Method for selective recovery and dewatering sewage sludge...

Details Method for selective recovery and dewatering sewage sludge... Method for selective recovery and dewatering sewage sludge...

2006-08-08

2006-08-08

Hruskoci, Peter A. (Department: 1724)

Liquid purification or separation

Processes

Treatment by living organism

C044S552000, C210S710000, C210S727000, C210S728000, C210S738000, C210S772000

Reexamination Certificate

active

07087171

ABSTRACT:
Disclosed herein is a method for dewatering sewage sludge by using sludge-coal-oil co-agglomeration (“SOCA”) which comprises the steps of physically, chemically or biologically conditioning sludge to impart hydrophobicity and lipophilicity to the sludge (conditioning step), supplying oil and coal to the conditioned sludge with stirring to form sludge-coal-oil agglomerates (agglomerating step), enlarging the particle diameter of sludge-coal-oil agglomerates (size enlargement step), and remaining the enlarged sludge-coal-oil agglomerates over a sieve to selectively separate them from hydrophilic materials dispersed in tailing water(screening step).According to the method, since sludge can be rapidly, easily and effectively dewatered and purified when compared to conventional sludge treatment methods. In addition, there is no risk of involving malodor and air pollution. Furthermore, the dewatered sludge can be utilized as a high-quality fuel.

REFERENCES:
patent: 2226532 (1940-12-01), Hawley et al.
patent: 3933634 (1976-01-01), Seki
patent: 4196077 (1980-04-01), Berkowitz et al.
patent: 4560391 (1985-12-01), Ashworth
patent: 4840736 (1989-06-01), Sander et al.
patent: 4874393 (1989-10-01), Mikhlin et al.
patent: 5051487 (1991-09-01), Bhattacharyya et al.
patent: 5125931 (1992-06-01), Schulz
patent: 5402946 (1995-04-01), Geiger et al.
patent: 5645614 (1997-07-01), Dummersdorf et al.

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