Skip to main content

The Devil is in the Details: Full-Scale Optimization of the EBPR Process at the City of Las Vegas WPCF

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

To optimize the enhanced biological phosphorus (P) removal (EBPR) at the City of Las Vegas' Water Pollution Control Facility, the effects of dissolved oxygen (DO) level, hydraulic retention time in aeration basin and the operation mode of UCT versus A2O on phosphorus removal performance were investigated. DO levels in the range of 0.5 to 3.5 mg/L in the aeration basin did not have significant impact on effluent ortho-P concentration in a completely mixed basin within the EBPR process. Hydraulic retention time in the aeration basin was shown to affect effluent ortho-P concentration. Extending the aeration time beyond the aeration basin further reduced the ortho-P level; however, secondary P release occurred with excessive aeration timelength. Therefore, optimization of aeration time was beneficial to achieve the lowest P possible and eliminate secondary release. The UCT mode had better P removal performance than the A2O mode at LVWPCF. Bench-scale P release and uptake tests with sludge samples from the UCT process mode showed higher phosphorus removal rates and volatile fatty acids (VFAs) utilization efficiency than that from the A2O process. Measurement of P profiles in different zones within the EBPR process showed higher P release and uptake, which were consistent with bench tests results. Nitrite and nitrate levels in the anoxic zones in the A2O process were found to be higher than those in the UCT process. Quantification of poly-phosphate accumulating organisms (PAOs) in the two processes using fluorescence in situ hybridization (FISH) indicated the Rhodocyclus-like PAOs abundance in the UCT process was higher than that in the A2O process by about 17%.
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: 2006-01-01

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 These proceedings are not peer reviewed.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