The Navy has financed research into compactors, shredders and plastics processors as well as more exotic concepts such as molten salt and plasma arc incinerators that would treat a ship's waste while it is at sea. (newscientist.com)
Using heating and pressurization systems that separate sewage into water and carbon, it would also fuel its own machinery and lights using plasma arc gasification. (discovermagazine.com)
This is due to the ceramic plasma arc spray (the same technology found to treat the original Space Shuttle engines) used to protect the front wheels from brake heat. (hotrod.com)