Treatment equipment and treatment process for membrane concentrated solution of landfill leachate

Abstract

The invention discloses treatment equipment for a membrane concentrated solution of landfill leachate. The treatment equipment comprises a pretreatment tank, a first pH regulating tank, an ultravioletcatalytic oxidation device, a second pH regulating tank, a sedimentation tank, a denitrification reaction tank, a nitration reaction tank, an MBR reaction tank and a plate-and-frame filter press. According to the process of the treatment equipment, a traditional treatment technology for membrane concentrated solutions and nanofiltration membrane concentrated solutions of landfill leachate is optimized; the technical problems of high operation cost of an advanced oxidation method and limited treatment effect of a biological treatment method are solved; and the advanced oxidation process of theultraviolet catalytic oxidation device is combined with the biological treatment process of the nitration reaction tank, the denitrification reaction tank and the MBR reaction tank to treat the membrane concentrated solution of the landfill leachate, so the stable and up-to-standard discharge of the membrane concentrated solution of the landfill leachate is ensured, and cost is effectively reduced.

Description

technical field [0001] The invention relates to the technical field of environmental engineering, in particular to equipment and a process for treating landfill leachate membrane concentrate. Background technique [0002] Nowadays, most domestic landfill plants use the process combination of "biological method + membrane separation technology" to treat landfill leachate membrane concentrate, but they still face the big problem of membrane concentrate treatment. The membrane concentrate of landfill leachate has complex components, high concentration of pollutants, and poor biodegradability. It is easy to cause secondary pollution when it is recharged to landfill. With the increase in the number of times the concentrate is refilled to the landfill, the concentration of refractory persistent organic pollutants, heavy metals, and salt in the leachate is getting higher and higher, resulting in a smaller and smaller membrane flux in the membrane treatment process. The consumption...

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Problems solved by technology

[0006] However, due to the high operating cost of the advanced oxidation method, low-cost biological treatment methods are generally used for treatment. However, high-concentration wastewater such as garbage concentrates contains refractory macromolecular organic substances, but the current single biological treatment method cannot meet the requirements of concentrated liquids. emission standards

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