REACTION TANK AND AERATION DEVICE

Title:

REACTION TANK AND AERATION DEVICE

Document Type and Number:

Japanese Patent JP2009106874

Kind Code:

A

Abstract:

To provide a reaction tank and an aeration device which can uniformize an effect of removing extraneous matter from an aeration hole, eliminate necessity of controlling the purchase cost of a chemical liquid, and wash the aeration hole by exerting no bad influence on treated water quality.

The reaction tank 24 comprises a plurality of flat membranes 28 immersed in the reaction tank 24, piping 30 for taking out treated water filtered with the flat membranes 28, an aeration pipe 10 installed below the flat membranes 28 and having a plurality of aeration holes 12, an injection device sending air for aeration into the aeration pipe 10, and an aeration device provided in the aeration pipe 10 and having a part for peeling off the deposited matter adhering to the aeration holes 12.

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Inventors:

KAGEYAMA KOJI
TAKEMOTO TAKESHI
HARA NAOKI
SUMIKURA MISAKI
YAMANOI ICHIRO

Application Number:

JP2007282597A

Publication Date:

May 21, 2009

Filing Date:

October 31, 2007

Export Citation:

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Assignee:

HITACHI LTD

International Classes:

C02F3/20; B01D63/08; B01D65/02; C02F3/12

Attorney, Agent or Firm:

Manabu Inoue
Yuji Toda

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