Article ID: | iaor2004619 |
Country: | United States |
Volume: | 46 |
Issue: | 4/5 |
Start Page Number: | 99 |
End Page Number: | 106 |
Publication Date: | Jan 2002 |
Journal: | Water Science and Technology |
Authors: | Carucci A., Mola M. De, Rolle E., Smurra P. |
Keywords: | pollution |
Dealing with intermittent aeration as a useful practice to improve nitrogen removal efficiency of activated sludge plants, the possibility to plan optimal temporisation during daytime was investigated. A mathematical model (NIDEN) that allows us to manage different situations, with respect to influent load, environmental conditions and operating strategy, was then developed. The model represents a useful tool especially to plan the aeration cycles in small and medium sized plants, where high costs of automatic control through on-line instrumentation might not be justified. Once the input variables have been denied and the set-point values for tank nutrient concentration have been fixed, NIDEN gives an optimal phase temporisation, to obtain either the maximum energy saving or the best total nitrogen removal.