産業工場やごみ焼却場と連携した下水汚泥燃料利用等における将来社会変化や汚泥処理の集約化がGHG削減に及ぼす効果

抄録

　　In this study, we analyzed the effect of GHG reduction by utilizing various sewage sludge fuels based on collaboration among sewage infrastructures, industrial infrastructures, and domestic waste incinerations as well as sludge treatment aggregations from 2020 to 2030.　First, we estimated the amount of un-utilized sludge, and acceptance capacity of sludge fuel at industrial factories and municipal incinerators.　Second, we extracted the small-sized sewage treatment facilities that were expected to be aggregated with river basin sewage systems.　Then, GHG reduction effect was analyzed with respect to the GHG inventory of fuelization technologies and allocation rules of sludge fuel.　As a result, collaboration can recover energy from 87.3% of the un-utilized sewage sludge, and reduce 3,900 thousand tons of carbon dioxide.　In addition, GHG reduction influences the production of industrial infrastructures in future and mixed combustion ratios in the pulp industry.

JEL Classifications: Q29, Q42