Skip to main content


Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

During more than one year of successful pilot testing of a new integrated membrane-anaerobic stabilization (IMANS) system for wastewater treatment and water reclamation, microfiltration of primary effluent was demonstrated to produce a high quality effluent suitable for ocean discharge. The success of the pilot work prompted the Orange County Sanitation District (OCSD) to embark on a second phase project to investigate the performance of microfiltration of primary effluent at a larger scale.

A major concern for the OCSD is management of peak flows. While the District has two ocean outfalls to discharge treated wastewater, the shorter of the two is not currently in regular use because it discharges closer to the shoreline and requires a significantly higher quality effluent. Regular use of the “short” ocean outfall could save the District millions of dollars by delaying the need to build another deep-water outfall. In addition to the flow management issues, the District is also facing the need to renew its discharge permit. Permit renewal is coupled with public pressure for the District to implement full secondary treatment prior to ocean discharge, instead of the current approach of discharging a 50:50 blend of primary and secondary treated effluent. To meet the needs for higher quality effluent, microfiltration of primary effluent is one alternative that the District is now considering.

Four months of continuous operation of the larger scale (200 gpm) microfiltration plant treating enhanced primary treated wastewater has confirmed the positive results observed during the pilot plant work. Excellent solids and bacterial removals were achieved, with negligible evidence of long-term (irreversible) fouling of the membranes. Operation of the plant continues.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Document Type: Research Article

Publication date: 2002-01-01

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 These proceedings are not peer reviewed.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
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