BUILDING ENERGY SYSTEMS IN A MSW INCINERATION PLANT BY LINKING UP WITH A NEIGHBORING SEWAGE TREATMENT PLANT

Abstract

 In this research, energy systems which can be designed in case where a sewage treatment plant (STP) and a municipal solid waste incineration plant (MSW-IP) locate adjacently were covered. I developed the heat balance models for evaluating the systems. In collaborative cases (case X and Y), dewatered sludge is dried by using biogas in a STP and dried sludge is incinerated with MSW in a MSW-IP. In case X, digestion tanks are heated by using extraction steam supplied by a MSW-IP. In addition, a MSW-IP receive cooling water from a STP to increase power generation amount by introducing a water-cooled type condenser under case Y. As compared with base case, the estimated amount of greenhouse gas emissions (t CO2 eq/year) was reduced by 51% in case X, and also by 54% in case Y.