Operation Data on a Treating Plant for Waste Water Discharged from Chemical Laboratories of a Pharmaceutical College : Especially Effect on the Removal of Heavy Metals from the Waste Water with a Method of Aggregation Precipitation

Abstract

Colleges and institutes related with science and technology are daily using toxic substances in the process of education and study. Even though the amount used is generally small, toxic substances should be eliminated to keep clean environment. The Water Pollution Control Law in Japan has required the elimination of toxic substances from waste water as a duty for the colleges and institutes since 1974. According to the requirement, a treating plant for chemical waste water discharged from the laboratories of Kobe Women's College of Pharmacy was constructed in 1975. The outline of the program and the analytical data on the water and the sludge produced from the plant are described in this paper. The analytical data suggest that the treating plant has been operated effectively to eliminate toxic substances from the chemical waste water.