Method for anaerobic preparation of methane from landfill leachate

Abstract

The invention discloses a method for anaerobic preparation of methane from landfill leachate, and belongs to the field of methane preparation methods. The method comprises the steps of influent concentration control over the landfill leachate, inoculation of anaerobic sludge in an anaerobic baffled reactor, addition of ferroferric oxide, comprehensive management and control over relevant parameters and hydraulic retention time in the anaerobic baffled reactor, detection of the relevant parameters in the anaerobic baffled reactor, and determination of the total gas production and the methane proportion in the anaerobic baffled reactor. According to the method, the direct electronic transfer process between conductive bacteria and methanogenic bacteria in the anaerobic sludge is driven through the interaction between ferroferric oxide conductive materials and microorganisms in the anaerobic sludge, the anaerobic preparation of the methane from the landfill leachate is strengthened, and efficient anaerobic treatment and effective degradation of high molecular refractory organics in the landfill leachate are achieved.

Description

technical field [0001] The invention relates to the field of methane preparation methods, in particular to a method for anaerobically preparing methane from landfill leachate. Background technique [0002] Landfill leachate is a high-concentration organic wastewater produced during the stacking and landfilling of municipal solid waste due to microbial action, rainwater flushing, and long-term soaking of surface water and groundwater. Its complex composition, high concentration of pollutants, large chroma, and strong toxicity are currently recognized problems in the water treatment industry. If not handled properly, it will not only pollute surface water, but also endanger ground water. [0003] The traditional physical and chemical treatment of landfill leachate has high operating costs, and the quality of effluent water is gradually difficult to meet the increasing discharge standards. Compared with physical and chemical methods, biological treatment is currently used mor...

AI Technical Summary

Problems solved by technology

It is difficult to achieve effective treatment of landfill leachate solely by anaerobic biological treatment, but as a conductive material, ferroferric oxide can interact with microorganisms to accelerate the hydrolysis and acidification process of macromolecular organic matter through direct electron transfer, thereby stimulating the production of methane

At home and abroad, the use of ferric oxide to promote simple organics such as propionic acid, butyric acid and ethanol has achieved good results, but the use of ferric oxide to promote complex organic wastewater such as landfill leachate is still blank.

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