Process for dewatering sludges in filter presses

Details Process for dewatering sludges in filter presses Process for dewatering sludges in filter presses

1990-07-09

1991-12-24

Hruskoci, Peter

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210712, 210714, 210778, 210 961, C02F 1114

Patent

active

050750127

ABSTRACT:
To improve the dewaterability of sludge, which is dewatered in a dewatering device, in particular a plate filter press, a polymeric filter aid is added to the sludge. Since the flocs require a certain ripening time to form, a part stream of the unfiltered sludge is to be taken off according to the invention at the point opposite the feed and recycled into the main stream. The recycled flocs serve as flocculation nuclei. A further advantage of the sludge recycle is that the floc structure and/or size can then be scanned in the recycled part stream. The representative measured results are utilized for changing parameters which determine the dewaterability.

REFERENCES:
patent: 3502210 (1970-03-01), Busse et al.
patent: 4354947 (1982-10-01), Busse et al.
patent: 4655932 (1987-04-01), Roslonski
patent: 4675116 (1987-06-01), Hoyland
patent: 4861496 (1989-08-01), Diaz

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