합성세제의 오염과 상수정수처리에 의한 그 제거효과에 관한 조사연구

Studies on Pollution and Reduction of Synthetic Detergents by Tap Water Treatment

This investigation was undertaken from February 1976 to September 1976. The detergents in municipal sewages from the Chung Kae Stream, Ahn Yang Stream and Bong Won Stream were determined at 1.5ppm, 0.93ppm, and 3.36ppm in average respectively. The concentrations of detergents determined in the Han river were 0.013ppm of Kwang Na Ru, 0.11ppm of Duk Do, 0.370ppm of Bo Kwang Dong and 0.285ppm of Ka Yang Dong basin respectively. And the potable waters of Sung Book Ku and Sung Dong Ku from Ku En water pumping station located up-stream of the Han river were less polluted at 0.045ppm and 0.037ppm in average. Young Deung Po Ku and Su Dae Moon Ku had been relatively polluted at 0.181ppm and 0.133ppm. The coagulant, alum[Al2(SO4)3] could eliminate the small amount of detergent by coagulation. The eliminated rates were about 13% by 5ppm and 22.7% by 20ppm of aluminum sulfate in sewage contained 10ppm of turbidity. The sand and the charcoal adsorbed some detergent as the following Langmuir''s equations: For the sand, m/x=0.029 X 1/Ce- 11.43 For the charcoal, m/x=2.705log1/Ce-5.46 Where m: amount of sand and active carbon used(g) x: amount of detergent adsorbed from liquid(g) Ce: concentration in the liquid at equilibrium(moles) The adsorption effect of sand would be neglected. In the low concentration of detergent solution, one gram of active carbon adsorbed 0.263g of detergent. It was determined that one gram of chlorine reduced 5.5g of DBS in keeping up 0.2ppm of residual chlorine by disinfection process with chlorine compound.