Osaka Gas Company Limited

Kenichi Yamasaki

Yoshiaki Harada

Yasuhumi Doi

Teizou Okino

Akio Nakashiba

Shigenobu Yurugi

Hiroyuki Mathura

Hajime Fujitani

Hiroyuki Matuura

The invention provides processes for treating waste water comprising subjecting waste water to liquid phase oxidation without catalyst, liquid phase oxidation with catalyst and anaerobic digestion and/or aerobic treatment.

Process for treating waste water

Waste water containing at least two kinds of components among suspended solids, ammonia and chemically oxidizable substances is treated in a liquid phase oxidation in the presence of a catalyst supported by a carrier of honeycomb construction.

Process for treating waste water by wet oxidations

This invention provides a process for treating ammonium nitrate-containing waste water which comprises subjecting the waste water to wet thermal decomposition in the presence of a catalyst supported by a carrier and containing as an active component at least one of precious metals and compounds thereof insoluble or sparingly soluble in water while maintaining the waste water at a pH of about 3 to about 11.5 and a temperature of about 100.degree. to about 370.degree. C.

Process for treating ammonium nitrate-containing waste water

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Gose, Japan

Kenichi Yamasaki