Dynamics and control of an activated sludge process as a mixed culture system |
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| Authors: | Takeichiro Takamatsu Suteaki Shioya Hirokazu Kurome |
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| Affiliation: | Department of Chemical Engineering, Kyoto University, Kyoto, Japan |
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| Abstract: | One of the difficulties encountered in the operation of an activated sludge process is the phenomenon of bulking sludge. In an activated sludge process which is composed of a completely mixed aeration tank and a sedimentation vessel, the dynamic behavior of the system can be analyzed using a mathematical model. The model developed here is based on the kinetics and settleability of the combination of floc-forming sludge and bulking sludge. The operating conditions that cause the bulking phenomenon are clarified on the phase plane. It is also shown that a type of nonlinear state feedback regulator makes the system stable. |
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