| 摘要 |
PROBLEM TO BE SOLVED: To provide an apparatus for treating wastewater containing hydrogen peroxide, and using a hydrogen peroxide decomposing catalyst (reducing catalyst), which improves the contact efficiency between the catalyst and the hydrogen peroxide, achieves the down-sizing, space saving, and the reduction of a investment cost. SOLUTION: The upward stream of the wastewater containing the hydrogen peroxide flows into a reaction tower 2, the catalyst is vertically divided to a plurality of layers (such as two upper and lower layers composed of a lower catalytic layer 8 and an upper catalytic layer of 14, respectively) in the reaction tower 2. Further, a gas vent tube 20 is installed within the reaction tower 2. This gas vent tube 20 discharges outside the reaction tower, oxygen gas generated at least in the lowermost catalyst layer, without contacting with any catalytic layer installed above the lowermost catalytic layer. COPYRIGHT: (C)2003,JPO
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