We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Enhanced biological nitrogen removal and NO emission characteristics of the intermittent aeration activated sludge process.
- Authors
Sun, Yuepeng; Guan, Yuntao; Pan, Min; Zhan, Xinmin; Hu, Zhenhu; Wu, Guangxue
- Abstract
Enhanced biological nitrogen removal processes are necessarily required to cope with more stringent wastewater discharging regulations, especially for wastewater with low level of organic carbon to nitrogen ratios. The intermittent aeration activated sludge process has been received comprehensive attention over the past decades, due to its excellent performance in nitrogen removal and remarkable reduction of energy consumption. Recent advances for this technology was reviewed from aspects of characteristics of system, factors affecting nitrogen removal, nitrous oxide (NO) emission and its control, and application of the technology and its operation control. Finally, future development was proposed. In the intermittent aeration activated sludge process, aeration duration should be controlled for adequate nitrification and non-aeration duration should be adequate for complete denitrification, and these would benefit both nitrogen removal and NO mitigation. The step feed strategy could be applied to enhance the better utilization of influent organic carbon for nitrogen removal. Dissolved oxygen (DO) and aerobic duration both affected nitrogen removal in particular that via nitrite in the intermittent aeration process. Nitrite should be removed efficiently to avoid a high NO emission under both anoxic and aerobic conditions. Intermittent aeration activated sludge process has been applied in the treatment of various wastewaters, such as municipal wastewater, swine wastewater, anaerobic effluents and landfill leachate. For practical application, DO, pH and oxidation-reduction potential could be used as indices for controlling nitrogen removal and NO mitigation. Microbial ecology in the intermittent aeration activated sludge process should be specifically focused in future studies.
- Subjects
NITROGEN removal (Sewage purification); SEWAGE purification; SEWAGE disposal plants; DENITRIFICATION measurement; WATER aeration
- Publication
Reviews in Environmental Science & Biotechnology, 2017, Vol 16, Issue 4, p761
- ISSN
1569-1705
- Publication type
Article
- DOI
10.1007/s11157-017-9444-z