Washing dishes with superheated steam more effective, earth-friendly

Superheated steam dishwashers could provide a more effective, environmentally friendly solution than conventional dishwashers. Researchers simulated such a dishwasher, finding that it killed 99% of bacteria on a plate in just 25 seconds. The model of an idealized dishwasher looks like a box with solid sides, a top opening, and a nozzle at the bottom. A plate covered with heat-resistant bacteria is placed directly above the nozzle. Once the plate reaches a certain threshold temperature, the microorganisms are deemed inactivated.

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