Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1990-07-06
1993-03-02
Dawson, Robert A.
Liquid purification or separation
Processes
Ion exchange or selective sorption
210135, 210143, 210192, 210193, 210259, 210269, 210420, 210670, 210748, 210798, 210806, 422 24, 4221863, B01D 2446, B01D 4102, B01D 3600, B01D 3704
Patent
active
051906597
ABSTRACT:
An improved cross-flow granular filtration system involving the use of ultraviolet, ozonation, chlorination, reactive granular filtration media, chemical regeneration, and central flow control is described. The process system and apparatus includes a liquid pump, a central flow control, a cross-flow reactive pressure filter, a process tank and at least one chemical feeder. The filter media are of reactive and granular type, including diatomaceous earth, granular activated carbon, granular metal medium, greensand, neutralizing sand, activated alumina, ion exchange resins, polymeric adsorbents, coal, porous plastic medium, porous stainless steel medium, porous ceramic medium, bacteriostatic filter medium, or combinations thereof. Alternatively a downflow or upflow filter is substituted for the crossflow reactive pressure filter. The process tank contains and handles regeneration chemicals or filter aids for the reactive filter media. The process system is compact and simple, and cost-effectively removes suspended, dissolved, volatile and living contaminants from liquid.
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Kurylko Lubomry
Wang Lawrence K.
Wang Mu H. S.
Dawson Robert A.
Drodge Joseph
International Environmental Systems Inc.
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