The system uses plasma to briefly turn oxygen inside sealed packaging into ozone in order to sterilise food.

BBC: Plasma device developed to 'sterilise' food

In effect, the various plates act as an atomic distillation system which sorts the plasma into its constituent elements.

ECONOMIST: Nuclear waste

And, similar to Dyson, Lugg is proposing to achieve these radical efficiencies by coordinating multiple engine systems (analogous to the acceleration, inducement and entrainment of the Air Multiplier) to create optimal conditions for each stage of flight and to use the excess energy the system produces to create a plasma field to reduce drag and eliminate sonic boom.

FORBES: For Radical Innovation, Nature Loves A Vacuum

The drawback of using plasma technology to clean exhausts has always been the extra power required to run the system.

ECONOMIST: Diesel engines