Treatment methods of landfill leachate and treatment systems thereof

Abstract

The invention belongs to multiple-stage treatment methods of waste water and treatment systems thereof, and particularly discloses treatment methods of landfill leachate and treatment systems thereof. One of the treatment methods comprises the following steps of: firstly, mixing the landfill leachate and anaerobic sludge to perform complete reaction; secondly, performing electrochemical reaction to obtain flocs and initially depositing effluent water; finally, adjusting the pH value, adding Fenton reagents and mixing the effluent water and aerobic sludge after the complete reaction between the Fenton reagents and the leachate in a later phase. In the other method of the invention, the mixing and reaction between the leachate in the initial phase and the aerobic sludge are performed before the electrochemical reaction and other steps are the same. The invention also provides two different treatment systems for the two different treatment methods. The systems are formed by optimally combining a pre-treatment tank, an anaerobi reaction tank, an electrochemical reaction tank, a deposition tank, an oxidation tank, a regulating tank, a biochemical reaction tank and a sludge concentration tank. The treatment methods have the advantages of wide application range, small influence of environment, low operation cost, good treatment effect and the like.

Description

technical field [0001] The invention relates to a multistage treatment method and a treatment system for waste water, in particular to a multistage treatment method and a treatment system for waste water including biochemical treatment steps. Background technique [0002] With the increase of my country's urban population, the expansion of city scale and the improvement of residents' living standards, the output of urban domestic waste in my country is increasing sharply. By 1999, the annual output of domestic waste in my country had reached 1.4 billion tons, and it was increasing at an annual rate of 8% to 10%. The per capita daily waste production had exceeded 1Kg, approaching the level of industrially developed countries. According to the principle of "harmless, reduction, and recycling" of waste disposal in my country, a large number of domestic waste sanitary landfills will be newly built. Whether the landfill leachate can be treated up to the standard and discharged i...

AI Technical Summary

Problems solved by technology

[0010] At present, there is no better method for treating landfill leachate in my country. The commonly used methods for treating landfill leachate include biological method, Fenton oxidation method, electrochemical method, etc. If these methods are used alone to treat landfill leachate, or the effect is not good, Or the cost is too high, it is difficult to solve the problem of landfill leachate

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