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Mitigation of membrane biofouling in membrane bioreactor treating sewage by novel quorum quenching strain of Acinetobacter originating from a full-scale membrane bioreactor

Lookup NU author(s): Shamas Tabraiz, Dr Burhan Shamurad, Dr Evangelos Petropoulos, Marcos Quintela-Baluja, Dr Alex Charlton, Dr Jan Dolfing, Dr Paul Sallis

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Abstract

© 2021 Elsevier LtdA novel quorum quenching (QQ) strain, Acinetobacter guillouiae ST01, was isolated from a full-scale membrane bioreactor (MBR) and characterized for its QQ activities. Batch reactor studies at lab-scale showed that A. guillouiae ST01 exhibited higher QQ activity against acyl homoserine lactones (AHLs) with an oxo group compared to those without an oxo group. The organism was then inoculated (10%) in an MBR (Q-MBR) treating sewage over 48 days and was found to reduce quorum sensing (QS) activity by reducing AHL concentrations in the sludge and the biofilm of the Q-MBR. The concentration of polysaccharides was reduced up to 30% in both the biofilm and sludge relative to the control, whereas protein concentrations were reduced by 40% and 47% in the sludge and biofilm, respectively. The Q-MBR fouling rates were halved. These results indicate that A. guillouiae ST01 is a promising strain for biofouling reduction in MBR treating real wastewater.


Publication metadata

Author(s): Tabraiz S, Shamurad B, Petropoulos E, Quintela-Baluja M, Charlton A, Dolfing J, Sallis PJ

Publication type: Article

Publication status: Published

Journal: Bioresource Technology

Year: 2021

Volume: 334

Print publication date: 01/08/2021

Online publication date: 01/05/2021

Acceptance date: 27/04/2021

ISSN (print): 0960-8524

ISSN (electronic): 1873-2976

Publisher: Elsevier Ltd

URL: https://doi.org/10.1016/j.biortech.2021.125242

DOI: 10.1016/j.biortech.2021.125242


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