Method for dehydrating sludge

Details Method for dehydrating sludge Method for dehydrating sludge

1983-04-11

1985-10-22

Fisher, Richard V.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210733, 210734, 210735, 210506, 210770, 210778, B01D 2101, B01D 2900, B01D 3702

Patent

active

045487197

ABSTRACT:
A method for dehydrating sludge, and particularly sewage sludge, includes adding a particulate, thermally expanded volcanic material and a polyelectrolyte to said sludge prior to filtration, said volcanic material having a bulk density of less than 0.09 kg/liter and an average particle size ranging from 20 to 300 microns.

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patent: 3338828 (1967-08-01), Clark
patent: 3388060 (1968-06-01), Clark
patent: 3847806 (1974-11-01), Kuroiwa et al.
patent: 3932275 (1976-01-01), Mewes et al.
patent: 4007113 (1977-02-01), Ostreicher
patent: 4235795 (1980-11-01), Cohen
patent: 4440867 (1984-04-01), Sabherwal
Kirk-Othmer, Encyclopedia of Chemical Technology, vol. 14, Interscience, New York, pp. 910, 911, 929.
Kirk-Othmer, Encyclopedia of Chemical Technology, 3rd Edition, vol. 10, John Wiley & Sons, New York 322.
Pruchas, "Industrial Filtration of Liquds", 2nd. Edition, Leonard Hill, London, 1971, pp. 95, 105, 106.

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