Skip to main content

Measuring and Modeling Ventilation in Wastewater Collection Systems

Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial

As part of the Water Environment Research Foundation study, Odor and Corrosion in Wastewater Collection Systems – Phase II, headspace ventilation was measured at four locations within the Los Angeles county and King County collection systems. A pulse tracer method was used to measure average air velocity within gravity sewer headspaces of pipes ranging in size from 24 to 96 inches. Additionally, related parameters affecting air movement were simultaneously measured in an effort to fully characterize ventilation within the subject pipes. Measured parameters included:

Wastewater depth and velocity


Wastewater temperature


Headspace air temperature and relative humidity


Temperature, relative humidity and velocity of air entering and leaving at manholes


Ambient air temperature, relative humidity and barometric pressure.


Ambient wind speed


This work is the first attempt to measure full-scale sewer ventilation simultaneously with all parameters influencing ventilation.

Additionally, three ventilation modeling technologies were evaluated and compared based on their accuracy in predicting the measured results. Based on observations of the strengths and weaknesses of each model, a new model was proposed which implements conservation of momentum and potentially accounts for several ventilation mechanisms including:

Liquid drag at the air/water interface


Buoyancy-induced ventilation due to air density differences


Eduction caused by wind blowing across openings to the sewer headspace


Pressurization from connected sewer components.


The paper will present the methodology, results, discussion and conclusions documenting the experimental work and model evaluation. An improved ventilation model will be proposed and current work to develop this new model will be discussed.
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: Collection System; Corrosion; Odor; Sewer; Ventilation

Document Type: Research Article

Publication date: 2010-01-01

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