Feed Bypass
To meet permeate quality requirements, it might be necessary to bypass a given Pass and mix the bypassing portion of the Feed with the Permeate from that Pass. WAVE makes this possible using the steps below (as shown in Figure 1 and Figure 2):
- Click on the Reverse Osmosis Tab if you are in a different Tab or Window.
- Click on any entry field in the Flow Specification area (shown in Figure 1). The Flow Calculator Pop-up Window will appear.
- Select the “Bypass” radio button for the Pass of interest.
-
Specify the % Bypass (% of total feed to the Pass that bypasses that Pass and becomes part of the Feed of the next Pass or becomes part of the RO/NF/ROSC product). The System Recovery would be automatically calculated and displayed in the ‘RO System recovery’ box at the top right corner of the Flow Calculator Pop-up Window. However the RO/NF/ROSC Process Flow Diagram would not update until the user clicks “OK”.
Figure 1: Specification of RO/NF/ROSC system Feed Bypass to Product Before
Notes:
- In WAVE, the user can specify the % of the Feed stream to recycle, not the amount. However, WAVE automatically calculates the corresponding bypassing stream flow and displays it underneath the % specification fields.
- In WAVE the user can remove the Bypass stream by clicking on the radio button next to “None” at the top right corner of the Pass Optimization box.
- WAVE always mixes the bypassing Feed stream and the Permeate from the Pass.