microbes will clean wastewater and generate electricty

A team of researchers from China and the US have modified a microbial fuel cell, which carries naturally occurring bacteria to convert wastewater into clean water, while generating electricity.

Much more efficient than a conventional microbial fuel cell, it uses 200 milliliters of artificial wastewater to desalinate about 3 milliliters of salty water and the team is confident that they’ve hit upon a system which can have enormous potential if more research is done. source