Role of ammonia-oxidizing bacteria in micropollutant removal from wastewater with aerobic granular sludge

Water Science and Technology : a Journal of the International Association on Water Pollution Research
Jonas MargotChristof Holliger

Abstract

Nitrifying wastewater treatment plants (WWTPs) are more efficient than non-nitrifying WWTPs to remove several micropollutants such as pharmaceuticals and pesticides. This may be related to the activity of nitrifying organisms, such as ammonia-oxidizing bacteria (AOBs), which could possibly co-metabolically oxidize micropollutants with their ammonia monooxygenase (AMO). The role of AOBs in micropollutant removal was investigated with aerobic granular sludge (AGS), a promising technology for municipal WWTPs. Two identical laboratory-scale AGS sequencing batch reactors (AGS-SBRs) were operated with or without nitrification (inhibition of AMOs) to assess their potential for micropollutant removal. Of the 36 micropollutants studied at 1 μg l(-1) in synthetic wastewater, nine were over 80% removed, but 17 were eliminated by less than 20%. Five substances (bisphenol A, naproxen, irgarol, terbutryn and iohexol) were removed better in the reactor with nitrification, probably due to co-oxidation catalysed by AMOs. However, for the removal of all other micropollutants, AOBs did not seem to play a significant role. Many compounds were better removed in aerobic condition, suggesting that aerobic heterotrophic organisms were involved in the ...Continue Reading

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Citations

Jun 1, 2016·The Science of the Total Environment·Yifeng XuBing-Jie Ni
Jan 20, 2020·World Journal of Microbiology & Biotechnology·José Juan Ramírez MuñozAnne-Claire Texier
Dec 8, 2019·Environmental Technology·Ramiro Pereira BisogninRenato Zanella
Nov 9, 2020·Journal of Environmental Management·Isabel Martínez-AlcaláAgustin Lahora
Jan 8, 2021·Chemosphere·Rubén Trejo-CastilloAnne-Claire Texier
Feb 13, 2021·Environmental Pollution·Rayane Kunert LangbehnHugo Moreira Soares
Mar 20, 2021·The Science of the Total Environment·Ashish Sengar, Arya Vijayanandan
Mar 29, 2021·The Science of the Total Environment·David M Kennes-VeigaJuan M Lema
Jan 5, 2021·ACS Applied Materials & Interfaces·Chidambaram ThamaraiselvanChristopher J Arnusch
Aug 23, 2021·World Journal of Microbiology & Biotechnology·Evan RonanSteven N Liss

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