TY - JOUR
T1 - Mitigation of membrane biofouling in membrane bioreactor treating sewage by novel quorum quenching strain of Acinetobacter originating from a full-scale membrane bioreactor
AU - Tabraiz, Shamas
AU - Shamurad, Burhan
AU - Petropoulos, Evangelos
AU - Quintela-Baluja, Marcos
AU - Charlton, Alex
AU - Dolfing, Jan
AU - Sallis, Paul J.
N1 - Research funded by Commonwealth Scholarship Commission.
PY - 2021/8/1
Y1 - 2021/8/1
N2 - A 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.
AB - A 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.
KW - Acinetobacter guillouiae
KW - Acyl homoserine lactone
KW - Membrane bioreactor
KW - Quorum quenching
KW - Quorum sensing
U2 - 10.1016/j.biortech.2021.125242
DO - 10.1016/j.biortech.2021.125242
M3 - Article
C2 - 33964813
SN - 0960-8524
VL - 334
SP - 1
EP - 10
JO - Bioresource Technology
JF - Bioresource Technology
M1 - 125242
ER -