How safe is it to use compost made from treated human waste?

Treated human waste has been used on farmland for decades, but the ick factor has not entirely faded. Some environmentalists think the treatment process may not get rid of all the harmful contaminants that could be in the waste. read more

: The Salt Treated human waste has been used on farmland for decades, but the ick factor has not entirely faded. Some environmentalists think the treatment process may not get rid of all the harmful contaminants that could be in the waste. read more

In addition to what Elias said, human waste can be treated as vermicompost; composting red worms will turn it into a rich safe compost using their own set of biota to break down human waste and outcompete pathogens. read more

Raw waste is, of course, nasty stuff until all the dangerous bacteria have been killed off, either by heat or anaerobic digestion. But the sludge was still piling up in landfills, so scientists began testing how to use it in agriculture safely; the waste was a free source of nutrients like nitrogen and phosphorus, afterall. read more