Skip to main content


Buy Article:

$17.50 plus tax (Refund Policy)

Or sign up for a free trial


A real-time odor monitoring system was developed to evaluate and predict odors levels of dewatered solids generated by the District of Columbia Water and Sewer Authority's (DCWASA) advanced 370 mgd wastewater treatment plant (WWTP) in Washington, DC. Each year, DCWASA generates over 400,000 wet tons of biosolids and recycles these biosolids by applying them to over 20,000 acres of agricultural land. Nuisance odors from recycling biosolids on land may drift into surrounding neighborhoods and result in neighboring communities enacting legislation to ban land application, therefore, the reduction of odor emissions from biosolids recycled on field sites is a major concern.

Odor levels generated by dewatered solids were measured as total volatile reduced sulfur compounds with an online electro-chemical headspace monitoring device. These volatile reduced sulfur compounds comprise a major component of odors generated by wastewater treatment processes. The study correlates odor levels of dewatered biosolids to various operational parameters throughout the wastewater treatment process and forecasts total volatile reduced sulfur odor emissions of dewatered solids prior to recycling on agricultural fields.

The model developed by this study indicates that the secondary blanket depth is the most significant factor for odor level of dewatered solids and that blanket depths more than 1.8 ft will cause a significant increase in odors. This model also found that polymer addition increases during the dewatering process as the odor and septicity of the dewatered solids increases.

Document Type: Research Article


Publication date: 2007-01-01

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 These proceedings are not peer reviewed.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