Abstract
In this research, we estimated the potential of demand and supply in sewage sludge fuelization system utilizing paper and pulp production infrastructures in Kinki, Chugoku and Shikoku Area between 2010 and 2040. We set 3 energy-conserving technologies to be installed in sewage treatment facilities (granulation drying, bio-oiling, digestive gas purification). We also estimated GHG emissions through the introduction of this system. From the analysis, we reached the following conclusions; 1) In all scenarios for economic growth of paper and pulp industry (high and low growth scenario) based on the prediction in the previous research, 10 paper and pulp production infrastructures could accept fuelized sewage sludge and purified digestive gas from 37 sewage treatment facilities. 2) The sewage sludge fuelization system in collaboration with the paper and pulp production infrastructures could reduce GHG emissions 39.7% between 2020 and 2040 (compared with the case that conventional sewage sludge treatment is continuing).
