Picture of William Tarpeh.William Tarpeh is a doctoral candidate in the Civil and Environmental Engineering program at UC Berkeley, where he spends several hours per day in a lab working with urine.

“Urine is pretty special because a lot of the nutrients found in it are the same nutrients found in fertilizers,” he said.

William is researching ways to extract those nutrients and repurpose them. He’s already developed an electrochemical cell that can extract nitrogen from urine, turn it into a gas, and combine it with water to make fertilizer. Next, he wants to develop a large-scale system for urine collection in sub-Saharan African countries. This could help grow crops to feed the hungry, while selling the fertilizer could fund more toilets in countries where sanitation systems are lacking....Read more about this Awesome CTYer.