Floating Floc Meeting Minutes

Spring 2009 Minutes

March 13, 2009

Working Group: Bubbles

Accomplishments

• Wrote meeting minutes
• Midterm wiki
• Complete individual contribution pages

Metrics

• Ran experiments
• Spoke with Monroe
• Spoke with Len Lion about dissolved oxygen probe

Outcomes

• Found that DO probe is not working properly
• Gained a better understanding of how dissolved oxygen probe works
• Considering alternative solutions to floating floc problem

Issues

• DO probe definitely giving faulty data
• Data collected so far suggests this method may not work

Working Group: Sand Filter

Accomplishments

• Ran four experiments that vary in depth of sand and flow rate of water
• Obtained data that conflicts with previous data

Metrics

• Conflicts within data may be a result of the order in which the depth of the sand is changed
• The optimum flow rate is at 150 mL/min

Outcomes

• This week, the experiments showed that the higher the depth of sand, the better DO extraction performance is
• DO probe seems to be working because it shows a lower DO reading for the outflow than for the inflow (but needs to be calibrated each time an experiment is run)

Issues

• Possible solution is to let sand completely settle before running another experiment
• Should check that no bubbles are attached to the sand before running a new experiment
• Temperature probe jumps to 150 degrees C each time it is moved