A breakthrough dynamic-osmotic membrane bioreactor/nanofiltration hybrid system for real municipal wastewater treatment and reuse. (December 2021)

• Record Type: Journal Article
• Authors: Cong Nguyen, Nguyen; Thi Nguyen, Hau; Cong Duong, Hung; Chen, Shiao-Shing; Quang Le, Huy; Cong Duong, Chinh; Thuy Trang, Le; Chen, Chih-Kuei; Dan Nguyen, Phuoc; Thanh Bui, Xuan; Guo, Wenshan; Hao Ngo, Huu
• Is Part Of: Bioresource technology. Volume 342(2021)
• Publication Date: 2021-12
• Subjects: Dynamic OsMBR -- Rotating FO module -- Draw solution -- Membrane fouling -- Surfactant; 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.2021.125930
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: A new Dynamic-OsMBR/NF system was designed for wastewater treatment and reuse. Continuously rotating FO module in Dynamic-OsMBR removed cake layer of foulants. 50% more water flux was observed in Dynamic-OsMBR compared to Traditional-OsMBR. Specific reverse flux of mixed DS was 8-fold lower than when using NaCl only. Dynamic-OsMBR/NF hybrid system achieved high contaminant removal (almost > 98%). Abstract: This study designed a Dynamic-Osmotic membrane bioreactor/nanofiltration (OsMBR/NF) system for municipal wastewater treatment and reuse. Results indicated that a continuously rotating FO module with 60 RPM in Dynamic-OsMBR system could enhance shear stress and reduce cake layer of foulants, leading to higher flux (50%) compared to Traditional-OsMBR during a 40-operation day. A negligible specific reverse salt flux (0.059 G/L) and a water flux of 2.86 LMH were recorded when a mixture of 0.1 M EDTA-2Na/0.1 M Na2 CO3 /0.9 mM Triton114 functioned as draw solution (DS). It was found that the Dynamic-OsMBR/NF hybrid system could effectively remove pollutants (∼98% COD, ∼99% PO4 3— P, ∼93% NH4 + -N, > 99% suspended solids) from wastewater. In short, this developed system can be considered a breakthrough technology as it successfully minimizes membrane fouling by shear force, and achieves high water quality for reuse by two membrane- barriers.