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- Collected data from students who previously built the prototype filter to learn about the methods behind this design.
- Researched head loss calculating methods for flows through sand as well as bends, tees, expansions, and constrictions.
- Assisted in head loss and flow calculations in MathCAD to determine the locations of maximum head loss and possible modifications.
- Updated the MathCAD file as the prototype LFSRSF was modified.
- Assisted in determining the actual flow through the system by timing how long it takes the system's flow output to fill up a certain volume.
- Ordered parts for fabrication and assisted in all modifications to the LFSRSF (switched spring valves on the outlet pipes to swing valves, added a ball valve on the outlet side of the filter, and replaced the 1" diameter backwash pipe with a 1.5" diameter pipe.
- Ran hydraulic testing with and without sand to determine actual head losses experienced through the system.
- Assisted in setting up equipment for performance testing.
- Organized and analyzed results from performance tests, which showed that the filter can achieve up to a 99% removal rate.
The Fall 2012 LFSRSF Team created a working model of the LFSRSF that will be implemented in Honduras January 2013.