INTEGRATION PLANNING OF SLUDGE TREATMENT FUNCTION AND INCINERATION FUNCTION TOWARD IMPROVEMENT OF ENERGY BALANCE THROUGHOUT REGION

Abstract

 In this study, we targeted in a 100, 000 inhabited city, and designed two measures: The first one is integration of sludge treatment function, where septic tank sludge is treated with sewage sludge in a sewage treatment plant (STP); The second one is integration of incineration function, where dewatered sludge is incinerated with Municipal Solid Waste (MSW) in a MSW incineration plant.Direct combustion of dewatered sludge in a MSW incinerator is targeted for, and we developed the energy balance analysis model for estimating varidation of combustion gas temperature. Base case stands for no integration planning, and case B does both two integration measures. Under a system without digestion tank installation in a STP, energy recovery rates were estimated to 14.9% in Base (nonDG) case, and 30.4% in Case B2 (nonDG) where a high-efficiency sludge dewatering equipment is installed in a STP. Under a system with digestion installation, energy recovery rates were estimated to 20.7% in Base (DG) case, and 30.2% in Case B (DG).