Title:
SUCTION FILTRATION/CONCENTRATION METHOD AND SUCTION FILTRATION/CONCENTRATION DEVICE
Document Type and Number:
WIPO Patent Application WO/2010/150790
Kind Code:
A1
Abstract:
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.
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Inventors:
KUNITANI, Tadashi (3-1, Toranomon 4-chome, Minato-k, Tokyo 29, 〒1056029, JP)
Application Number:
JP2010/060574
Publication Date:
December 29, 2010
Filing Date:
June 22, 2010
Export Citation:
Assignee:
METAWATER CO., LTD. (3-1 Toranomon 4-chome, Minato-ku Tokyo, 29, 〒1056029, JP)
メタウォーター株式会社 (〒29 東京都港区虎ノ門四丁目３番１号 Tokyo, 〒1056029, JP)
メタウォーター株式会社 (〒29 東京都港区虎ノ門四丁目３番１号 Tokyo, 〒1056029, JP)
International Classes:
B01D29/25; B01D29/00; B01D29/13; B01D29/37; B01D35/22; B01D36/04; C02F11/12
Attorney, Agent or Firm:
WATANABE, Kazuhira (3rd Fl, No.8 Kikuboshi Tower Building 20-18, Asakusabashi 3-chome, Taito-k, Tokyo 53, 〒1110053, JP)
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