Revisiting BioSand filters, a type of water filter used in developing countries. Developing a concrete mold to slash costs from a quarter of a million dollars to around 200 dollars each using commonly found resources (wood and steel) as well as 3D-printing. Later revisions of the filter can bring the price as low as 5 dollars each.
Ying Wang, Designer, Printer, Concrete pourer
Computer Science & ECE, 2016