Steam dishwashers could reduce water and energy use
Conventional dishwashers often do not eliminate all the harmful microorganisms left on plates, bowls, or cutlery. Moreover, they require long cycles which use a lot of electricity, while the soap that is pumped in and out is released into water sources, leading to environmental pollution.
According to a new study led by the Technical University of Dortmund and the Technical University of Munich (TUM), superheated steam dishwashers – which kill 99 percent of bacteria on dishes in just about 25 seconds – could be a more effective and environmentally-friendly solution.
The scientists created a simulation of an idealized dishwasher, resembling a box with solid side walls, a top opening, and a nozzle at the bottom. Plates covered with heat-resistant strains of bacteria should be placed directly above the nozzle. Once a certain threshold temperature is reached in the simulation, the microorganisms are deemed inactivated.