Skip to main content

THE ROLE OF RHODOCYCLUS-LIKE ORGANISMS IN BIOLOGICAL PHOSPHORUS REMOVAL: FACTORS INFLUENCING POPULATION STRUCTURE AND ACTIVITY

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

This research focused on PAO populations, especially those of Rhodocyclus-related PAOs, and their relationships to EBPR performance. For this purpose, a lab-scale sequencing batch reactor (SBR) and six full-scale wastewater treatment plants (WWTPs) performing EBPR were surveyed. Batch-scale acetate uptake and inorganic phosphate (Pi) release and uptake experiments were conducted to evaluate the EBPR activity of each sludge. Typical Pi and acetate profiles were observed and EBPR activity was found to be positively correlated to PAO abundance, as determined using 4',6-Diamidino-2-phenylindole (DAPI) to stain intracellular polyP. The abundance of Rhodocyclus-related organisms was investigated using fluorescent in situ hybridization (FISH). Rhodocyclus-related organisms were present in all full-scale EBPR plants, at levels ranging from 9% to 24% of total cells. The fraction of Rhodocyclus-related organisms with high polyP content (Rhodocyclus-related PAOs) was also determined. More than 84% of Rhodocyclus-related organisms were involved in EBPR in these six plants. However, Rhodocyclus-related PAOs were only a fraction (40%-70%) of the total PAO population, suggesting the involvement of non-Rhodocyclus-related PAOs in the full-scale EBPR plants. The variation of Rhodocyclus-related PAO abundance among plants suggests that multiple factors (e.g. plant configuration, BOD:TP ratio, chemical addition and solids retention time) may be acting hierarchically to structure PAO communities.
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: 2005-01-01

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 These proceedings are not peer reviewed.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