Download Smith, M.A. "Functionalized nanoparticles as

o
•
Membrane type
and coatings
To start computer data collection:
o Run system at 7 Hz pump speed (6.4 Hz on controller)
o Set actuator valve to completely open (10 Hz)
o Start computer data collection (arrow button on top toolbar at left)
Write down file name and start time
.
• Turn ON actuator valve auto control. Make sure upper limit is set to 5 psi and lower
limit to 15 psi.
• Run at constant 1000-psi pressure and manually input Temperature reading at least
every 30 minutes. If temperature has not changed, input different temperature and
then return to actual temperature 1 minute later. When you are reading data, this
confirms that temperature was monitored although not changing.
o Check and record gauge pressure (just prior to Sepa cell):
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• Turn off program:
o Set actuator valve to completely open (10 Hz)
o Set pump to zero in Labview
o Turn OFF pump inverter to stop pump
o Use the STOP button on Labview screen to stop data recording.
•
Cleaning (must be done after fouling)
• The system should be sitting in DI from the previous run.
• Run the DI out until water level is just above pump.
After fouling:
• Fill small feed tank with 1 liter of pH 12 sodium hydroxide solution (0.4 g into 1 L)
• Run through for 10 minutes in recycle mode to remove foulants, then drain to just above
the level of the pump.
• Run through at least 20 L of DI water without recycle.
• Make sure conductivity of the exit stream ends at close to conductivity of DI water:
o Example: input of 25 mS DI water and output of 29 mS.
General maintenance:
• Fill small feed tank with 1 liter of 10% phosphoric acid (H3PO4) solution (117 ml of
85% H3PO4 added to DI water to make 1 liter).
• Run through for 20 minutes (10 minutes for H3PO4) in recycle mode to remove rust and
particulates. (Note that after adding to DI, the acid concentration is lower than 10%
and that is fine). Do not leave running much more than 20 minutes (15 minutes for
H3PO4).
• Run through at least 28-l of DI water, without recycle.
• Make sure conductivity of the exit stream ends at close to conductivity of DI water
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