WATER TREATMENT METHOD OF OIL-CONTAINING WASTE WATER, AND WATER TREATMENT APPARATUS OF OIL-CONTAINING WASTE WATER

摘要

PROBLEM TO BE SOLVED: To provide a water treatment method and a water treatment apparatus of oil-containing waste water.;SOLUTION: An oil remover composed of one or both of a natural polymer based oil remover and a synthetic polymer based oil remover is added to oil-containing water to be treated (waste water) and then a cationic organic polymer coagulant is added and mixed to form flock. The thus formed flock has low adhesiveness and so as to avoid equipment troubles. Further, the flock is strong enough to endure mechanical solid-liquid separation so as to be efficiently thickened and dehydrated.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT