摘要
采用臭氧光催化氧化技术深度处理含有印染废水的城市污水,考察了臭氧浓度和水力停留时间对COD去除率的影响,并对比分析了单纯臭氧氧化与臭氧光催化氧化对低浓度有机废水的处理效能。研究结果显示:试验水质下,臭氧光催化氧化的最佳臭氧强度为60%、最佳水力停留时间为21 min;最佳工况下对COD的去除率可达到78%,较单纯臭氧氧化对COD的去除率高9%。此外,经臭氧光催化氧化处理后,废水的可生化性得到改善,且BOD5/COD值随着水力停留时间的延长而增大。
Ozone/photocatalytic oxidation was used for advanced treatment of municipal wastewater containing printing and dyeing wastewater. The effects of ozone concentration and hydraulic retention time on COD removal were investigated. The treatment efficiency of low-concentration organic wastewater by ozonation was compared with that by ozone/photocatalytic oxidation. The results indicated that the optimal conditions of ozone/photocatalytic oxidation were as follows： 03 concentration of 60% and hydraulic re- tention time of 21 min. Under these conditions, the COD removal rate was 78%, which increased by 9% compared with ozonation. The BODJCOD ratio increased with the extension of hydraulic retention time, and the biodegradability of wastewater was improved after ozone/photocatalytic oxidation.
出处
《中国给水排水》
CAS
CSCD
北大核心
2013年第23期114-116,共3页
China Water & Wastewater
关键词
臭氧光催化氧化
印染废水
可生化性
ozone/photocatalytic oxidation
printing and dyeing wastewater
biodegradability
