EN 
it
You might never have imagined that the graphite contained in a pencil could lead to an invention capable of identifying and eliminating harmful bacteria in water, but this is exactly what the winners of the 2017 Stockholm Junior Water Prize did. Here is how their fast-acting system might revolutionize the way water is tested and treated.
Ryan Thorpe and Rachel Chang have known each other since kindergarten. Now they are 17 and were recently awarded the Stockholm Junior Water Prize for a system that uses biosensors to identify individual colonies of four of the most common pathogens present in water.
