A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Development of Simulation Model for a Combined Activated‐Sludge and Biofilm Process to Remove Nitrogen and Phosphorus
A simulation model was developed for a combined activated‐sludge and biofilm process that was developed in Japan to achieve nitrogen and phosphorus removal without extending existing treatment facilities. The process consists of an activated‐sludge process of three zones (anaerobic, anoxic, and aerobic) and a biofilm process in the form of fluidized media in the aerobic zone. In this process, nitrification is carried out by nitrifiers on the fluidized media and denitrification and phosphorus removal are performed by activated sludge. First, a biofilm model was developed by modifying components, biological processes, and detachment mechanism of an existing model using experimental results from the fluidized‐bed process. Second, the biofilm model was incorporated in the International Association on Water Quality Activated Sludge Model No. 2 with the addition of a mechanism of transferring detached biofilm to activated sludge. Parameter values of this model were fitted using data from a pilot plant during a period of no rainfall. The model was then evaluated with pilot‐plant data for a period of rainfall. The model developed for the combined activated‐sludge and biofilm process described water quality of the pilot plant well. Necessary improvements are also discussed.
Development of Simulation Model for a Combined Activated‐Sludge and Biofilm Process to Remove Nitrogen and Phosphorus
A simulation model was developed for a combined activated‐sludge and biofilm process that was developed in Japan to achieve nitrogen and phosphorus removal without extending existing treatment facilities. The process consists of an activated‐sludge process of three zones (anaerobic, anoxic, and aerobic) and a biofilm process in the form of fluidized media in the aerobic zone. In this process, nitrification is carried out by nitrifiers on the fluidized media and denitrification and phosphorus removal are performed by activated sludge. First, a biofilm model was developed by modifying components, biological processes, and detachment mechanism of an existing model using experimental results from the fluidized‐bed process. Second, the biofilm model was incorporated in the International Association on Water Quality Activated Sludge Model No. 2 with the addition of a mechanism of transferring detached biofilm to activated sludge. Parameter values of this model were fitted using data from a pilot plant during a period of no rainfall. The model was then evaluated with pilot‐plant data for a period of rainfall. The model developed for the combined activated‐sludge and biofilm process described water quality of the pilot plant well. Necessary improvements are also discussed.
Development of Simulation Model for a Combined Activated‐Sludge and Biofilm Process to Remove Nitrogen and Phosphorus
Suzuki, Yutaka (author) / Takahashi, Masahiro (author) / Haesslein, Markus (author) / Seyfried, Carl F. (author)
Water Environment Research ; 71 ; 388-397
1999-07-01
10 pages
Article (Journal)
Electronic Resource
English
Removal of nitrogen and phosphorus using a new biofilm-activated-sludge system
| British Library Conference Proceedings | 1996
Removal of nitrogen and phosphorus using a new biofilm-activated-sludge system
| British Library Conference Proceedings | 1996
Optimum operation conditions of nitrogen and phosphorus removal by a biofilm-activated-sludge system
| Online Contents | 2003
Nutrient removal using a combined process with activated sludge and fixed biofilm
| British Library Conference Proceedings | 1996
Nutrient removal using a combined process with activated sludge and fixed biofilm
| British Library Conference Proceedings | 1996