酸化破乳-萃取-蒸氨预处理用于催化湿式过氧化氢氧化处理煤气化废水

调酸-萃取-蒸氨工序预处理煤气化废水温度达87~95℃，联合高温催化湿式过氧化氢氧化（catalitic wet peroxide oxidation，CWPO）处理煤气化废水，可显著提高废水可生化性。比较了3% Fe/椰壳炭、3% Fe/Al2O3在CWPO过程中的催化性能。实验结果表明，在反应条件为80℃、pH0为4、H2O2加入量为7.8~10.5 mg·L-1、空速（LHSV）为0.5 h-1时，3% Fe/椰壳炭对预处理煤气化出水COD去除率高达60%，对总酚的去除率高达90%以上，H2O2利用率大于99%，色度由初始1 000倍降至2倍，此外，出水B/C为0.51，达到进入生化处理系统的水质要求。

Acidification demulsion-extraction-steamed ammonia pretreatment for catalytic wet peroxide oxidation of coal gasification wastewater treatment

A method of high temperature CWPO with a combination pretreatment process of acidification demulsion, extraction and steamed ammonia whose effluent presented its temperature as high as 87 to 95℃ was investigated to improve the biodegradability of coal gasification wastewater. Compared 3%Fe/Al2O3 and 3%Fe/SAC, over 60% of COD and 90% of the total phenol could be removed under the optimized condition(temperature of 80℃, pH0 of 4,H2O2 of 7.8 to 10.5 mg·L-1, LHSV of 0.5 h-1) with 3%Fe/SAC for the pretreatment of coal gasification effluent. COD removal rate as high as 60%, the total phenol removal rate as high as 90% above, the H2O2 utilization rate was more than 99% and chromaticity by initial 1 000 times down to 2 times, in addition, the effluent could reach the requirements of water quality standard for biochemical treatment system due to its high biodegradability as B/C=0.51.