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Pathak, Nirenkumar,Li, Sheng,Kim, Youngjin,Chekli, Laura,Phuntsho, Sherub,Jang, Am,Ghaffour, Noreddine,Leiknes, TorOve,Shon, Ho Kyong Elsevier 2018 Bioresource technology Vol.262 No.-
<P><B>Abstract</B></P> <P>A novel approach was employed to study removal of organic micropollutants (OMPs) in a baffled osmotic membrane bioreactor-microfiltration (OMBR-MF) hybrid system under oxicanoxic conditions. The performance of OMBR-MF system was examined employing three different draw solutes (DS), and three model OMPs. The highest forward osmosis (FO) membrane rejection was attained with atenolol (100%) due to its higher molar mass and positive charge. With inorganic DS caffeine (94–100%) revealed highest removal followed by atenolol (89–96%) and atrazine (16–40%) respectively. All three OMPs exhibited higher removal with organic DS as compared to inorganic DS. Significant anoxic removal was observed for atrazine under very different redox conditions with extended anoxic cycle time. This can be linked with possible development of different microbial consortia responsible for diverse enzymes secretion. Overall, the OMBR-MF process showed effective removal of total organic carbon (98%) and nutrients (phosphate 97% and total nitrogen 85%), respectively.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A hybrid OMBR-MF examined for OMPs and nutrient removal from simulated sewage. </LI> <LI> Performance of inorganic and organic draw solutes in OMBR-MF system assessed. </LI> <LI> Baffled OMBR-MF achieved high removal for nutrient and OMPs. </LI> <LI> Persistent OMP like atrazine exhibited high anoxic removal compared to oxic. </LI> <LI> Atenolol showed highest forward osmosis rejection due to high molar mass. </LI> <LI> Large microbial flocs contributed to lower membrane fouling propensity. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>