Hydrophobic Gas Transfer Membranes for Wastewater Treatment and Resource Recovery

Dianxun Hou, David Jassby, Robert Nerenberg, Zhiyong Jason Ren

Research output: Contribution to journalReview article

5 Scopus citations

Abstract

Gaseous compounds, such as CH4, H2, and O2, are commonly produced or consumed during wastewater treatment. Traditionally, these gases need to be removed or delivered using gas sparging or liquid heating, which can be energy intensive with low efficiency. Hydrophobic membranes are being increasingly investigated in wastewater treatment and resource recovery. This is because these semipermeable barriers repel water and create a three-phase interface that enhances mass transfer and chemical conversions. This Critical Review provides a first comprehensive analysis of different hydrophobic membranes and processes, and identifies the challenges and potential for future system development. The discussions and analyses were grouped based on mechanisms and applications, including membrane gas extraction, membrane gas delivery, and hybrid processes. Major challenges, such as membrane fouling, wetting, and limited selectivity and functionality, are identified, and potential solutions articulated. New opportunities, such as electrochemical coating, integrated membrane electrodes, and membrane functionalization, are also discussed to provide insights for further development of more efficient and low-cost membranes and processes.

Original languageEnglish (US)
Pages (from-to)11618-11635
Number of pages18
JournalEnvironmental Science and Technology
Volume53
Issue number20
DOIs
StatePublished - Oct 15 2019

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Environmental Chemistry

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