A breakthrough dynamic-osmotic membrane bioreactor/nanofiltration hybrid system for real municipal wastewater treatment and reuse

Nguyen Cong Nguyen; Hau Thi Nguyen; Hung Cong Duong; Shiao-Shing Chen; Huy Quang Le; Chinh Cong Duong; Le Thuy Trang; Chih-Kuei Chen; Phuoc Dan Nguyen; Xuan Thanh Bui; Wenshan Guo; Huu Hao Ngo

doi:10.1016/j.biortech.2021.125930

A breakthrough dynamic-osmotic membrane bioreactor/nanofiltration hybrid system for real municipal wastewater treatment and reuse

Bioresour Technol. 2021 Dec:342:125930. doi: 10.1016/j.biortech.2021.125930. Epub 2021 Sep 13.

Authors

Affiliations

¹ Faculty of Chemistry and Environment, Dalat University, Dalat, Vietnam.
² Le Quy Don Technical University, Hanoi, Vietnam.
³ Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1, Sec. 3, Chung -Hsiao E. Rd, Taipei 106, Taiwan, Republic of China.
⁴ Faculty of Chemistry and Environment, Dalat University, Dalat, Vietnam; Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1, Sec. 3, Chung -Hsiao E. Rd, Taipei 106, Taiwan, Republic of China.
⁵ Southern Institute of Water Resources Research, Ho Chi Ming City, Vietnam.
⁶ Faculty of Environmental and Natural Sciences, Duy Tan University, Vietnam.
⁷ Department of Environmental Engineering, National I-Lan University, I-Lan 26047, Taiwan.
⁸ Centre de Asiatique de Recherche sur l'Eau, Ho Chi Minh City University of Technology-National University-HCM, Vietnam.
⁹ Vietnam National University, Ho Chi Minh City, Vietnam; Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Vietnam.
¹⁰ Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, Broadway, NSW 2007, Australia.
¹¹ Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, Broadway, NSW 2007, Australia. Electronic address: ngohuuhao121@gmail.com.

PMID: 34547711
DOI: 10.1016/j.biortech.2021.125930

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 Na₂CO₃/0.9 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.

Keywords: Draw solution; Dynamic OsMBR; Membrane fouling; Rotating FO module; Surfactant.

MeSH terms

Bioreactors
Membranes, Artificial*
Osmosis
Wastewater
Water Purification*

Substances

Membranes, Artificial
Waste Water