公益財団法人日本環境整備教育センター Japan Education Center of Environmental Sanitation 

　

　The ratio of certified structure type johkasou to new johkasou is increasing year by year, and currently, certified structure type johkasou accounts for 98% of newly installed johkasou in detached houses. New models are developed every year, and in Heisei 22, a johkasou with a smaller effective capacity than the conventional compact johkasou was developed.

　This johkasou is commonly known as the “more compact type johkasou”, and by reducing the capacity of the primary treatment unit in addition to the capacity of the secondary treatment unit, the entire johkasou has a smaller capacity, resulting in an anaerobic filtration. It has the same capacity as the anaerobic filter bed tank of the floor contact aeration method. In order to reduce the capacity of primary treatment equipment, new technologies have been added, such as the transfer of separated sludge and the reduction of sludge volume through aerobic digestion.

　Of the more compact type johkasou, this workshop focuses on the KTG and CF types, which have the most installed bases. The purpose of this training is to improve the skills of related engineers and improve their social credibility.