METHOD AND EQUIPMENT FOR DEGRADING PERSISTENT ORGANIC MATTER

PROBLEM TO BE SOLVED: To provide a method and equipment for degrading persistent organic matter in which Fe3+contained in raw water is reduced to Fe2+and utilized by circulation in a system and persistent organic matter is degraded by oxidation by a Fenton reaction. SOLUTION: Raw water containing persistent organic matter and Fe3+is fed into a reduction treatment/Fenton oxidation vessel 1 provided with immersed solid iron, the Fe3+is reduced to Fe2+by contact with the solid iron, hydrogen peroxide is added to the vessel 1, where the Fe2+is oxidized by a Fenton reaction and a hydroxy free radical is generated. The persistent organic matter in the vessel 1 is degraded by oxidation with the generated hydroxy free radical, and the liquid in the vessel 1 is supplied to a UV reaction vessel 6. The persistent organic matter in the vessel 6 is then degraded by dechlorination, UV oxidation or a radical reaction under irradiation with UV from a UV lamp disposed in the vessel 6, and the Fe3+-containing liquid in the UV reaction vessel 6 is circulated to the reduction treatment/Fenton oxidation vessel 1. COPYRIGHT: (C)2003,JPO