The ozone method especially interests me, as it seems to, if done properly, be a method with no consumption besides power.
Here's my idea:
What about a plastic box, storage container, doesn't have to be air tight, but it wouldn't be a bad idea. One hole, cut for power leads and sealed with hot snot. This plugs into an ozone generator inside the box (a cheaper unit without a tube could be used) and then something like a load of UV LED strips mounted around the box. The idea here is that the oxygen inside the box gets converted into Ozone (could be on a timer, just to keep ozone levels up) and then the UV light applies whatever principle is behind this operation. It could be stuck in a basement, or somewhere else away from regular human interaction for safety. The idea is you can just lob large items into it, and do it without consumables.