Title:
DEHYDRATION METHOD FOR ORGANIC SLUDGE UTILIZING SLUDGE INCINERATION ASH
Document Type and Number:
Japanese Patent JP3731158
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To suppress the increase in incineration ash of a dehydrated cake by reducing the amount of an inorganic flocculant to be used enhancing the dehydration properties of organic sludge.
SOLUTION: This dehydration method includes a step (a) for adding a slurry, which is obtained by adding incineration ash of organic sludge to an acid aqueous solution with pH 2 or less and an inorganic flocculant to organic sludge, a step (b) subsequently adding an organic polymetic flocculant and a step (c) for dehydrating the obtained organic sludge.
Inventors:
Masago Okamoto
Hiroshi Nishiguchi
Fumio Nishizawa
Akinori Hachiya
Hiroshi Nishiguchi
Fumio Nishizawa
Akinori Hachiya
Application Number:
JP2002244864A
Publication Date:
January 05, 2006
Filing Date:
August 26, 2002
Export Citation:
Assignee:
Daiichi Kogyo Pharmaceutical Co., Ltd.
Tokyo Metropolitan Sewerage Service Co., Ltd.
Tokyo Metropolitan Sewerage Service Co., Ltd.
International Classes:
B01D21/01; C02F11/14; (IPC1-7): C02F11/14; B01D21/01
Domestic Patent References:
| JP47028761A | ||||
| JP51102352A | ||||
| JP2001334105A |
Attorney, Agent or Firm:
Akaoka Michio
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