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William Tarpeh is an Assistant Professor of Chemical Engineering at Stanford University. During his graduate studies, Tarpeh invented a process to extract nitrogen from urine and convert it to fertilizer. He was named one of Forbes Magazine's "30 under 30" scientists in 2018, and NBCBLK's "28 under 28" African-American Innovators.

Education
Tarpeh received a bachelor's degree in Chemical Engineering from Stanford University in 2012. He completed his doctoral studies in Environmental Engineering at University of California, Berkeley, in 2017 where he was advised by Professor Kara Nelson. He received the National Science Foundation Graduate Research Fellowship, Ford Foundation Predoctoral Fellowship, and the UC Berkeley Chancellor's Fellowship to support his studies. After completing his Ph.D., he conducted postdoctoral studies at University of Michigan.

Professional career
Tarpeh's research studies processes to recover resources from waste water.