Methodology for Mitigation of LFGs Emission & Pollution caused by Leachate - A Literature Review

摘要

The MSW which is formed from the household which are generally scrapped or dumped at a place which is called landfill site. Generally, the waste that is to be disposed shall be segregated and should be given primary treatment before disposal. But the practice is not carried out. When the water which comes in contact with landfill-wastes, the landfill gases (LFG) is formed as an organic part of municipal solid waste which is biodegraded. LFGs emitted consist of CH4, CO2 and are Greenhouse gases (GHGs) which endow in adverse climatic change. In India, conventional methods (clay capping) which are still implemented to decrease water penetration in landfills. Another method for reduction of landfill gases is Extraction systems for collecting gas from landfill. Also, Phytocapping method is application of plants on aged landfill sites and decrease the emission of GHGs and leachate. Moreover, Leachate is the concentrated liquid that is gathered in bottom of landfill which threats degradation of groundwater and natural water body through runoff. This paper focuses on the issues of LFGs and Leachate and methods practiced to capture LFGs to convert to bioenergy thereby mitigate the emission of GHGs and leachate to decrease further degradation of environment..