Liquid purifying system
OwnerVerity C. Smithinventor
Life of this patent
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Abstract
In a system for purifying liquid, a method is provided wherein the liquid is pretreated by passing it through a sand filter water softener and carbon filter for removal of hardness and particulate matter. The liquid is then pumped through a reverse osmosis membrane for removal of organic compounds and ionized and biological impurities. The liquid passes from the reverse osmosis membrane through a strong acid cation exchange resin for removal of the cations present in the reverse osmosis effluent. The acidified liquid is neutralized hy passing it through calcium carbonate, thus adding calcium salt and carbonic acid to the liquid for a better tasting, calcium-enriched product.
Claims23
A method for purifying liquid in a system comprising a portable liquid purification unit, said method comprising:
- a) passing a liquid through a sand filter;
- b) passing the effluent from a) through a carbon filter;
- c) passing the effluent from b) through a water softener;
- d) collecting the effluent from c) in a storage tank, from where said effluent is pumped into and through a reverse osmosis membrane;
- e) passing the effluent from d) through a strong acid cation exchange resin in the hydrogen form for acidifying the effluent;
- f) directly thereafter passing the effluent from e) through a bed of calcium carbonate for neutralizing the effluent;
- and
- g) collecting the effluent from f) in a second storage tank.
A system for purifying liquid comprising:
- a) means for passing a liquid through a series of filters, such as a sand filter, carbon filter or water softener;
- b) a storage tank into which the effluent from a) is collected and stored;
- c) a reverse osmosis membrane through which the effluent from b) is pumped;
- d) means for first acidifying effluent and then directly thereafter neutralizing effluent including, an acid cation exchange resin in the hydrogen form through which the effluent from c) is passed;
- and a bed of calcium carbonate through which the effluent from d) is passed;
- and
- e) a second storage tank into which the effluent from e) is collected and stored.
A method of producing a purified drinking water enriched with calcium comprising:
- a) passing the water through a cation exchange resin in the hydrogen form for acidifying the water;
- and
- b) directly thereafter passing the effluent from a) through a bed of calcium carbonate for neutralizing.
Dependencies are inferred from the claim text.