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KMID : 1024519990080040533
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Journal of the Environmental Sciences
1999 Volume.8 No. 4 p.533 ~ p.538
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Fuzzy algorithm of Automatic control for dissolved oxygen in Activated sludge aeration tank
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Sohn Keon-Tae
Kim Sung-Duk
Ko Joo-Hyung
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Abstract
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Fuzzy algorithm of automatic control for dissolved oxygen(DO) concentration in the aeration tank of an activated sludge process is proposed. Among variables repirometry and air flowrate are selected as significant input factors and the relationship with DO is estimated using a multiple regression model. The DO concentration and the amount of repirometry are fuzzified and the fuzzy rule base are determined. Using the fuzzy algorithm, the change of amount of air flowrate are determined and the change of amount of DO is derived.
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KEYWORD
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DO control, Activated sludge process, Fuzzy controller
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