COMPARISON STUDY BETWEEN ENERGY RECOVERY TECHNOLOGIES BY WASTE CO-FIRING POWER GENERATION AND BIOGAS GENERATION IN WASTE INCINERATION AND SEWAGE TREATMENT PLANTS IN WAKAYAMA CITY

Abstract

 The aim of this study was to analyze the power generation and GHG reduction in several energy recovery systems used in municipal waste incineration and sewage treatment plants in Wakayama City. Scenarios were first constructed by combining the energy recovery technology with either the waste incineration plant or sewage treatment plant and then, other scenarios were constructed based on mixing the sludge and waste from both plants followed by incineration or biogasification. The power generation and GHG reduction in these scenarios were calculated based on heat balance analysis. The results indicated that the power generation increased and the GHGs decreased in all scenarios compared with the present system. The scenario involving biogas power generation was the one achieving the highest energy recovery.