Method for the disposal of aqueous sewage sludge

Details Method for the disposal of aqueous sewage sludge Method for the disposal of aqueous sewage sludge

1992-07-22

1993-06-08

Theisen, Mary Lynn

Liquid purification or separation

Processes

Chemical treatment

55 97, 106624, 106724, 110341, 110345, 210769, 210770, 432 1, B01D 4300, B01D 4600

Patent

active

052176240

ABSTRACT:
A combination of a dehydration process for dehydrating sewage sludge by mixing a quicklime-containing material with the sludge, a cement conversion process for introducing the solids produced by the dehydration process into a cement kiln with other cement raw materials to yield cement, and a gas treatment process for introducing gases generated in the dehydration process into a cement burning process, thereby enabling conversion of the sewage sludge into cement without releasing wastes, with a reduction in fuel consumption for the cement burning, and a reduction in NOx content of the exhaust gas.

REFERENCES:
patent: 3963471 (1976-06-01), Hampton
patent: 4039649 (1977-08-01), Alagy et al.
patent: 4270279 (1981-06-01), Roediger
patent: 4295972 (1981-10-01), Kamei
patent: 4369194 (1983-01-01), Arsovic
patent: 4640681 (1987-02-01), Steinbiss et al.
patent: 4761182 (1988-08-01), Whitescarver et al.
patent: 4895665 (1990-01-01), Colelli et al.
patent: 4919722 (1990-04-01), Trivino Vazquez et al.
patent: 4997572 (1991-03-01), Wurtz

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