Skip to main content

Fine-Pore Diffuser Studies in BNR Wastewater: Performance Variation and Effects on Energy Footprint

Buy Article:

$9.50 plus tax (Refund Policy)

Or sign up for a free trial

Fine-pore diffusers are the most common aeration system in municipal wastewater treatment plants. Fouling is inevitable and inexorable for all types of fine-pore diffusers, and is dependent on process layout, water quality, diffuser type, and time in operation, but independent of diffuser make and model. The decline in diffuser performance, resulting in increased aeration energy footprint is reflected onto the standard oxygen transfer efficiency (SOTE, ratio of oxygen transferred to the wastewater per unit oxygen blown by the aeration system, at standard conditions, %) and the net head loss across the membrane due the friction through the orifices, also known as dynamic wet pressure or DWP. In process water, the α factor is introduced to correct for the effects of wastewater, defining αSOTE(%). These parameters vary inevitably due to the fouling phenomena, with DWP increasing with time and SOTE decreasing. To account for the effects of fouling, a fouling factor F is introduced. Previously, we showed that the DWP increase is different for different materials, indicating different material properties and response with time in operation. Another indicator of diffuser performance is hence the pressure factor ψ (ratio of DWP for used and new diffusers). This paper presents our 2-year diffuser study results and discusses the implications of our results on aeration energy footprint.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Data/Media
No Metrics

Keywords: Aeration; activated sludge; energy; fine-pore diffusers; fouling; wastewater

Document Type: Research Article

Publication date: 2011-01-01

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 These proceedings are not peer reviewed.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