Method and apparatus for recirculation of liquids

Details Method and apparatus for recirculation of liquids Method and apparatus for recirculation of liquids

1991-12-11

1993-11-23

Wyse, Thomas

Liquid purification or separation

Processes

Treatment by living organism

210628, 210758, 2101953, 210208, 210219, C02F 322

Patent

active

052641309

ABSTRACT:
A waste liquid treatment system (10) includes an aeration chamber (10A) and a settling chamber (13). An aerator (11) is disposed within the aeration chamber (10A). A conduit (12) delivers liquid from the aeration chamber (10A) to the settling chamber (13). A gas pocket (P) is provided in the aerating chamber (10A), with at least a portion of the gas pocket (P) being situated beneath the liquid level line (L.sub.13) of the settling chamber (13). Conduits (18 and 19) are provided for delivering liquid from the settling chamber (13) to the aeration chamber (10A). The conduits (18 and 19) have respective outlets (24, 26) which empty into the gas pocket (P) at an elevation below the settling chamber liquid level line (L.sub.13). In one embodiment, a gas pocket (P) is provided in the interior of a tubular component (23) of the aerator (11). In another embodiment, a gas pocket (P') is provided beneath a concave hood (32) which traps gas bubbles (30) introduced into an aeration chamber (110A). In another embodiment, a baffle (32) is provided in the aeration chamber (210A) to provide a quiescent zone (33) wherein sludge is allowed to float and thicken for subsequent removal.

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patent: 3204768 (1965-09-01), Daniel
patent: 3385444 (1968-05-01), Dufornet
patent: 3682313 (1972-08-01), Abraham et al.
patent: 3709363 (1973-01-01), Smart, IV et al.
patent: 4211657 (1980-07-01), Etlin
patent: 4732682 (1988-03-01), Rymal

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