紫外催化湿式氧化工艺降解油墨废水

Degradation of ink wastewater by UV-catalytic wet oxidation process

为了解决传统催化湿式过氧化氢氧化技术需要高温高压等苛刻条件的问题,将紫外引入催化湿式氧化技术,得到可在常温常压条件下进行的紫外催化湿式氧化工艺(UV-CWOP)。以Cu2+为催化剂,采用该工艺处理油墨废水取得了良好的效果。通过单因素实验确定的最佳工艺条件为:pH值=3,H2O2用量为1.5倍理论量,CuSO4.5H2O投量2 g/L,初始温度40℃。在此条件下处理油墨废水3 h,COD可从9 500 mg/L降解到89 mg/L,出水达到国家《污水综合排放标准》(GB8978-1996)一级标准。

In order to solve the problem of traditional catalytic wet peroxide oxidation（CWPO） which needs harsh conditions of high temperature and high pressure, UV-catalytic wet oxidation process（UV-CWOP） was set up by introducing ultraviolet into CWPO technology, which could run under the normal temperature and pres- sure. Catalyzed by Cu2＋ , a high COD removal using the process in ink wastewater treatment was obtained. The optimal technological conditions, determined by single factor experiment, are as follows： pH of 3; H202 of 1.5 times theory; CuSO4·5H20 of 2 g/L; initial temperature of 40℃. Under the optimal conditions, COD could decrease from 9 500 mg/L to 89 mg/L with 3 hours treatment, and the effluent quality can meet the first class criteria specified in the Integrated Wastewater Discharge Standard （GB8978-1996）.