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Removal of emerging micropollutants from nanofiltration retentate of municipal wastewater within biological fixed-bed reactors under nitrifying and denitrifying conditions
Citation Link: https://doi.org/10.15480/882.8999
Publikationstyp
Journal Article
Date Issued
2023-12
Sprache
English
Author(s)
TORE-DOI
Journal
Volume
95
Issue
12
Article Number
e10953
Citation
Water Environment Research 95 (12): e10953 (2023-12)
Publisher DOI
Scopus ID
Publisher
John Wiley and Sons Inc
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.
Subjects
denitrification
fixed-bed bioreactor
micropollutants
MicroStop
municipal wastewater
nanofiltration retentate treatment
nitrification
DDC Class
620: Engineering
Publication version
publishedVersion
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Water Environment Research - 2023 - Stricker - Removal of emerging micropollutants from nanofiltration retentate of.pdf
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