| Currently the city of El Paso is dependent solely on well water during the winter (nonirrigation season). By treating irrigation return flows at the canal street water treatment plant and using membrane post treatment to remove excess sulfate, another source of water could be utilized.; By using a nanofiltration membrane, it was possible to remove divalent ions including sulfate. The membrane removed in excess of 80% of the sulfate ions, allowing for the blending of the permeate water with various amounts of other water.; The cost of the product water would vary from {dollar}0.65/1000 gallons to {dollar}1.08/1000 gallons, depending on the quantity of water treated, the amount blended and the source of the blended water. |
