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Dynamics and control of an activated sludge process as a mixed culture system
Author(s) -
Takamatsu Takeichiro,
Shioya Suteaki,
Kurome Hirokazu
Publication year - 1984
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690300304
Subject(s) - activated sludge , aeration , sedimentation , process (computing) , mixed liquor suspended solids , process dynamics , dynamics (music) , chemistry , waste management , process engineering , engineering , sewage treatment , computer science , physics , sediment , biology , paleontology , operating system , acoustics
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.