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26
Figure 18
System Recirculation Setup
Procedure
1. Fill the feed tank with required volume of water.
2. Direct the retentate and permeate lines into the feed tank.
3. Open the retentate and permeate valve.
4. Adjust the pump to deliver a flow rate of 5 L/min/m
2
(0.5 L/min/ft
2
).
5. Adjust the retentate valve to split flow 25% retentate, 75% permeate.
6. Readjust pump to give required retentate flow rate.
7. Recirculate for 30 minutes.
8. Direct retentate and permeate lines to drain.
9. Drain the system.
10. Repeat steps 1 to 7 two (2) additional times.
4.4.3
Flush the Retentate and Permeate Line to Drain
Volume Required:
40 L/m
2
(4.0 L/ft
2
) minimum
Retentate
Permeate
Feed
Tank
Feed
Pump
Rp
Pp
Fp