Water and nutrient recovery by a novel moving sponge - Anaerobic osmotic membrane bioreactor - Membrane distillation (AnOMBR-MD) closed-loop system

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

doi:10.1016/j.biortech.2020.123573

Water and nutrient recovery by a novel moving sponge - Anaerobic osmotic membrane bioreactor - Membrane distillation (AnOMBR-MD) closed-loop system

Bioresour Technol. 2020 Sep:312:123573. doi: 10.1016/j.biortech.2020.123573. Epub 2020 May 24.

Authors

Affiliations

¹ Faculty of Chemistry and Environment, Dalat University, Dalat, Viet Nam.
² Le Quy Don Technical University, Hanoi, Viet Nam.
³ Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1, Sec. 3, Chung -Hsiao E. Rd, Taipei 106, Taiwan, ROC.
⁴ 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.
⁵ Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology, Sydney, Broadway, NSW 2007, Australia.
⁶ Faculty of Chemistry and Environment, Dalat University, Dalat, Viet Nam; Institute of Environmental Engineering and Management, National Taipei University of Technology, No.1, Sec. 3, Chung -Hsiao E. Rd, Taipei 106, Taiwan, ROC.
⁷ Faculty of Environment and Chemical Engineering, Duy Tan University, Viet Nam.
⁸ Faculty of Environment, University of Science, Ho Chi Minh City, Viet Nam; Vietnam National University, Ho Chi Minh City, Viet Nam.
⁹ Vietnam National University, Ho Chi Minh City, Viet Nam; Faculty of Environment and Natural Resources, Ho Chi Minh City University of Technology (HCMUT), Ho Chi Minh City 700000, Viet Nam.
¹⁰ Centre de Asiatique de Recherche sur l'Eau, Ho Chi Minh City University- National University-HCM, Viet Nam.

PMID: 32470825
DOI: 10.1016/j.biortech.2020.123573

Abstract

For the first time, a novel sponge-based moving bed-anaerobic osmosis membrane bioreactor/membrane distillation (AnOMBR/MD) system using mixed Na₃PO₄/EDTA-2Na as the draw solution was employed to treat wastewater for enhanced water flux and reduced membrane fouling. Results indicated that the moving sponge-AnOMBR/MD system obtained a stable water flux of 4.01 L/m² h and less membrane fouling for a period lasting 45 days. Continuous moving sponge around the FO module is the main mechanism for minimizing membrane fouling during the 45-day AnOMBR operation. The proposed system's nutrient removal was almost 100%, thus showing the superiority of simultaneous FO and MD membranes. Nutrient recovery from the MF permeate was best when solution pH was controlled to 9.5, whereby 17.4% (wt/wt) of phosphorus was contained in precipitated components. Moreover, diluted draw solute following AnOMBR was effectively regenerated using the MD process with water flux above 2.48 L/m² h and salt rejection > 99.99%.

Keywords: Anaerobic osmotic membrane bioreactor; Forward osmosis; Mixed draw solute; Moving sponge; Phosphorus recovery.

MeSH terms

Anaerobiosis
Bioreactors
Distillation*
Membranes, Artificial
Nutrients
Osmosis
Wastewater
Water
Water Purification*

Substances

Membranes, Artificial
Waste Water
Water