EFFECTS OF THE DIFFERENCE IN SEWAGE SLUDGE FUEL UTILIZATION AND HEAT SOURCE FOR DRYING SEWAGE SLUDGE ON GREENHOUSE GAS EMISSIONS REDUCTION IN ENERGY RECOVERY BY COLLABORATION OF ENVIRONMENTAL INFRASTRUCTURES

Abstract

 In this study, GHG reduction effects of energy recovery systems were evaluated in consideration of sewage sludge fuel utilization, heat source for drying, and collaboration of environmental infrastructures, as a case study in Kitakyushu city. In different five cases, combination of dewatered sludge disposal, and utilization of digested gas and combustion heat of municipal waste. As a result, it was revealed that case2 brought about the greatest GHG reduction effect, 38% less than base case (case0). This means the advantage in energy recovery by collaboration of neighboring environmental infrastructures and industrial factories.