期刊
WATER ENVIRONMENT RESEARCH
卷 95, 期 12, 页码 -出版社
WILEY
DOI: 10.1002/wer.10953
关键词
denitrification; fixed-bed bioreactor; micropollutants; MicroStop; municipal wastewater; nanofiltration retentate treatment; nitrification
This study investigated the biological treatment of nanofiltration effluent under different conditions to eliminate micropollutants. The results showed that gabapentin, iomeprol, and metoprolol had high elimination rates under both aerobic and nitrate-denitrifying conditions, while diclofenac had a higher elimination rate with longer hydraulic retention time. The elimination of sulfamethoxazole was influenced by the treatment condition.
Municipal water resource recovery facilities are not designed to eliminate micropollutants, leading to many pollutants entering the aquatic environment. Within this study, as part of the project MicroStop, the biological treatment of nanofiltration effluent (retentate) under pure aerobic (without nitrification) as well as nitrifying and denitrifying conditions has been investigated for micropollutant elimination. A potential of further biotransformation under increased hydraulic retention time (HRT) of 14 days was shown. Under both HRT of 7 and 14 days, eliminations below LOQ were achieved in the aerated bioreactor for gabapentin, iomeprol, and metoprolol, reaching > 95%, > 69 to > 92%, and > 72%, respectively. The reduction of diclofenac was positively influenced by longer HRT leading to an elimination of up to 67%. Sulfamethoxazole was reduced under denitrification, but accumulated under aeration, resulting in fluctuating results and an overall elimination of 78% under 14 days HRT.Practitioner Points The micropollutant elimination in fixed-bed bioreactors of highly concentrated nanofiltration retentate was studied. Pure aerobic (without nitrification), nitrifying, and denitrifying conditions were investigated under hydraulic retention times (HRT) of 7 and 14 days. Higher initial pollutant concentrations enhanced the biological degradability in attached growth for substances being moderately degradable in activated sludge systems. 4A potential of further biological micropollutant elimination was shown for gabapentin, iomeprol, metoprolol, and diclofenac.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据