Abstract
Water qualities of household sewage from many communities were analyzed, and pollution loads of detergents were investigatcd with different kinds of washing detergents.
Approximately half of the daily amounts of pollutants were discharged from 7 a.m. to 11 a.m. The maximum concentrations of anionic and nonionic surfactants were 41 mg/1 and 25 mg/1, respectively. During the period when only soap was used for washing, the BOD load was increased by 10 - 13 g/person/day, but loads of anionic surfactants and phosphorous were decreased by 1.2 - 2.0 g/person/day and 0.16 -0.39 g/person/day, respectively.
