Liquid purification or separation – Processes – Ion exchange or selective sorption
Patent
1981-07-13
1984-06-12
Hruskoci, Peter A.
Liquid purification or separation
Processes
Ion exchange or selective sorption
210679, 210778, 210913, C02F 128, C02F 142
Patent
active
044540442
ABSTRACT:
A water treatment process for removing turbidity-causing impurities from water which involves contacting water containing such impurities with a relatively small amount of filter aid material, e.g., diatomaceous earth, for a time sufficient for impurities in the water to become adsorbed on said filter aid material, passing the water containing the filter aid material with impurities adsorbed thereon through a pre-filter having a flow rate of two liters/min./sq. m., or greater, and thereafter through a filter medium in the form of a porous, non-woven matrix consisting essentially of randomly arranged, irregularly intersecting and overlapping cellulose fibers intermixed with micro-bits of an expanded thermoplastic styrene-polymer or lower polyolefin, or of a flexible foamed polyurethane. The filter medium also includes one or more additional materials from the group of a fibrous wet web strengthening agent, a wet web support releasing agent a wet-strength enhancing agent and an adsorption agent selected from finely divided activated carbon, diatomaceous earth, colloidal alumina monohydrate and ion exchange resin. A system for carrying out the water treatment process is also disclosed.
REFERENCES:
patent: 1928398 (1933-09-01), Urbain
patent: 3077449 (1963-02-01), Kirk
patent: 3227650 (1966-01-01), Bell
patent: 3246767 (1966-04-01), Pall et al.
patent: 3252899 (1966-05-01), Rice et al.
patent: 3327859 (1967-06-01), Pall
patent: 3399136 (1968-08-01), Bell
patent: 3420709 (1969-01-01), Barrett et al.
patent: 3494826 (1970-02-01), Scheiber
patent: 3562154 (1965-02-01), Davis et al.
patent: 3658184 (1972-04-01), Davis et al.
patent: 4028233 (1977-06-01), Quentin et al.
patent: 4200679 (1980-04-01), Klein
patent: 4207378 (1980-06-01), Klein
patent: 4239516 (1980-12-01), Klein
patent: 4286977 (1981-09-01), Klein
patent: 4293378 (1981-10-01), Klein
patent: 4304873 (1981-12-01), Klein
Manual of Treatment Techniques for Meeting the Interim Primary Drinking Water Regulations, U.S. Environmental Protection Agency, Office of Research and Development, Cincinnati, Ohio May 1977, Revised Apr. 1978 pp. 37-42.
Drinking Water and Health, National Academy of Science, Washington, D.C., 1977 pp. 183-189.
LandOfFree
Water treatment process does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Water treatment process, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water treatment process will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-120510