Antiscalant and SMBS Addition
WAVE provides the possibility for adding Antiscalants or SMBS (Sodium Meta-BiSulfite) in a similar manner to pH adjustment as shown below (and in Figure 1):
- Click on the Reverse Osmosis Tab if you are in a different Tab or Window.
- Select the Pass of interest (Pass 1 in WAVE).
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Click on the “Add Chemicals/Degas” button. The Chemical Adjustment Popup Window will appear. This Window includes options for adjusting pH, degasification, addition of Antiscalants/SMBS (only the 1st Pass), specifying the process temperature and Pass recovery. This Window also includes a Table with the Feed composition (before adjustment) and the Concentrate composition calculated by WAVE.
- Click on the “Anti-Scalant” and/or “SMBS” buttons. The gray dots on the buttons would turn green.
- Click on the entry fields for Anti-Scalant and/or SMBS and specify the desired composition in the Feed in mg/L. This would be reflected in the RO/NF/ROSC Process Flow Diagram after the user clicks
- “OK” (arrows in the feed streams to each pass with named chemicals).
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Choose the appropriate chemical from dropdown list for Antiscalant and SMBS and click “OK”.
Figure 1: Specification of RO/NF/ROSC System Antiscalant and SMBS Specification (a) Choosing “Add Chemicals/Degas” (b) Choosing Antiscalant/ SMBS (c) Specifying amounts and completion
Notes:
- WAVE does not consider the effect of the addition of Antiscalants and/or SMBS on the Feed or Concentrate composition.
- The addition of Antiscalants and/or SMBS can be deactivated by choosing the “Anti-Scalant” and/or “SMBS” buttons a second time. The green dots would turn gray.
- The list of chemicals for Antiscalants in defined by the user as shown in Section 1. Antiscalant manufacturers should always be consulted for the appropriate dosage of antiscalant.
- WAVE allows addition of Antiscalants and SMBS only in the 1st Pass and does not allow chemical addition between stages.