2011 Task 7
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This team's task was to propose a way to disinfect drinking water in remote, rural locations. Their solution was to use sand filtration with a biolayer, the former of which cleans the particulates while the latter destroys the bacteria.

 

 
Unpacking boxes and setting thngs up.   All set up and ready to show things to anyone who might stop by.
     
     
 
A worker at the Las Cruces water treatment plants retrieves a sample of their filtration and bacterial cleansing water for the team to use to create their biolayer.   Visited by a judging team.
     
     
The full team and the two profs.