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A treatment method for leachate of a waste incineration power plant

A landfill leachate and waste incineration technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem that leachate concentrate is difficult to handle, affects biochemical systems, and membrane life Reduce and other problems, to achieve the effect of less investment in treatment equipment, high treatment efficiency, and water saving

Active Publication Date: 2018-01-26
CHENGDU CECEP RENEWABLE ENERGY CO LTD
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AI Technical Summary

Problems solved by technology

However, the use of membrane filtration technology has the problem that the leachate concentrate is difficult to deal with. The existing technology generally uses the back-spray incineration process, but this process has problems such as high energy consumption, salt enrichment affecting the biochemical system and reducing the life of the membrane.

Method used

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  • A treatment method for leachate of a waste incineration power plant
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  • A treatment method for leachate of a waste incineration power plant

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Embodiment Construction

[0023] The leachate indicators in different embodiments are different, and the parameters used in the treatment process are different. The main parameters to be changed include anaerobic tank circulation flow, evaporation temperature, and compressor frequency. The raw material refers to untreated landfill leachate from waste incineration power plants.

[0024] Technical scheme of the present invention comprises the following steps:

[0025] 1. Pretreatment: Collect the landfill leachate from the waste storage pit and enter the grit chamber and sedimentation tank for sedimentation to remove suspended impurities and sludge. The clarified landfill leachate enters the adjustment tank for 7 days for regulation and storage flow;

[0026] 2. Anaerobic UBF treatment: pump the landfill leachate from the regulating tank into the bottom of the composite anaerobic fluidized bed reactor, and make the sewage flow under the action of the circulating pump and the biogas generated in the react...

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Abstract

The invention discloses a treatment method for leachate of a waste incineration power plant. The treatment method includes pretreatment, anaerobic UBF treatment, nitrification-denitrification treatment, ultrafiltration treatment, and low-temperature distillation treatment steps. The method of the invention has a short process flow, High treatment efficiency, low energy consumption, realize high-concentration wastewater degradation COD, make 70,000 high-concentration COD after treatment, COD can reach less than 60, meet industrial reuse water standards, realize zero discharge of leachate, landfill leachate treated by this method The indicators of the effluent are much better than the discharge requirements of GB16889-2008 "Pollution Control Standards for Domestic Garbage Landfill Sites".

Description

technical field [0001] The invention relates to a wastewater treatment technology, in particular to a treatment method for landfill leachate. Background technique [0002] China has a large population. With the rapid development of urbanization, the amount of domestic waste is also increasing rapidly. Waste disposal has become a matter of great concern to local governments. Both landfill treatment technology and waste incineration treatment technology will produce landfill leachate. Landfill leachate from waste incineration power plants is different from landfill leachate, with higher content of organic matter and suspended matter. The treatment of landfill leachate is still an international problem. If the landfill leachate is not treated well and discharged without meeting the standard, it will cause secondary pollution. [0003] Domestic waste in China generally has high food waste content, high moisture content, high organic matter content, and low relative calorific va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
Inventor 杨为中李豫军苏志刚何拥孙晓龙
Owner CHENGDU CECEP RENEWABLE ENERGY CO LTD
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