid is filtered by the membrane component of the nanofitration device. The deep treatment method of garbage leachate has the advantages of increasing the removal rate of ammonia nitrogen and total nitrogen.

Description

technical field [0001] The invention relates to a method for advanced treatment of landfill leachate, belonging to the technical field of sewage treatment. Background technique [0002] Landfill leachate is a kind of high-concentration organic wastewater with complex components, which has the typical characteristics of high pollution load and comprehensive pollution: stench; darker color, chromaticity as high as 2000-4000 times; pH about 6-8; COD concentration about 6000- 80000mg / L; biodegradability is very poor, stabilized landfill leachate BOD 5 / COD is generally 0.01~0.1; the concentration of ammonia nitrogen NH3-N is relatively high, about 200~3000mg / L; it also contains a large amount of dissolved solids, such as sodium, calcium, chloride, sulfate, etc., as well as a large amount of cadmium, nickel, zinc, Heavy metals such as copper, chromium, and lead often have large fluctuations in physical and chemical properties. In addition to COD, BOD, NH3-N and other pollutants...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F3/30
Inventor 李月中朱卫兵浦燕新
Owner WELLE ENVIRONMENTAL GRP CO LTD
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