where by E2 denotes the removing of COD in wastewater made by CH4 transformed to carbon dioxide equal emissions each year, tCO2eq/a; Q denotes the once-a-year treatment of wastewater, m3/a; CODi denotes the COD of the https://socialmediainuk.com/story18170227/top-latest-five-effluent-treatment-plant-indore-urban-news