A sewer system that carries only sanitary sewage; no storm-water runoff. When a sewer is constructed this way, wastewater treatment plants can be sized to treat sanitary wastes only and all of the water entering the plant receives complete treatment at all times.
SEPARATE SEWER
Meaning of SEPARATE SEWER in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012