An effluent treatment system and a method

Japanese Patent JP5947067

B2

PROBLEM TO BE SOLVED: To provide a drainage processing system and method capable of making supply of ozone for the purpose of improving a drainage processing capability by improving a biological treatment capability, improving sludge settleability by suppressing filamentous fungi propagation, preventing a bulking obstacle and reducing the sludge generation amount, compatible with sludge flow-out prevention using a membrane.SOLUTION: A drainage processing system for treating organic wastewater includes: an active sludge tank for biologically treating the organic wastewater which flows in while containing active sludge; an ozone supplying device which adds ozone to the active sludge within the active sludge tank; an immersion membrane tank which purifies the organic wastewater sent from the active sludge tank by means of an immersion membrane disposed within the tank; and a retention means which is provided in the middle of a path connected from the active sludge tank to the immersion membrane tank for retaining the organic wastewater sent from the active sludge tank to the immersion membrane tank for such a predetermined time or longer that the ozone concentration of the organic wastewater passing the immersion membrane becomes less than or equal to an allowable ozone concentration of the immersion membrane.

Zhang Book Court
Minehiko Sato
Noriaki Okamura

JP2012055679A

July 06, 2016

March 13, 2012

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Takasago Thermal Engineering Co., Ltd.

C02F3/12; B01D53/34; C02F1/20; C02F1/44

JP2001191097A
JP2009507625A
JP2002306930A
JP2001047082A
JP2001524866A

US20110100911

Yoshiyuki Kawaguchi
Hidemi Matsukura
Katsuhiko Imahori

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