Sauer Richard L. (League City TX) Colombo Gerald V. (Myrtle Creek OR) Jolly Clifford D. (Roseburg OR)
출원인 / 주소
The United States of America as represented by the Administrator of the National Aeronautics and Space Administration (Washington DC 06)
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초록▼
A method and apparatus are disclosed for maintaining continuous, long-term microbial control in the water supply for potable, hygiene, and experimental water for space activities, i.e., space shuttle, orbiter lab, Lunar base, Mars base, deep space missions, etc., as well as treatment of water suppli
A method and apparatus are disclosed for maintaining continuous, long-term microbial control in the water supply for potable, hygiene, and experimental water for space activities, i.e., space shuttle, orbiter lab, Lunar base, Mars base, deep space missions, etc., as well as treatment of water supplies on earth. The water purification is accomplished by introduction of molecular iodine into the water supply to impart a desired iodine residual. The water is passed through an iodinated anion exchange resin bed. The iodine is bound as I-n at the anion exchange sites and releases I2 into the water stream flowing through the bed. Suitable anion exchange resins are Amberlite IRA 401S (Rohm & Haas); Dowex SBR (Dow Chemical); and Ionac ASB-1P (Sybron Corp.). The concentration of I2 in the flowing water gradually decreases and the ion-exchange bed has had to be replaced. In a preferred embodiment, a bed of iodine crystals is provided with connections for flowing water therethrough to produce a concentrated (substantially saturated) aqueous iodine solution which is passed through the iodinated resin bed to recharge the bed with bound iodine. The iodinated resin bed has been recharged up to eight times during continuous use to permit an extended life to the system. The bed of iodine crystals is connected in parallel with the iodinated resin bed and is activated periodically, e.g., by timer, by measured flow of water, or by iodine residual level, to recharge the bed.
대표청구항▼
A method of treating water to produce a predetermined I2 residual therein comprising providing a bed of anion exchange resin iodinated to a selected iodine content, flowing water requiring purification through said iodinated anion exchange resin to remove iodine from said resin and produce said pred
A method of treating water to produce a predetermined I2 residual therein comprising providing a bed of anion exchange resin iodinated to a selected iodine content, flowing water requiring purification through said iodinated anion exchange resin to remove iodine from said resin and produce said predetermined I2 residual therein, continuing flowing said water through said bed of anion exchange resin until the effluent iodine content is reduced to a selected lower level, preparing an aqueous solution of I2, passing said solution through said bed to re-iodinate said resin to said selected iodine content, and flowing further amounts of water requiring purification through said iodinated anion exchange resin to remove iodine from said resin and produce said predetermined I2 residual therein.
Piechocki Duane (Pleasantville NY) Bormann Thomas J. (Melville NY) Gsell Thomas C. (Glen Head NY) Pascale Frank R. (Glen Cove NY) Matkovich Vlado I. (Glen Cove NY), Iodine disinfection method using a gaseous iodine treated porous medium.
Bridges,Michael A.; Kawai,Hiroyuki; Chen,Tay Yuan; Nichols,Everett J.; Williams,Jeffrey F.; McClure,Steven; Wetherbee,Jerry, Methods and articles for maintaining hydantoinylated polymers in a biocidally active state.
Giordano, Edward C.; Graves, Thomas W.; Jennings, James M.; Vander Berg, Mark; Storer, William James A.; Gibbs, Douglas R.; Lonsinger, Douglas A., Water treatment device with volumetric and time monitoring features.
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