Organic micropollutants removal in sequential batch reactor followed by nanofiltration from municipal wastewater treatment. (November 2018)

• Record Type: Journal Article
• Authors: Wei, Chun-Hai; Wang, Nan; HoppeJones, Christiane; Leiknes, TorOve; Amy, Gary; Fang, Qian; Hu, Xiaodong; Rong, Hongwei
• Is Part Of: Bioresource technology. Volume 268(2018)
• Page Start: 648
• Page End: 657
• Publication Date: 2018-11
• Subjects: Compound retention time -- Membrane bioreactor -- Nanofiltration -- Organic micropollutants -- Sequential batch reactor; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.08.073
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Removal performance and mechanism of 26 OMPs investigated in SBR alone and SBR-NF. Biomass and OMPs rejection by NF enhanced the biological removal of OMPs in SBR. Significant accumulation of OMPs in SBR occurred due to high NF rejection. Electron donating/withdrawing group and halogen substitute affected OMPs removal. Short term PAC sorption for OMPs and bulk COD observed under one dose (100 mg/L). Abstract: The removal of 26 organic micropollutants (OMPs) in synthetic municipal wastewater was investigated via the process of aerobic sequential batch reactor (SBR) alone and SBR followed by nanofiltration (NF). SBR-NF performed better than SBR alone, ascribed to the contribution of NF: 1) complete biomass rejection resulted in diverse microbial community and much less fluctuated performance than SBR alone, and 2) direct OMPs rejection (74–98%) increased their retention time in SBR and thus overall removal via biodegradation/transformation and accumulation in SBR. Nine OMPs showed high biological removal (over 60%), 6 OMPs showed moderate biological removal (30–70%) and 10 OMPs showed low biological removal (below 40%). Most readily and moderately biodegradable OMPs contained strong electron donating group. Most refractory OMPs contained strong electron withdrawing group and/or halogen substitute. The batch addition of powdered activated carbon (100 mg/L) into SBR showed short term sorption performance for both OMPs and bulk organics.