METHOD FOR CONTROLLING OPERATION OF ACTIVATED SLUDGE CIRCULATION MODIFIED METHOD

PURPOSE:To provide the method for controlling operation of an activated sludge circulation modified method capable of improving nitrification efficiency in an aeration tank and enhancing denitrification effect in an anaeration tank according thereto. CONSTITUTION:This activated sludge circulation mo...

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Bibliographic Details
Main Author KUSUMI MIYOKO
Format Patent
LanguageEnglish
Published 27.01.1995
Edition6
Subjects
CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:PURPOSE:To provide the method for controlling operation of an activated sludge circulation modified method capable of improving nitrification efficiency in an aeration tank and enhancing denitrification effect in an anaeration tank according thereto. CONSTITUTION:This activated sludge circulation modified method treatment includes a stage for denitrifying raw water 3 by clenitrifying bacteria in the anaeration tank 1a, a stage for nitrifying the raw water in plural stages of aeration tanks 2a, 2b, 2c, 2d and a stage for subjecting the water to a sepn. of solid from liquid in a settling vessel 7. The aeration tanks are respectively arranged with pH meters 13a, 13b, 13c, 13d to measure the pH of the samples separately sampled from the respective aeration tanks. Whether the nitrification reaction is under progression or not or is already ended or not is judged. A controller 16 outputs control signals to properly control driving of a blower 5 and the opening degrees of respective blast rate regulating valves 15a, 15b, 15c, 15d from the results of the judgment.
Bibliography:Application Number: JP19930173475