Floating Flocs Meeting Minutes

Spring 2009 Minutes

April 24, 2009

Working Group: Sand Filter

Accomplishments

• Improved the setup by using larger tubing in order to accomodate the higher flow rates
• Implemented the aeration apparatus (bubble chamber) to supersaturate the water entering the sand filter column; automated the setup again

Metrics

• Ran the experiment with Sand 40 (0.42 - 0.59mm) again at the different expansion levels
• Measured the actual flow rate coming out of the bubble collector for each run
• Performed a sugar test for each run

Outcomes

• Sugar test still shows that there is a lot of dissolved oxygen present in the water

Issues

• Need new glass column
• Problem with control pressure in bubble chamber
• Problem with restricting the air from escaping the chamber too quickly
• Problem with Control Processor although the average pressure is used