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Safe Sludge

Kara Nelson of the University of California, Berkeley in the U.S. proposes to disinfect excreta in latrines by converting the ammonia naturally found in urine and feces into a powerful disinfectant by adding an alkalinizing agent to raise the pH level. By killing pathogens immediately and turning excreta into "safe sludge," all subsequent activities required for excreta management become safer.

More information about Create the Next Generation of Sanitation Technologies (Round 6)

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The Bill & Melinda Gates Foundation is part of the Grand Challenges partnership network. Visit grandchallenges.org to view the map of awarded grants across this network and grant opportunities from partners.