SEWAGE TREATMENT METHOD AND SEWAGE TREATMENT APPARATUS

PROBLEM TO BE SOLVED: To provide a sewage treatment method which enables the alternate execution of not only aerobic treatment and oxygen-free treatment but also temporary aeration under a proper condition for the purpose of stirring at the time of oxygen-free treatment and the development of a stab...

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Bibliographic Details
Main Authors KONDO MUNEHIRO, YAMAMOTO MASASHI
Format Patent
LanguageEnglish
Published 12.10.2006
Subjects
CHEMISTRY
METALLURGY
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Summary:PROBLEM TO BE SOLVED: To provide a sewage treatment method which enables the alternate execution of not only aerobic treatment and oxygen-free treatment but also temporary aeration under a proper condition for the purpose of stirring at the time of oxygen-free treatment and the development of a stable nitrogen removing capacity, and a sewage treatment apparatus. SOLUTION: The sewage treatment apparatus 10 is equipped with a biological treatment tank 12 for biologically treating sewage by activated sludge and a blower 24 for sending air to an air diffuser 22 to alternately perform aerobic treatment for continuously driving the blower 24 and oxygen-free treatment for temporarily treating the blower 24 and also equipped with a sludge interface meter 16 for detecting the interface of sludge, a dissolved oxygen densitometer 18 for measuring the concentration of dissolved oxygen, a lifting device 20 for raising and lowering the sludge interface meter 16 and the dissolved oxygen densitometer 18 and a control unit 26 for controlling the temporary driving of the blower 24 on the basis of the measuring results of the sludge interface meter 16 and the dissolved oxygen densitometer 18. COPYRIGHT: (C)2007,JPO&INPIT
Bibliography:Application Number: JP20050098830