Zero-Cost Operational Modifications Reduce Effluent Nitrogen and Chemical Consumption at the OWASA Mason Farm WWTP
OWASA owns and operates the 55 ML/day Mason Farm Wastewater Treatment Plant, which will be required to meet strict TN mass load allocations starting in 2018. The existing secondary process provides limited denitrification, and OWASA will be dependent on denitrification filters to meet the standard under historical operations. Operation of the aeration basins as a step feed process, which could be made at zero capital cost, was identified to reduce secondary effluent TN and chemical consumption. Step feed operation commenced in June 2010, and OWASA immediately observed a 50% reduction in effluent TN. Alkalinity feed has been reduced by 55%, and alum and acetic acid feed have been reduced by 25% and 33%, respectively, since implementation of step feed, resulting in 260,000/year of chemical savings. Operation in the step feed mode of operation is expected to save over 800,000 per year over 20 years once the strict TN limit is in force.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
Publication date: 2012-01-01
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 These proceedings are not peer reviewed.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