METHOD FOR REDUCING COD (CHEMICAL OXYGEN DEMAND) IN WASTE WATER BY USING O3 WITH VALENT ION CHELATION

摘要

PROBLEM TO BE SOLVED: To provide a new and ozone-saving method for treating organic matter-containing waste water.;SOLUTION: This invention provides the method for reducing chemical oxygen demand (COD) in waste water. In the method, a valent ion, capable of terminating oxidation of organic matter in the waste water by ozone, is used with ozone to reduce the COD in the waste water. In one embodiment, the valent ion is selected from a group comprising ions of sodium, potassium, calcium, magnesium, aluminum, iron, chromium, titanium and niobium.;COPYRIGHT: (C)2010,JPO&INPIT