Greenhouse Gases Emission Factors and it's Reduction Measures in Sewage Treatment Plant

Abstract

 The emission factors and reduction measure of greenhouse gases (GHGs) in sewage treatment plant were assessed based on the calculation of LCCO₂ and the measurement of CH₄ and N₂O. A total of 3 different typical types of sewage treatment system were investigated at each season for over a year, and the emission amount of GHGs and GHGs emission factor for each plant were identified. The three main sources for GHGs were the electric consumption, nitrous oxide from sludge incineration process and on-site methane production. The on-site methane emission was found in aeration tank and was depended on the season and water temperature. The nitrous oxide emission was depended on not only the temperature but also the treatment system. Based on the results of this study, GHGs reduction measures from sewage treatment plant was suggested.