Fuel cells that run on wastewater

  Professor Bruce Logan of Penn State University has got a cool YouTube show and tell on a microbial fuel cell. Flush your toilet; recharge your batteries. Could be a new way at looking at wastewater.  

Microbial fuel cells become 50 times more efficient

Engineers say they've developed microbial fuel cells that can produce up to 50 times more electricity directly from wastewater as previous efforts.