Roasting Coffee by the Rays of the Sun


In Italy your next cup of coffee may come from a solar roaster instead of an unsustainable source. Climate change is threatening the ability of coffee plants to survive, as a result the entire industry may not exist by the end of the century. This has got smaller players in the industry (not the mega corporations) to explore new ways to process coffee from plant to cup.

A roasters the size of a tennis court can roast coffee using only the rays of the sun, making it incredibly efficient. The only high tech aspect of the whole operation are a few microchips and servos to move the mirrors

The process isn’t only environmentally friendly and economically convenient. According to Durbe and Tummei, it also better preserves the coffee’s aroma, giving it a richer flavor. Unlike conventional hot air ovens, which are typically gas-powered, the concentrated sunlight roasts the coffee without heating the air around it — by penetrating the grains in a more uniform way and without burning the exterior.

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