Comparative performance of nanofiltration and forward osmosis membranes in a lab-scale forward osmosis membrane bioreactor

Fozia Parveen, Nick Hankins

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

Nanofiltration (NF) and commercial HTI Forward Osmosis (FO) membranes were tested in a live membrane bioreactor (MBR) for performance comparison. Inorganic draws (NaCl, Na3PO4), surfactants (TEAB, SDS), and polyelectrolytes (PDAC, PGBE) were all tested as draw solutes; water flux, reverse solute transport (RST), toxicity and viscosity were observed and compared for each. Synthetic municipal wastewater was selected as a feed and Bacillus Subtilis species was inoculated in the solution and grown overnight for development of a monoculture bioreactor. Deionized (DI) water was also used as a feed for control. The results indicated that the NF membrane showed good promise in the FOMBR process when used with high molecular weight draw solutions. In comparison to the FO membrane, it showed a significantly higher water flux with only a slightly higher RST. The NF membrane is recommended for further investigation in the FOMBR, provided fouling control is in place. Although the observed reverse solute transport values were not toxic to the bacteria under observation, long-term accumulation of draw solute in the bioreactor of an FOMBR wastewater treatment plant is an issue which requires further investigation.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalJournal of Water Process Engineering
Volume28
DOIs
Publication statusPublished - Apr 2019
Externally publishedYes

Keywords

  • Draw solution
  • FOMBR
  • Toxicity
  • Viscosity
  • Waste water recycle
  • Water flux

Fingerprint

Dive into the research topics of 'Comparative performance of nanofiltration and forward osmosis membranes in a lab-scale forward osmosis membrane bioreactor'. Together they form a unique fingerprint.

Cite this