Impact of Upstream Process on Ozone Demand and Disinfection Effectiveness
Abstract:Ozone's use in wastewater treatment has experienced new interest with additional disinfection requirements and the potential to remove compounds of emerging concern. One of the most critical aspects of its application is determining the ozone demand, which is important in sizing the system. The most significant factors that influence the ozone demand of wastewater effluent are chemical oxygen demand (soluble COD), inorganic oxidant demand (e.g. nitrite), influent bacteria density, and target effluent bacteria density. As regulations have been tightened and nutrient limits have been lowered, ozone demand has decreased and dosages as low as 5 mg/L can be used to meet a high-level of disinfection. The lower dosages, coupled with the advances in ozone generating and dissolution technology, have made ozone as a disinfectant for wastewater cost-competitive with UV. Results of an economic analysis of disinfection systems for a large midwestern WWTP indicated that the cost of ozone was only 17 percent higher than the cost of UV on a present worth basis.
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 These proceedings are not peer reviewed.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