WASTE WATER TREATING METHOD

Japanese Patent JP3548493

B2

PROBLEM TO BE SOLVED: To provide a waste water treating method capable of cleaning waste water over a long period of time and stably by effectively regenerating a solid catalyst deteriorated in oxidation/decomposition activity in the case when the waste water containing organic and/or inorganic oxidizable material is subjected to oxidation/decomposition treatment at a treating temperature below 170°C and under a pressure at which the waste water keeps the liquid phase, which are relatively low temperature/low pressure, by using a solid catalyst containing activated carbon.
SOLUTION: In the waste water treating method in which the waste water containing the organic and/or the inorganic oxidizable material is subjected to oxidation and/or oxidative decomposition by using the catalyst, the waste water is treated while supplying oxygen-containing gas by using the solid catalyst at a treating temperature of ≥50°C and below 170°C and under a pressure at which the waste water keeps the liquid phase. A catalyst regenerating solution containing a readily decomposable oxidizable material is also supplied to the solid catalyst, and the device is operated at a temperature of ≥55°C and below 200°C while regenerating the solid catalyst.

Takaaki Hashimoto
Yusuke Shioda
宮▲碕▼ 邦典
Toru Ishii

JP2000114131A

July 28, 2004

April 14, 2000

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Nippon Shokubai Co., Ltd.

C02F1/74; B01J23/42; B01J23/44; B01J23/96; B01J38/14; B01J38/52; B01J38/54; (IPC1-7): C02F1/74; B01J23/42; B01J23/44; B01J38/14; B01J38/52

JP9155364A
JP9010602A

Etsushi Kotani
Kyuichi Ueki

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