It’s the ciiiiiiircle, the circle of life, but instead of a cartoon lion there’s a grocery store running on electricity generated by the same food waste that store creates. More recycling, fewer anthropomorphic talking animals, but it’s a circle… of science.
The Sainsbury superstore in Staffordshire, England is reportedly the first time a retailer in that country has come off the National Grid to power a store, reports the BBC.
The store already sends all its food waste to an anaerobic digestion plant, which basically feeds the garbage to bacteria that break down the food in many steps, producing primarily carbon dioxide and methane gas, explains Popular Science.
The methane is separated from the carbon dioxide and turned into biomethane gas, which is then used to generate electricity. A 1.5-kilometer-long cable carries the electricity back to the store.