Liquid purification or separation – Processes – Treatment by living organism
Patent
1992-07-28
1994-03-29
Upton, Christopher
Liquid purification or separation
Processes
Treatment by living organism
210614, 210615, 210618, C02F 306
Patent
active
052981649
ABSTRACT:
An aerobic treatment of waste water is accomplished in such a manner as to effectively reduce the emission of volatile organic compounds contained therein by first re-introducing oxygen containing gas previously used in the process as supplemented with additional oxygen containing gas to fulfill make-up requirements during the operation. The reuse is effected in an enclosed vessel having a lower sparging compartment within which both a suitable quantity of mixed reused and make-up gas is thoroughly mixed with contaminated waste water being introduced therein for treatment. The thus humidified gas and preliminarily treated waste water are then moved upwardly within and through a central biological growth area, and the treated waste water is formed as a liquid level in an upper compartment and removed through a trap therefrom to maintain a water level therein and collect the resultant treated oxygen containing gas above the water level. A portion of the oxygen containing gas containing volatiles therein may be vented and the main portion that is released above the water level is continuously removed from a chamber area above the water level, and progressively mixed with a suitable quantity of make-up oxygen containing gas, and then introduced into the sparging chamber for continuing the operation.
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Hapach Gary S.
Karrs Stanley R.
Ondrusek Kenneth E.
United States Filter Corporation
Upton Christopher
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