What Factors Affecting Water Quantity and Quality in RO Systems?

Q7 Factors that May Affect the Quantity and the Quality of the Water Produced

  1. PRESSURE. The greater the water pressure, the greater the quantity and better the quality of the water produced. Water pressure above 60 psi is ideal for systems without a booster pump. Using a system with a Puricom booster pump will ensure that the water pressure on the membrane remains above 60 PSI at all times.
  2. TEMPERATURE. 25°C (76°F) is the ideal water temperature for RO. If the water temperature is below 4°C (40°F) the production of RO will be about half that of water at 25°C (76°F). The maximum water temperature recommended is 35*C (95*F) to avoid damage to the membrane.
  3. TOTAL DISSOLVED SOLIDS (TDS). Generally, the TDS of tap/feed water will be under 500 ppm. (parts per million)  If the TDS is significantly above this, the amount of water produced will decrease. Because the amount of contaminants removed is a percentage of the feed water, a higher TDS feed water will also give a higher TDS product water. If the level of TDS in the inlet water is too high, the volume and quality of the product water can be improved by increasing the pressure on the membrane with a booster pump.
  4. MEMBRANE. Different membranes are designed for different contaminant rejections, production rates, and resistance to chemical deterioration. Puricom can supply the proper membrane for your feed water conditions and filtration needs.