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Composite permeable reactive barrier and in-situ treatment method thereof

A permeable reactive wall and composite technology, applied in chemical instruments and methods, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the difficulty of centralized collection and treatment of leachate in informal landfills, Pollution of surface water, groundwater and soil, etc., achieving significant decolorization effect, simple construction, saving energy consumption and operating costs

Inactive Publication Date: 2011-05-25
TSINGHUA UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to provide a composite permeable reaction wall for leachate in informal landfills and its in-situ treatment method, which is used to solve the difficulty of centralized collection and treatment of leachate in existing informal landfills, which seriously pollutes surface water , groundwater and soil issues

Method used

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  • Composite permeable reactive barrier and in-situ treatment method thereof

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Embodiment 1

[0019] The structure of the reaction wall is as figure 1 As shown, the cuboid wall body whose length, width, and height are 2m, 1m, and 1m respectively is quartz sand layer, iron powder mixed filler layer, zeolite mixed filler layer, activated carbon mixed filler layer and quartz sand layer according to the direction of water flow. The rooms are separated by permeable geotextiles, and the cuboid walls are fixed with steel wire mesh.

[0020] Arranging the reaction wall perpendicular to the direction of leachate flow includes the following steps:

[0021] (1) Mix 0-0.25mm iron powder, 0.5-2mm zeolite and 0.5-1mm activated carbon with 0.5-1mm quartz sand as the active material, and mix iron powder, zeolite and activated carbon at a volume ratio of 3:2 filler.

[0022] (2) Build a 2m long and 1m wide rectangular leachate collection well perpendicular to the leachate direction downstream of the landfill, and place steel wire mesh with length, width, and height of 2m, 1m, and 1m ...

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Abstract

The invention discloses an irregular landfill site leachate composite permeable reactive barrier and an in-situ treatment method thereof in the technical field of domestic garbage treatment of environmental protection. Active iron powder material, zeolite and active carbon are added into a barrier body; and when the leachate flows through the barrier body under the action of personal hydraulic gradient, the leachate and the barrier body fully undergo physical and chemical reaction, then most organic pollutants, ammonia nitrogen, heavy metals and colored substances in the leachate are removed, and the treated leachate is discharged after reaching the standards. The method is simple in construction, flexible in arrangement, low in running and maintenance expense and strong in impact load resistance, is economic and energy-saving, and has high practical value.

Description

technical field [0001] The invention belongs to the technical field of domestic waste treatment for environmental protection, and in particular relates to a compound type permeable reaction wall for leachate of an informal landfill and an in-situ treatment method thereof. Background technique [0002] Until now, landfill treatment has always been an important method of domestic waste disposal in my country. Due to the increasing amount of domestic waste, the lack of technology and funds, and the delay in formulating landfill construction and operation management standards and specifications, a large number of informal Landfills appear. Since informal landfills are filled using natural geographical conditions, there is no perfect landfill gas collection system, leachate drainage system, anti-seepage system and covering layer, so that the amount of leachate production and water quality change with the seasons The landfill gas and leachate have complex components and high conce...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04
Inventor 刘建国薛玉伟岳东北
Owner TSINGHUA UNIV
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