The Regenerant Dose

The Regenerant Dose section allows the user to specify the following parameters for the cation and the anion resins (as well as for the different regeneration steps when appropriate, i.e. Brackish softening with WAC (H/Na)):

• Safety Factor: the lower the value, the higher the safety is being taken. The higher the value, the smaller the safety is being taken.

  In this screen the user’s input would be the minimum safety factor accepted. The final safety factor used will be based on the following: Effective Operating Capacity / Theoretical Operating Capacity (appears in the report as Operating Capacity).

  Effective operating capacity is the total ionic load divided by total resin volume. As resin volume can be adjusted for resin packaging sizes for example, the effective operating capacity will be equal or lower than theoretical operating capacity. Therefore, final safety factor value will be equal or smaller than user’s safety value input (meaning that always the same or more safety will be finally taken).

  Note:  If the user manually enters a volume on the Final Parameter Adjustments screen (see Section ‎7.13) less than what WAVE computed, it is possible to get an actual safety factor greater than the user’s input. In that case, WAVE will include a warning in the project report.

• WAC Overrun/WBA Overrun: amount of ionic load carried over from the WAC to the SAC resin or from the WBA to the SBA when the “Manual” option is selected in the Overrun Computation box (see Section 7.11.4 for more details).

• Regenerant Dose: mass of regenerant 100% pure per volume of SAC (or SBA) resin in reference form.

• Regeneration Ratio: level of regeneration expressed in percentage of the WAC (or WBA) operating capacity (e.g. 115 % Regeneration Ratio on a WAC means that a quantity of H+ ions equal to 1.15 time the quantity of ions fixed on the resin will be used).