COAGULANT FOR WASTE WATER TREATMENT FOR CAR-WASHING

摘要

PROBLEM TO BE SOLVED: To provide a waste water treating device capable of recycling waste water of car-washing again as washing water for washing the car by cleaning it.

SOLUTION: The device treats waste water of washing containing an oil component and a surfactant and is provided with a coagulation precipitation part of adding a coagulant comprising a combination of an organic coagulant and an inorganic coagulant containing an ionic mineral to the waste water to coagulate and precipitate it; a membrane separation part for solid/liquid- separating the treating water at the coagulation precipitation part in a range of 5-30 kPa by a constant differential pressure between the membranes; and a water storage part for storing the treating water at the membrane separation part. In the waste water treating device, the treating water at the water storing part can be recycled as the washing water.

COPYRIGHT: (C)2003,JPO