Sewage is produced in every city, but for the first time ever, one city in Denmark is on the cusp of harnessing energy to power its water treatment system from its waste.
With a $3.2 million renovation that gives the Marselisborg Wastewater Treatment Plan in Aarhus, Denmark the ability to create heat and electricity from biogas, a mixture of different gases, it’s expected they’ll generate more than 192 percent of the energy needed to run the plant. Extra electricity will then be used to supply fresh water to the city, which has a population of 200,000, or be funneled back to the utility grid.
Aarhus may be the first city to put the idea into motion, but this isn’t the first time we’ve heard about waste providing energy. In 2015, a study from the United Nations University’s Institute for Water, Environment, and Health found that biogas produced by all the human poop in the world could power up to 138 million homes!
And thanks to Aarhus, other cities like Chicago, San Francisco, and Copenhagen are showing an interest in jumping on board too.