Liquid purification or separation – Processes – Treatment by living organism
Patent
1991-06-11
1996-09-03
Wyse, Thomas G.
Liquid purification or separation
Processes
Treatment by living organism
210605, 210626, 210631, 134 26, 134 42, C02F 302, B08B 314
Patent
active
055520510
ABSTRACT:
A biochemical process system and apparatus for removal of toxic volatile organic compounds (VOCs), volatile inorganic compounds (VICs), heavy metals, and surfactants from contaminated soil, liquid and gas streams, by means of combined washing, pH adjustment, biochemical reaction, gas stripping, scrubbing, adsorption and regeneration is described. This process system involves soil washing with surfactant, soil-water separation, liquid pumping; liquid treatment using an enclosed gas stripping bioreactor and dissolved air flotation technology; gas purification using a foam collector, a wet scrubber and a self-regenerative gas-phase granular activated carbon (GAC) contactor; and recycling of GAC-purified gas for further liquid treatment by gas stripping and biochemical reactions. The process system is extremely cost-effective for removal of both volatile and nonvolatile pollutants from a contaminated site and eliminates the problem of secondary gas contamination caused by conventional air stripping towers.
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Hyrcyk Orest
Kurylko Lubomyr
Wang Lawrence K.
International Environmental Systems Inc.
Wyse Thomas G.
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