EFFECT OF DIFFERENT HEAT SOURCE FOR SEWAGE SLUDGE FUELIZATION ON ENERGY RECOVERY

Abstract

 In this study, GHG reduction and business feasibility were evaluated in consideration of selecting a heat source for sewage sludge fuelization, as a case study in Kitakyushu city. Here, proposed 4 heat sources for drying sewage sludge were the followings: digestion gas (case1); waste heat in a cement factory (case2); combustion heat of municipal waste (case3); and biogas from municipal waste (case4). As a result, it was revealed that case2 brought about the greatest GHG reduction and business feasibility. In addition, several important viewpoints were discussed in utilizing heat sources and renewable energy derived from sewage sludge.