About SAKAGAMI YOSHIKAZU
About 大阪府公衆衛研
About YOKOYAMA HIROSHI
About 大阪府公衆衛研
About OSE YOKI
About waste water treatment
About activated sludge process
About Biological treatment of sewage and wastewater
About Microorganism physiology in general
About Physicochemical pharmacy in general
About 殺菌
About 消毒剤
About 活性汚泥
About 分解