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The peristaltic pump near the Aguaclara desktop computer pumps alum from the plastic jug to the flocculation tank. This pump can be turned on and off, but its speed can be changed only by changing the "PAC dosing" in Process Controller. (See "Starting the alum pump" on the Troubleshooting Start-up page. if you need to know how to do this)
Process Controller Method
Download the Process Controller method created for PAC dosage here
Setup
PAC is used in much smaller amounts than Alum (less than 6 ml/min) so the Peristaltic Pump is set up with size #13 tubing so that the pump can run at a higher rpm and therefore dose more accurately.
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