Skip to main content

BIOMEMBRANE ACTIVATED SLUDGE PILOT TESTING RESULTS FOR AN AIRCRAFT WASHRACK WASTEWATER

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

Recent modifications to the aircraft paint stripping and washing operations performed at this aircraft washrack resulted in significant changes to the characteristics of the process wastewater that is generated. This washrack wastewater stream is the primary contributor of both organic and heavy metal loads at the facility's Industrial Wastewater Treatment Plant (IWTP).

Following characterization of the wastewater and establishment of the design basis, an evaluation of alternatives led to the conclusion that biomembrane activated sludge appeared to be the most suitable treatment alternative for this wastewater. Biomembrane activated sludge is activated sludge treatment coupled with ultrafiltration membrane separation of mixed liquor suspended solids (MLSS). Pilot testing was performed to confirm the applicability of the process and to facilitate development of operating parameters and design parameters for a full-scale system.

After a period of acclimation, the biomembrane activated sludge pilot test unit demonstrated it could produce a high quality effluent that exceeded the discharge requirements. Removal efficiencies for total toxic organics (TTO), chemical oxygen demand (COD), biochemical oxygen demand (BOD), and total organic carbon (TOC) were each greater than 98 percent. There were no signs of incompatibility between the membrane and the washrack wastewater. Membrane flux rates were sustained at 10 gallons per square foot per day with little increase in operating pressure. The effluent total suspended solids (TSS) concentrations were less than 1 milligram per liter (mg/L). Long solids residence times (SRTs) were achievable in this activated sludge system because the use of an ultrafiltration membrane for final solids separation resulted in low observed yields without concern for the settleability issues associated with conventional activated sludge systems.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Document Type: Research Article

Publication date: 01 January 2001

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