Defining the Advanced Regeneration Conditions

WAVE makes possible specification of additional regeneration conditions in the Advanced Regeneration Window, as shown below in Figure 1. The Advanced Regeneration Window is hidden by default but can be displayed by clicking on the ‘More’ button as shown in below in Figure 1. The following variables can be specified in WAVE: Backwash Frequency, Backwash Expansion, Backwash Duration, Compaction Duration, Regeneration Specific Velocity, SBA/SAC Regeneration Flow Ratio, Regeneration Hold-Down Factor, Displacement Rinse Flow, Displacement Rinse Volume, Fast Rinse Volume, Fast Rinse Recycle, and Settling Duration.

• Backwash Frequency - Number of cycles between 2 consecutive backwashes. This option is displayed as MB Separation Backwash Frequency only for the Mixed Bed (IXMB and IXCP Process).
• Backwash Expansion - Percentage expansion for the ion exchange bed. This option is displayed as MB Separation Backwash Expansion only for the Mixed Bed (IXMB and IXCP Process).
• Backwash Duration - Time specified for backwash. This option is displayed as MB Separation Backwash Duration only for the Mixed Bed (IXMB and IXCP Process).
• Compaction Duration
• Regeneration Specific Velocity: WAVE allows the user to specify the specific velocity for the different regenerants. Note: For the IXMB Process:
  • –    for internal regeneration the user is able to modify the regeneration specific velocity for cation resin. Anion specific velocity will be calculated based on the specific cation velocity, SBA/SAC regeneration flow ratio and resin volume. Anion linear velocity (m/h) = cation linear velocity (m/h) x SBA/SAC regen flow ratio.
  • –    for external regeneration the user is able to modify the regeneration specific velocity for both cation and anion resin.
• SBA/SAC Regeneration Flow Ratio (this variable is only displayed for IXMB and IXCP Process)
• Regeneration Hold-Down Factor
• Displacement Rinse Flow
  • –    @ regeneration flow: the same flow used during regeneration (regenerant + dilution water) will be used for displacement rinse.
  • –    @ dilution flow: the dilution water flow used during regeneration will be used for displacement rinse.

  Note:  The dilution flow will always be smaller than the regeneration flow.

• Displacement Rinse Volume: After the specified quantity of regenerant has been introduced, the regenerant chemical injection is stopped and only the dilution water continues to be injected to displace the regenerant.
• Fast Rinse Volume: Fast final rinse is carried out at service flow rate and direction until the required effluent quality is obtained
• Fast Rinse Recycle: WAVE gives the option to rinse to waste or to recycle the fast rinse.
  • –     None: Rinse to waste.
  • –    After 3 minutes: 3 min of rinse to waste prior to recycle.
  • –    Full: All the water used during the Fast Rinse step will be recycled.