Dewatering process and apparatus for slurry recovered from waste

Details Dewatering process and apparatus for slurry recovered from waste Dewatering process and apparatus for slurry recovered from waste

1985-10-11

1987-04-07

Terapane, John F.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210742, 210771, 210175, B01D 2101, B01D 3700, C02F 100

Patent

active

H00002585

ABSTRACT:
Process and apparatus for dewatering slurry recovered from waste water, generated in the production and treatment of metals, are provided in which the flocculated slurry is first dewatered mechanically to provide a water output which is returned upstream for further treatment, and a sludge output containing about 25-32 percent by weight (w/o) solids and the remainder free liquid. The sludge is passed through a thermal drier and, after substantially all the free water has been removed, is disposed of as desired.

REFERENCES:
patent: 4050390 (1977-09-01), Hara et al.
patent: 4133756 (1979-01-01), Arai et al.
patent: 4226712 (1980-10-01), Kamei
patent: 4321151 (1982-03-01), McMullen
patent: 4330411 (1982-05-01), Florin et al.
patent: 4358381 (1982-11-01), Takeuchi et al.
Thomas C. M.; "The Use of Filter Presses for the Dewatering of Sludges" J.W.P.C.F. vol. 43, No. 1 pp. 93-101, (Jan. 1971).

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