Title:
METHOD FOR DEHYDRATING SLUDGE
Document Type and Number:
Japanese Patent JP3731740
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a sludge-dehydration process which efficiently dehydrates sludge, can cope with the seasonal variation in the nature of sludge and hardly dehydratable sludge, and exhibits a good performance for filtration and dehydration.
SOLUTION: The method is carried out by using the combination of an anionic water-soluble polymer with a mixture of (A) a cationic water-soluble polymer containing 5 to 100 mol% of one kind selected from specified cationic structural units and 0 to 95 mol% of a nonionic structural unit and (B) an amphoteric water-soluble polymer containing 5 to 70 mol% of one kind selected from the above cationic structural units, 5 to 50 mol% of a specified anionic structural unit and 0 to 90 mol% of a nonionic structural unit.
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Inventors:
Ryosuke Yonemoto
Jun Aiso
Jun Aiso
Application Number:
JP2001388908A
Publication Date:
January 05, 2006
Filing Date:
December 21, 2001
Export Citation:
Assignee:
Hymo Co., Ltd.
International Classes:
B01D21/01; C02F11/14; C08F2/16; C08F8/12; C08F20/34; C08F20/60; C08F26/02; C08F220/44; C08F226/04; C08F228/04; (IPC1-7): C02F11/14; B01D21/01; C08F2/16; C08F8/12; C08F20/34; C08F20/60; C08F26/02; C08F220/44; C08F226/04; C08F228/04
Domestic Patent References:
| JP2001286898A | ||||
| JP62015251A | ||||
| JP10249399A | ||||
| JP4166300A |
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