Abstract
Osmotic membrane bioreactor (OMBR), which integrates forward osmosis (FO) with biological treatment, has been developed to advance wastewater treatment and reuse. OMBR is superior to conventional MBR, particularly in terms of higher effluent quality, lower membrane fouling propensity, and higher membrane fouling reversibility. Nevertheless, advancement and future deployment of OMBR are hindered by salinity build-up in the bioreactor (e.g., up to 50 mS/cm indicated by the mixed liquor conductivity), due to high salt rejection of the FO membrane and reverse diffusion of the draw solution. This review comprehensively elucidates the relative significance of these two mechanisms towards salinity build-up and its associated effects in OMBR operation. Recently proposed strategies to mitigate salinity build-up in OMBR are evaluated and compared to highlight their potential in practical applications. In addition, the complementarity of system optimization and modification to effectively manage salinity build-up are recommended for sustainable OMBR development.
Original language | English |
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Pages (from-to) | 301-310 |
Number of pages | 10 |
Journal | Bioresource Technology |
Volume | 257 |
Early online date | 23 Feb 2018 |
DOIs | |
Publication status | Published - 1 Jun 2018 |
Bibliographical note
Copyright © 2018 Elsevier Ltd. All rights reserved.Funding
This research was supported under the National Natural Science Foundation of China (Project 51708547).
Keywords
- Biological treatment
- Draw solution
- Forward osmosis (FO)
- Osmotic membrane bioreactor (OMBR)
- Salinity build-up
ASJC Scopus subject areas
- Bioengineering
- Environmental Engineering
- Renewable Energy, Sustainability and the Environment
- Waste Management and Disposal