Electrochemical method for processing garbage percolate concentrated solution

Abstract

The invention discloses an electrochemical method for processing garbage percolate concentrated solution. The electrochemical method includes adjusting pH value of the garbage percolate concentrated solution to 2-4, conducting primary electrochemical processing on the garbage percolate concentrated solution by utilizing a high voltage pulse power supply and an alloy electrode, then adding an oxidation accelerator and a catalyst for further conducting fenton reaction, utilizing the high voltage pulse power supply and an advanced oxidation electro catalysis electrode to conduct secondary electrochemical processing, namely the anode electro catalysis oxidation reaction and the cathode electro catalysis reduction reaction, on supernate till the ratio of BOD5 / CODcr of the supernate is larger than or equal to 0.35 to obtain modified garbage percolate concentrated solution capable of conducting aerobic biochemical degradation. The electrochemical method conducts non-selective oxidation degradation and reduction modification on different organic molecules with different structures in the concentrated solution, effectively eliminates biotoxicity of the concentrated solution, reduces salt content, reduces pollutant density and accordingly lays foundation for standardized discharge of processed garbage percolate concentrated solution.

Description

technical field

[0001] The invention relates to the technical field of treating landfill leachate concentrate, in particular to an electrochemical method for treating landfill leachate concentrate. Background technique

[0002] Landfill leachate concentrates with high salt content, toxicity, and biochemical difficulty have become the difficulty and focus of sewage treatment in my country. The national environmental protection standard HJ564-2010 "Technical Specifications for Leachate Treatment Engineering of Domestic Garbage Landfill Sites (Trial)" clearly requires that "the concentrate produced by the landfill leachate through nanofiltration and reverse osmosis processes should be treated separately, and can be incinerated, evaporated or other appropriate treatment."

[0003] However, due to the high cost of incineration and evaporation treatment, the evaporation cost per ton of concentrated liquid is about 200 yuan, and the cost of incineration per ton of concentrated liq...

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