Abstract: It takes alcohol-ether wastewater from HPPO unit as the research object, the degradation performance of Fenton oxidation, Fenton and micro electrolysis, two-phase cyclic catalytic oxidation, UV and other coupling methods and catalytic wet air oxidation(CWAO) technologies on the contaminants are investigated. The operation efficiency of each process is compared. The results show that Fenton process can effectively reduce the COD of wastewater, but forming large amount of sludge. The biodegradability of treated wastewater can be improved by biphasic cyclic catalytic oxidation, so the biochemical process should be used for subsequent treatment. The degradation efficiency of alcohol-ether wastewater by UV-Fenton is higher than that by Fenton process alone, and the sludge formation is greatly reduced. The total organic carbon and COD removal rate of alcohol-ether wastewater by CWAO process can reach 57.79% and 72.31%, respectively, and the ammonia nitrogen removal rate can reach 92%. Considering economic efficiency, UV-Fenton or biphasic cyclic catalytic oxidation method should be used to treat alcohol-ether wastewater.

Key words: HPPO unit, alcohol-ether wastewater, advanced oxidation process, Fenton, biphasic cyclic catalytic, UV photocatalysis

摘要： 以HPPO(双氧水法制环氧丙烷)装置醇醚废水为研究对象,通过研究单独Fenton氧化法及Fenton与微电解、双相循环催化氧化及紫外光催化(UV)等耦合法和催化湿式氧化技术对污染物的降解效果,对比各工艺的运行效能。结果表明,Fenton法可有效降低废水的化学需氧量(COD),但产泥量较大。使用双相循环催化氧化法处理后,废水的可生化降解性能提高,宜采用生化法进行后续处理。UV-Fenton法降解醇醚废水效率高于传统Fenton法,且产泥量较传统Fenton法大幅减少。催化湿式氧化工艺处理后,醇醚废水的总有机碳及COD去除率分别达到57.79%和72.31%,氨氮去除率可达到92%。综合经济效能,宜采用UV-Fenton或双相循环催化氧化法法对醇醚废水进行处理。

关键词: HPPO装置, 醇醚废水, 高级氧化, Fenton, 双相循环催化, 紫外光催化