Liquid purification or separation – Processes – Treatment by living organism
Patent
1992-12-02
1994-01-04
Lithgow, Thomas M.
Liquid purification or separation
Processes
Treatment by living organism
210603, 210608, 210632, 210622, 210624, 210703, 210707, 210747, 210908, 210188, 2102212, 210256, 210748, C02F 124, C02F 120, C02F 302, C02F 900
Patent
active
052757323
ABSTRACT:
A high rate multi-stage bubble separation process is developed for: (a) initially generating coarse gas bubbles with diameters greater than 80 microns in turbulent hydraulic condition to mix an influent water with chemicals, enzymes, microorganisms, or combinations thereof, to produce chemical flocs, biological flocs or both, and to strip volatile contaminants from water; (b) subsequently terminating coarse gas bubbles and generating extremely fine gas bubbles with diameters smaller than 80 microns in laminar hydraulic condition to float suspended, oily and surface-active contaminants together with said chemical flocs and said biological flocs from water, to settle heavy contaminants from water, and to produce a clarified effluent water, a floating scum, and a sludge; (c) terminating the fine gas bubbles and discharging the clarified effluent water; (d) discharging the floating scum and the sludge upon demand; and (e) optionally collecting and treating an emitted gas stream resulting from said coarse gas bubbles and said fine gas bubbles.
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Kurylko Lubomyr
Wang Lawrence K.
Wang Mu Hao S.
International Environmental Systems, Inc., USA
Lithgow Thomas M.
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