Brainerd, Minn., looking at sewers as energy source
Brainerd officials are looking at an unconventional place for a future energy source: the sewers. Brainerd-based Hidden Fuels began working with the city and the school district in 2009 and later installed sensors in the sewers. For more than a year they measured the temperature and the amount of sewage running through them.Word count: 132
The full article is available to newspaper subscribers. If you are a subscriber please log in to continue reading.