Method and apparatus for increasing sludge concentration in wate

Details Method and apparatus for increasing sludge concentration in wate Method and apparatus for increasing sludge concentration in wate

1990-09-21

1992-03-24

Silverman, Stanley S.

Liquid purification or separation

Processes

Treatment by living organism

210625, 210630, 210903, 210906, C02F 330

Patent

active

050985728

ABSTRACT:
A method of treating water with activated sludge, comprising a process for depolluting said water including a stage in which carbon pollution is oxidized, a nitrification stage which may optionally be associated with a denitrification state and/or a dephosphating stage, and a sludge ageing process. The method further includes a sludge concentration stage, said stage being performed upstream from the sludge ageing stage, said concentration being performed by phase separation using compressed air, e.g. in a flotation tank (3), and the concentrated sludge being recycled via the sludge ageing stage.

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Degremont, Memento Technique De L'Eau, 1972, pp. 321-323.
Abwassertechnische Vereinigung, Lehr-und Handbuch der Abwassertechnik, p. 237.

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