Challenges for Fall 2009 and Beyond

Current Subteam Leader: Rachel Philipson

Number of team members needed: 3-4

Important team member skills:

• Fluid Dynamics Background
• Self-motivated
• Curious student
• Eager to learn

Challenges

• Develop a way to theoretically model and calculate the particle size that will roll up the tube settler at a given flow rate and spacing

• Improve model of critical velocity with respect to floc roll-up with Matt and Monroe

• Run experiments to test floc roll-up utilizing ramp function and attempting to visualize failure (flow rate/critical velocity at which a majority of flocs begin to roll-up)

• Continue to investigate the effects of the velocity gradient in the tube settler by varying the floc density and plate settler spacing (change alum dose, change influent turbidity, add NOM)

• Investigate ways to optimize plate settler performance given changes in influent properties such as natural organic matter, pH, and alkalinity on floc performance and plate settler performance

• Continue to investigate the filter foam