Temperature and immigration effects on quorum sensing in the biofilms of anaerobic membrane bioreactors

Journal article

Tabraiz, Shamas, Petropoulos, Evangelos, Shamurad, Burhan, Quintela-Baluja, Marcos, Mohapatra, Sanjeeb, Acharya, Kishor, Charlton, Alex, Davenport, Russell J, Dolfing, Jan and Sallis, Paul J 2021. Temperature and immigration effects on quorum sensing in the biofilms of anaerobic membrane bioreactors. Journal of Environmental Management. 293, p. 112947. https://doi.org/10.1016/j.jenvman.2021.112947

Publication dates
Authors	Tabraiz, Shamas, Petropoulos, Evangelos, Shamurad, Burhan, Quintela-Baluja, Marcos, Mohapatra, Sanjeeb, Acharya, Kishor, Charlton, Alex, Davenport, Russell J, Dolfing, Jan and Sallis, Paul J
Abstract	Quorum sensing (QS), a microbial communication mechanism modulated by acyl homoserine lactone (AHL) molecules impacts biofilm formation in bioreactors. This study investigated the effects of temperature and immigration on AHL levels and biofouling in anaerobic membrane bioreactors. The hypothesis was that the immigrant microbial community would increase the AHL-mediated QS, thus stimulating biofouling and that low temperatures would exacerbate this. We observed that presence of immigrants, especially when exposed to low temperatures indeed increased AHL concentrations and fouling in the biofilms on the membranes. At low temperature, the concentrations of the main AHLs observed, N-dodecanoyl-L-homoserine lactone and N-decanoyl-L-homoserine lactone, were significantly higher in the biofilms than in the sludge and correlated significantly with the abundance of immigrant bacteria. Apparently low temperature, immigration and denser community structure in the biofilm stressed the communities, triggering AHL production and excretion. These insights into the social behaviour of reactor communities responding to low temperature and influx of immigrants have implications for biofouling control in bioreactors. [Abstract copyright: Copyright © 2021 Elsevier Ltd. All rights reserved.]
Keywords	Quorum Sensing; Temperature; Bioreactors; Biofilms; Anaerobic membrane bioreactor; Fouling; Low-temperature effect; Immigrant community effect; Anaerobiosis; Emigration and Immigration; Quorum sensing
Year	2021
Journal	Journal of Environmental Management
Journal citation	293, p. 112947
Publisher	Elsevier
ISSN	1095-8630
Digital Object Identifier (DOI)	https://doi.org/10.1016/j.jenvman.2021.112947
Official URL	https://www.sciencedirect.com/science/article/pii/S0301479721010094?via%3Dihub
Online	11 Jun 2021
Publication process dates
Accepted	10 May 2021
Deposited	20 Dec 2021
Output status	Published

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