Treatment method for municipal domestic waste penetrating fluid

Abstract

The invention discloses a treatment method for municipal domestic waste penetrating fluid. The method is integrated and developed through techniques of pretreatment devices, anaerobic reactors, membrane bioreactors, electro-catalysis membrane reactors and the like aiming at the proprieties that the waste penetrating fluid is high in organic substance concentration and degradation-resistant. The treatment method comprises the steps of carrying out pretreatment such as coagulating sedimentation on landfill leachate so as to remove colloids or oil, suspends and most heavy metals in the landfill leachate, introducing the landfill leachate into an anaerobic reactor, removing organic pollutants under the effect of anaerobic microorganisms, converting organic amine into inorganic amine, and carrying out anoxic de-digestion, aerobic digestion, ultrafiltration membrane separation and the like by virtue of an external membrane bioreactor, so as to effectively remove high-concentration ammonia nitrogen, COD, BOD, SS and the like; and carrying out electrochemical oxidation and reduction reaction by virtue of an electro-catalysis membrane reactor, so as to decompose organic matters into organicsmall molecules or CO2 and water, decompose ammonia nitrogen into nitrogen, reduce heavy metals for realizing further removal, so that effluent quality reaches national or industrial relevant standards, and the effluent can be discharged or reused.

Description

technical field [0001] The invention relates to a treatment method for municipal solid waste leachate, which belongs to the technical field of environmental engineering water treatment. technical background [0002] With the rapid development of urbanization, municipal solid waste has become a serious problem that plagues the further development of cities in our country. According to statistics, in 2014, the annual output of domestic waste in my country has exceeded 160 million tons, and it is increasing at a rate of 10% every year. It is estimated that by 2030, the annual output of domestic waste will exceed 400 million tons. At present, the urban waste disposal methods commonly used in the world include sanitary landfill, biochemical treatment, incineration, recycling and so on. More than 90% of urban waste in my country is disposed of by landfill, and the direct consequence of sanitary landfill is to produce a large amount of leachate. Landfill leachate, also known as l...

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Problems solved by technology

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a treatment method for municipal solid waste leachate, which solves the problems that organic pollutants are difficult to be effectively removed and the treatment is not thorough in the current landfill leachate treatment process, so that the treated landfill leachate can produce water The water quality has reached the relevant discharge standards in the "Water Quality Standards for Sewage Discharge into Urban Sewers" (CJ343-2010) and "Pollution Control Standards for Domestic Garbage Landfills" (GB 16889-2008), realizing harmless or zero waste permeate treatment emission

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