There was this guy at a TED event that mixed the filthiest, most disgusting glop I've ever seen, pushed it through a filter he invented and drank the resulting

There was this guy at a TED event that mixed the filthiest, most disgusting glop I've ever seen, pushed it through a filter he invented and drank the resulting water all onstage. He said it could even filter virus-sized particles out. Of course, I cannot find a link. I thought it was all very neat and practical, but never wondered if simpler chemicals such as drugs would pass through. Maybe they're diluted enough not to be an issue? As the article notes, we're already purifying sewage from cities upstream.