Sludge treating apparatus

Details Sludge treating apparatus Sludge treating apparatus

1981-08-28

1983-06-14

Castel, Benoit

Liquid purification or separation

Structural installation

Geographic

210179, 210180, 210181, 210216, 210218, 210603, 48197A, 435316, C02F 1104

Patent

active

043881866

ABSTRACT:
A sludge treating apparatus comprises a centrifugal condensing machine for forcedly condensing a raw sludge produced by a waste water treating apparatus. The raw sludge condensed to approximately 94 to 90% in terms of the percentage of moisture content by means of the centrifugal condensing machine is introduced into an anaerobic digestion tank of a deep well type, where the raw sludge undergoes an anaerobic digestion, and a digested sludge obtained from the anaerobic digestion tank is then dewatered by means of a dewatering apparatus such as a belt press, whereupon the dewatered sludge is applied to a post-treatment apparatus. In execution of the anaerobic digestion process, the reactions corresponding to an acid fermentation stage and acid regression stage may be carried out in advance in separate tanks and the reaction corresponding to an alkaline fermentation stage may be mainly performed in an anaerobic digestion tank.

REFERENCES:
patent: 3838199 (1974-09-01), Samis et al.
patent: 4022665 (1977-05-01), Ghosh et al.
patent: 4076515 (1978-02-01), Rickard
patent: 4100071 (1978-07-01), Beurer et al.
patent: 4203838 (1980-05-01), Shimizu et al.
patent: 4213857 (1980-07-01), Ishida et al.

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