We have developed a new intermittently aerated anaerobic-aerobic activated sludge process. This process employs 2 reactors connected in series, and is capable of controlling the duration of aerobic, anoxic and anaerobic conditions in both reactors by utilizing the ORP bending point, which corresponds to the termination of denitrification. One cycle of aeration and agitation takes approximately 120 minutes. In the 1st reactor, nitrification and phosphorus uptake occur in the aeration period, followed by denitrification and phosphorus release in the agitation period. In the 2nd reactor, nitrification and phosphorus uptake are conducted during aeration, and denitrification and weak phosphorus uptake during agitation. A one-year pilot plant experiment using sewage (22 m3/day) showed stable and high removal ratios of 98% for BOD, 92% for T-N, and 85% for T-P under conditions of HRT 20 hours and water temperature 9∼33°C.
Skip Nav Destination
Close
Close
Article navigation
Research Article|
July 01 1996
Development of 2-reactor intermittent-aeration activated sludge process for simultaneous removal of nitrogen and phosphorus
Kousei Sasaki;
Kousei Sasaki
*Water Treatment and Bioelectronic Laboratory, Fuji Electric Corporate Research and Development Ltd., 2-2-1 Nagasaka, Yokosuka City, Kanagawa, Japan
Search for other works by this author on:
Yasuji Yamamoto;
Yasuji Yamamoto
**Department of Environmental Sanitation, Osaka Prefectural Institute of Public Health, 1-3 Nakamachi, Higasinari-Ku, Osaka City, Osaka, Japan
Search for other works by this author on:
Kazushi Tsumura;
Kazushi Tsumura
***Division of Global Environmental Engineering, Faculty of Engineering, Kyoto University, Yosida, Sakyo-ku, Kyoto, Japan
Search for other works by this author on:
Sachiko Ouchi;
Sachiko Ouchi
†Central Research Laboratory, Unitika Ltd., 23 Ujikozakura, Uji City, Kyoto, Japan
Search for other works by this author on:
Yutaka Mori
Yutaka Mori
*Water Treatment and Bioelectronic Laboratory, Fuji Electric Corporate Research and Development Ltd., 2-2-1 Nagasaka, Yokosuka City, Kanagawa, Japan
Search for other works by this author on:
Water Sci Technol (1996) 34 (1-2): 111–118.
Citation
Kousei Sasaki, Yasuji Yamamoto, Kazushi Tsumura, Sachiko Ouchi, Yutaka Mori; Development of 2-reactor intermittent-aeration activated sludge process for simultaneous removal of nitrogen and phosphorus. Water Sci Technol 1 July 1996; 34 (1-2): 111–118. doi: https://doi.org/10.2166/wst.1996.0362
Download citation file:
Close
Citation
Kousei Sasaki, Yasuji Yamamoto, Kazushi Tsumura, Sachiko Ouchi, Yutaka Mori; Development of 2-reactor intermittent-aeration activated sludge process for simultaneous removal of nitrogen and phosphorus. Water Sci Technol 1 July 1996; 34 (1-2): 111–118. doi: https://doi.org/10.2166/wst.1996.0362
Download citation file:
Close
Sign in
Don't already have an account? Register
Client Account
You could not be signed in. Please check your email address / username and password and try again.
Impact Factor 1.638
CiteScore 2.9 • Q2
21
Views
0
Citations