초록 ▼

Potable water from a municipal water supply is treated to remove suspended solids, organic and inorganic dissolved solids, dissolved carbon dioxide gas and metal contaminants so as to produce ultra-pure water in the 16 megohm-cm3 and greater range. The process involves prefilteration of the water; a

Potable water from a municipal water supply is treated to remove suspended solids, organic and inorganic dissolved solids, dissolved carbon dioxide gas and metal contaminants so as to produce ultra-pure water in the 16 megohm-cm3 and greater range. The process involves prefilteration of the water; activated carbon filtration; secondary guard filtration; double reverse osmosis treatment of the water. The process further involves the use of either an anion exchange or electrodialysis unit to remove further impurities from the water. A method for recycling part of the discharged water is also provided.

대표청구항 ▼

A method for purifying water comprising: prefiltering the water by passing it through a one to five micron filter; passing the water flowing from the prefiltration through an activated charcoal filter; passing the water from the activated charcoal filter through a second activated charcoal filter; p

A method for purifying water comprising: prefiltering the water by passing it through a one to five micron filter; passing the water flowing from the prefiltration through an activated charcoal filter; passing the water from the activated charcoal filter through a second activated charcoal filter; passing the water from the second charcoal filter through a guard filter, the quard filter beinq one to five microns in size: pressurizing the water from the guard filter to between 30 and 400 pounds per square inch by means of a first pressure pump: subjecting the water leaving the first pressure pump to a first reverse osmosis treatment to remove dissolved particles; pressurizing the water leaving the reverse osmosis treatment to between 0 and 400 pounds per square inch by means of a second pressure pump; subjecting the pressurized water from the second pressure pump to a second reverse osmosis treatment; and recycling the brine from the second reverse osmosis treatment to a ooint before the first reverse osmosis treatment.