Submerged module of outer selective hollow fiber membrane for effective fouling mitigation in osmotic membrane bioreactor for desalination

Van Huy Tran, Sherub Phuntsho, Dong Suk Han, Ugyen Dorji, Xiwang Zhang, Ho Kyong Shon

Research output: Contribution to journalArticleResearchpeer-review

Abstract

This paper investigated the membrane fouling mitigation efficacy and performance of a home-made submerged module containing outer selective hollow fiber thin film composite forward osmosis (OSHF TFC FO) membrane in osmosis membrane bioreactor (OMBR) system treating municipal wastewater for desalination. Initial tests, optimization of draw solution flowrate and pumping mode for the submerged module were carried out before it was applied into the OMBR system. Overall, the OMBR system exhibited an initial water flux of approximately 6.3 LMH using 35 g/L NaCl as draw solution, and high removal efficiencies of bulk organic matter and nutrients. Moreover, membrane fouling was effectively mitigated with slow rate of flux decline during 33-day operation of the OMBR system. These results indicated that the submerged membrane module of OSHF TFC FO membrane has stable and reliable performances making it suitable for OMBR supplication without the need of air scouring to prevent membrane fouling.

Original languageEnglish
Article number114707
Number of pages10
JournalDesalination
Volume496
DOIs
Publication statusPublished - 15 Dec 2020

Keywords

  • Forward osmosis membrane
  • Membrane fouling
  • Osmotic membrane bioreactor
  • Outer-selective hollow fiber
  • Submerged membrane module

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