Skip to main content

Addressing Reverse Osmosis Fouling Within Water Reclamation — A Side-By-Side Comparison of Low-Pressure Membrane Pretreatments

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

A tertiary membrane filtration (TMF) pilot operating on secondary effluent and a membrane bioreactor (MBR) were setup in a side-by-side study as pretreatments for two identical RO pilot systems. The water quality of the permeate from both low-pressure membrane pretreatment systems, as well as the fouling rate of the RO systems was compared to assess the capabilities of the two low-pressure membrane pretreatments to prevent organic fouling of the RO systems. A consistent difference in water quality and RO performance was demonstrated during the 12-month study. The MBR permeate had significantly lower TOC, COD and polysaccharides concentrations, but higher colour and specific UV absorbance compared with the permeate from the TMF pretreatment. The differences in dissolved organics concentrations were found to be associated mainly with differences in the bioreactor process conditions. The pretreatment with the MBR gave an average RO fouling rate over the entire study (0.27 Lmh/bar/month) that was less than half the value found for the RO with TMF pretreatment (0.60 Lmh/bar/month). A correlation of RO feed TOC concentration with average RO fouling rate was also established, independent of the pretreatment method used. Results from a cleaning analysis, energy dispersive spectroscopy (EDS), scanning electron microscopy (SEM) and fourier transformed infrared reflectometry (FT-IR) confirmed that the foulants were primarily organic in nature. It is concluded that, for this type of application and setup, MBR systems present an advantage over tertiary membrane polishing of secondary effluent for RO pretreatment.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Keywords: RO fouling; RO pretreatment; Water reclamation; membrane bioreactor; membranes; organic fouling

Document Type: Research Article

Publication date: 2010-01-01

More about this publication?
  • Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed.

    A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

    WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
  • Subscribe to this Title
  • Membership Information
  • About WEF Proceedings
  • WEFTEC Conference Information
  • Learn about the many other WEF member benefits and join today
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more