Challenges for Summer 2009

Subteam Leader: Steve Mitchell

Work with the team Honduras to evaluate the current linear CDCs at the Tamara and Cuatro Comunidades.
Need to make the nonlinear mathCAD file more robust.
- Currently input plant flow rate and actual plant flow rate are not the same in the algorithm.
- Extend the range of the design below 6000 L/min. The doser works best at high chemical flow rates with a wide tube. Is there a way to increase chemical flow rates for plant flows below 6000 L/min without overdosing alum? ( e.g. decrease stock concentration- might create huge chemical stock tank however)

Figure out how the non linear CDC will fit into the overall plant design.
Design a higher density float for high plant flow rates.
- Consider connecting two different tubing sizes to accommodate for the distance the flow control module and the stock tank.
Run experiments to evaluate the materials being used i.e. flexibility of the tubing.
Test the flow ranges with varying tube lengths.

Modify the rapid mix mathCAD so that the flocculator first section baffle spacing is no longer a constraint on the orifice collector channel width. In other words modify the code so that an aspect ratio (channel width/water depth) is specified rather a fixed depth.