SUCTION FILTRATION/CONCENTRATION METHOD AND SUCTION FILTRATION/CONCENTRATION DEVICE

WIPO Patent Application WO/2010/150790

A1

Disclosed is a suction filtration/concentration method for filtrating and concentrating suspension by a suction method, which comprises a step in which water content in the suspension is passed through filter cloth (18) in the shape of a bag by sucking the suspension through a filtering chamber (76) formed in the interior of the filter cloth (18), while solids in the suspension are attached to the surface of the filter cloth (18). The suction filtration/concentration method has a step for selecting first suspension containing solid content capable of blocking the mesh of the filter cloth (18), a cake thin layer forming step for forming a cake thin layer on the surface of the filter cloth (18) by filtrating and concentrating the first suspension by the suction method, and a filtration/concentration step for filtrating and concentrating second suspension having concentration lower than the concentration of the first suspension through the cake thin layer by the suction method. The method and a device therefor make it possible to concentrate sludge of low concentration of not more than 1% by mass, which is produced in a filter plant or the like, in a short time and in an efficient manner.

JP6709542	Operation control method for immersion type screw press
JP6055396	Length type screw press type filter

KUNITANI TADASHI (JP)

PCT/JP2010/060574

December 29, 2010

June 22, 2010

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METAWATER CO LTD (JP)
KUNITANI TADASHI (JP)

B01D29/25; B01D29/00; B01D29/13; B01D29/37; B01D35/22; B01D36/04; C02F11/121

JP2003144857A	2003-05-20
JP2004283659A	2004-10-14
JPS57174112A	1982-10-26

WATANABE, Kazuhira (JP)
Ippei Watanabe (JP)

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