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Method for disposing refuse leachate of domestic refuse landfill

A technology for landfill leachate and domestic waste, applied in the field of high-concentration organic wastewater treatment, can solve the problems of difficult leachate treatment, achieve long-term stable and reliable treatment effects, good effluent quality, and high cost performance

Active Publication Date: 2006-05-03
BEIJING TDR ENVIRON TECH CO LTD
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Problems solved by technology

The treatment of leachate is very difficult, and it is difficult to meet the current national emission standards by conventional treatment methods.

Method used

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Embodiment Construction

[0013] The method for processing the landfill leachate of domestic waste of the present invention, its steps comprise:

[0014] 1. Use pre-aeration to reduce the conductivity and acid-base buffering degree of leachate. The leachate in the aeration tank is filled with air through the aerator, and some volatile organic compounds such as hydrogen sulfide, ammonia, mercaptan, volatile fatty acids (such as butyric acid, acetic acid, etc.) escape from the leachate due to the floating of the air. out, thereby reducing the conductivity and reducing the load for the subsequent disc-type reverse osmosis system; while the escape of a large amount of acidic volatile organic compounds increases the pH value of the leachate, and HCO, which plays an important role in the acid-base buffering degree 3 - ions, gradually transforming into CO 3 2- Combined with the precipitation of heavy metal ions, the acid-base buffering degree of the leachate is reduced.

[0015] The pre-aeration of the pr...

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Abstract

The treatment method for garbage percolate in domestic garbage landfill comprises: using pre-aeration for two hours every four hours to decrease liquid conductivity and acid-base buffer degree for nine days, discharging the treated liquid into middle pond; pumping the liquid into disk-pipe reverse osmosis system to intercept most polluted material in liquid and infiltrate water by pressure. This method has long-time stable effect, and the discharges water achieves first discharge limit in national standard.

Description

technical field [0001] The method relates to a treatment method for high-concentration organic waste water, in particular to a method for treating landfill leachate in domestic waste landfills by using pre-aeration and disc reverse osmosis technology. Background technique [0002] The landfill leachate of domestic waste is the high-concentration organic sewage produced during the landfill process, mainly from precipitation, organic matter degradation and the internal water of the waste itself. It has been determined that it contains 93 kinds of harmful substances, of which 22 are It has been included in the key control list of my country and the US National Environmental Protection Agency, one of which can directly cause cancer, and five can induce cancer. In addition, the leachate also contains a large amount of heavy metal ions, bacteria, viruses, etc. Calculated by its pollution load, the contribution of one ton of leachate to the environment is equivalent to 100-200 tons ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F7/00C02F1/44
CPCY02W10/10
Inventor 韩德民齐小力王晶
Owner BEIJING TDR ENVIRON TECH CO LTD
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