Skip to main content

Odor Control Plan for Large Gravity Sewer Interceptors

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

Abstract:

The Sub-Regional Operating Group (SROG) is a five-city partnership formed to facilitate the joint ownership and operation of a wastewater conveyance and treatment system in the Phoenix metropolitan area. The cities of Glendale, Mesa, Phoenix, Scottsdale, and Tempe are party to this partnership, which applies to a jointly owned regional wastewater treatment plant (WWTP) and two major interceptors. These two interceptors, Salt River Outfall (SRO) and Southern Avenue Interceptor (SAI), run parallel, east-west collecting wastewater to be ultimately conveyed to the regional 91st Avenue WWTP, located in the southwest corner of the Phoenix area. The SRO and SAI interceptors are each over 20 miles long with pipe sizes ranging from 48 to 90 inches in diameter. As a result of wastewater temperature, travel time, and development, the numbers of odor complaints are rising from residents near the interceptors. SROG conducted odor studies for both interceptors in the year 2003. The studies recommended implementation of odor control facilities to exhaust and treat the headspace foul air at several locations along the interceptors. Odor control measures are in the concept stage and have not yet been implemented.

In recent studies, between 2005 and 2007, SROG has identified hydraulic capacity limitations in the SRO and SAI interceptors that may compromise their conveyance efficiency under both dry- and wet-weather conditions. A study is currently being conducted to identify regional municipality specific solutions to manage the interceptor capacity issues. The solution is anticipated to include a combination of measures aimed at reducing inflow and facilities that will permit a controlled discharge of wastewater into the interceptors. As a result, a relatively steady wastewater flow is expected to be achieved in the interceptors. This new flow regime and its impact on pipe headspace air volume are discussed in the paper.

Wastewater flow variations in a sewer pipe go accompanied with fluctuations of the headspace air volume. These volume fluctuations increase the potential for sewer headspace pressurization during wastewater level rises, increasing the potential for odor release out of the interceptor (sewer out-gassing). The paper concludes that wastewater and rainfall derived inflow and infiltration (RDII) management programs, typically focused on optimizing the hydraulic capacity of collection systems, should be expanded to include an assessment of their impact on odor release potential along the collection system. Odor generation and headspace air transport modeling should be run in parallel with the system hydraulic model so that appropriate decisions can be made to solve sewer pipe flow capacity and odor release issues in a concerted effort.

Document Type: Research Article

DOI: https://doi.org/10.2175/193864708788807772

Publication date: 2008-01-01

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