Research on N2O reduction technologies from sewage sludge incinerator
Abstract:Greenhouse gas from N2O, which is generated during the combustion process in sewage sludge incinerators, accounts for 20% of the greenhouse gas emitted from wastewater facilities. Since N2O has a high global warming potential of 310, it has a great impact even if the concentration level is low. In this report, we summarized the N2O reduction technologies by types, and investigated the benefits of implementation.
N2O is reduced by a two-step combustion process in bubbling fluidized bed incinerator (bubbling FBI) and circulating fluidized bed incinerator (circulating FBI). The two-step combustion process is a technology that promotes high-temperature pyrolysis of N2O by promoting pyrolysis with primary air and forming high temperature area with secondary air. Step grate stoker incinerator promotes high-temperature pyrolysis of N2O by drying dewatered sludge to raise the combustion temperature. This technology recovers heat from combustion effluent and uses it as heat source for drying.
Regarding the benefits of implementation, we studied N2O emission intensity, greenhouse gas emissions, and energy saving effect using data from actual facilities. From this study, it was confirmed that there is a high correlation between the maximum temperature inside the incinerator and the N2O emission intensity, regardless of the types or scales. It was also confirmed that the target N2O reduction technologies regulate the supplemental fuel usage.
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 These proceedings are not peer reviewed.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