TY - JOUR
T1 - Decreasing hydraulic retention time of anaerobic membrane bioreactor
T2 - Effect on core genera and microbial contaminants removal
AU - Medina, Julie Sanchez
AU - Zhang, Shuo
AU - Wang, Changzhi
AU - Zhou, Jianqiang
AU - Hong, Pei Ying
N1 - Funding Information:
This study was supported by the KAUST WDRC CCF fund FCC/1/1941-43-01 awarded Peiying Hong. The authors would like to thank the KAUST FM Utilities team for their assistance in sampling.
Funding Information:
This study was supported by the KAUST WDRC CCF fund FCC/1/1941-43-01 awarded Peiying Hong. The authors would like to thank the KAUST FM Utilities team for their assistance in sampling.
Publisher Copyright:
© 2023 The Authors
PY - 2023/6
Y1 - 2023/6
N2 - A pilot-scale (35 L) anaerobic membrane bioreactor (AnMBR) treating municipal wastewater was operated under decreasing hydraulic retention times (HRT) of 12 h, 10 h and 8 h, and evaluated for its performance and removal of bacterial cells. There was an increased variability in COD and bacterial cells removal when HRT was 8 h, and a positive net growth rate of potential pathogen-containing genera Mycobacterium sp. was reported when AnMBR was operated at HRT of 8 h. Specifically, metagenomic assembled genomes of opportunistic pathogenic Mycobacterium franklinii were reconstructed uniquely in the 8 h HRT effluent. In contrast, co-occurrence network results showed when the HRT was 10 h, the microbial interactions were higher and bacterial syntrophs and methanogens had a more prevalent role in the microbial network. Our findings suggest that an optimal HRT (10 h) is required to achieve stable AnMBR performance and removal of microbial contaminants from untreated municipal wastewater, and can facilitate proper sizing of AnMBR.
AB - A pilot-scale (35 L) anaerobic membrane bioreactor (AnMBR) treating municipal wastewater was operated under decreasing hydraulic retention times (HRT) of 12 h, 10 h and 8 h, and evaluated for its performance and removal of bacterial cells. There was an increased variability in COD and bacterial cells removal when HRT was 8 h, and a positive net growth rate of potential pathogen-containing genera Mycobacterium sp. was reported when AnMBR was operated at HRT of 8 h. Specifically, metagenomic assembled genomes of opportunistic pathogenic Mycobacterium franklinii were reconstructed uniquely in the 8 h HRT effluent. In contrast, co-occurrence network results showed when the HRT was 10 h, the microbial interactions were higher and bacterial syntrophs and methanogens had a more prevalent role in the microbial network. Our findings suggest that an optimal HRT (10 h) is required to achieve stable AnMBR performance and removal of microbial contaminants from untreated municipal wastewater, and can facilitate proper sizing of AnMBR.
KW - Antimicrobial resistome
KW - Metagenomics
KW - Microbial co-occurrence networks
KW - Municipal wastewater
KW - Mycobacterium
UR - http://www.scopus.com/inward/record.url?scp=85150935977&partnerID=8YFLogxK
U2 - 10.1016/j.biteb.2023.101389
DO - 10.1016/j.biteb.2023.101389
M3 - Article
AN - SCOPUS:85150935977
SN - 2589-014X
VL - 22
JO - Bioresource Technology Reports
JF - Bioresource Technology Reports
M1 - 101389
ER -
