1. 1) Ministry of Environmental，Uniform drainage standard，http://www.env.go.jp/water/impure/haisui.html
2. 2) Study group on water problem，Actual condition of water pollution，http://mizukk.net/mondai/mondai01-osen/
3. 3) Y．Ogata，“Microorganisms and their use”，Corona Company，pp.5-8(1997)．
4. 4) M．Kitagawa，“Characteristics and chronology of development in aerobic bio-treatment technology”，Ebarajihou，No.228(2010)．
5. 5) Kihoku Town Official Site，“Environmental cleaning microorganisms(EhimeAI-1・EhimeAI-2)，http://www.town.kihoku.ehime.jp/soshiki/kankyou/2.html