Electrochemical method for processing garbage percolate concentrated solution

A landfill leachate, electrochemical technology, applied in chemical instruments and methods, electrochemical water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of pollutant accumulation and high cost, and reduce the concentration of pollutants. , The effect of reducing salt content and eliminating biological toxicity

Active Publication Date: 2014-04-16
中钢集团武汉安全环保研究院有限公司 +1
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the high cost and the accumulation of pollutants in the existing technology of treating landfill leachate concentrate, and provide an electrochemical method for treating landfill leachate concentrate with high efficiency, environmental protection and good economical efficiency

Method used

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  • Electrochemical method for processing garbage percolate concentrated solution

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Embodiment 1

[0034] Such as figure 1 As shown, the present embodiment provides an electrochemical method for treating landfill leachate concentrate, and the steps are as follows:

[0035] a) The leachate concentrate enters the regulating tank, adds sulfuric acid to adjust the pH value to 3, and pumps it into the pulse electrochemical catalytic tank;

[0036] b) Add H to the effluent after the pulse electrochemical catalytic tank reaction 2 o 2 and MnO 2 Finally, go to the aeration tank for aeration-Fenton reaction. The effluent after the reaction in the aeration tank enters the first-stage sedimentation tank for precipitation to obtain the supernatant. The first-stage sedimentation tank is composed of three sedimentation tanks of the same specification in series;

[0037] c) The supernatant after settling in the primary sedimentation tank is pumped into the electrocatalytic oxidation tank for advanced oxidation degradation, which greatly improves the biodegradability of the sewage and m...

Embodiment 2

[0042] Such as figure 1 Shown, a kind of electrochemical method for processing landfill leachate concentrate, its steps are as follows:

[0043] a) The leachate concentrate enters the regulating tank, adds hydrochloric acid to adjust the pH value to 3.5, and pumps it into the pulse electrochemical catalytic tank;

[0044] b) Adding Fe to the effluent after the pulse electrochemical catalytic tank reaction 2+ +H 2 o 2 and MnO 2 Finally, go to the aeration tank for aeration-Fenton reaction. The effluent after the reaction in the aeration tank enters the first-stage sedimentation tank for precipitation to obtain the supernatant. The first-stage sedimentation tank is composed of two sedimentation tanks of the same specification in series;

[0045] c) The supernatant after settling in the primary sedimentation tank is pumped into the electrocatalytic oxidation tank for advanced oxidation degradation, which greatly improves the biodegradability of the sewage and makes the BOD of...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/46
Inventor 徐国平熊昌贵张怀松涂晓波张智良袁兵李闪程木森李健肖洁
Owner 中钢集团武汉安全环保研究院有限公司
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