Denitrification kinetics in anoxic/aerobic activated sludge systems
Nitrogen removal needs at municipal wastewater treatment plants (WWTPs) have increased due to greater concerns about eutrophication and increased interest in reuse of treated municipal effluents. Biological processes are the most cost-effective method for nitrogen removal. Biological nitrogen removal is accomplished in two distinctly different processes by the conversion of nitrogen in the wastewater from organic nitrogen and ammonia to nitrate, followed by reduction of the nitrate to nitrogen gas. Nitrate production occurs in an aerobic activated sludge treatment zone during a process called nitrification. The nitrate is then converted through a series of intermediate steps to nitrogen gas in an anoxic zone (an anaerobic condition with nitrate present) during a process called denitrification, effectively removing the nitrogen from the wastewater. Many different WWTP designs have been developed to incorporate these two conditions for nitrogen removal.
- Research Organization:
- Washington Univ., Dept. of Civil Engineering, Seattle, WA (United States)
- OSTI ID:
- 350355
- Report Number(s):
- AD-A-358621/XAB; TRN: 91020301
- Resource Relation:
- Other Information: TH: Thesis; PBD: 11 Dec 1998
- Country of Publication:
- United States
- Language:
- English
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