Title:
METHOD FOR TREATMENT OF SEWAGE SLUDGE
Document Type and Number:
Japanese Patent JP3680994
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for treatment of sewage sludge for improving dewatering property by concentrating sewage sludge partly, and mixing the rest raw sludge with the concentrated sludge.
SOLUTION: Cationic polymeric flocculant is added partly to sewage sludge, and the mixture is concentrated with a concentrator (3). The rest raw sludge is mixed with the concentrated sludge, and a small amount of cationic polymeric flocculant is added and mixed to the sludge to restore the flocculation property. The flocculated sludge is dewatered with a dehydrator (9) such as a force-feeding screw press. Thus, addition of the polymeric flocculant can be reduced, and water-content of cakes is reduced, treatment capacity is improved to attain an efficient dewatering treatment.
More Like This:
| JPH11169900 | TREATMENT OF HYDRATED CAKE |
| WO/2005/095291 | DEWATERING PROCESS |
Inventors:
Kenzo Sugaya
Application Number:
JP2001379572A
Publication Date:
August 10, 2005
Filing Date:
December 13, 2001
Export Citation:
Assignee:
Ishigaki Co., Ltd.
International Classes:
C02F11/14; B30B9/14; (IPC1-7): C02F11/14; B30B9/14
Domestic Patent References:
| JP59228905A | ||||
| JP7031999A | ||||
| JP8323399A | ||||
| JP8323400A | ||||
| JP59183896A | ||||
| JP5138200A |