Abstract
Cellulose profiles in actual wastewater treatment plants were surveyed as a first step to use cellulose containing raw wastewater and sludge. Cellulose in primary sludge of separate sewer system was estimated to be contained more than that of combined sewer system, resulting in about 17w/w% per SS. Sludge sampling from primary sedimentation tank of separate sewer system was concluded to be most effective for recovery of cellulose. As a result of calculation, recovery amount of cellulose from wastewater treatment plants in Japan was estimated at about 400, 000 t in year. Therefore, potential biomass resources and energy were suggested to be contained in sludge of wastewater treatment plants in Japan.
