Restaurant waste, which is what your post body starts with, can’t be recycled like that. It’s an unsafe practice due to the contamination gained at the table combined with time out of the temperature safe zone. Even if you killed an the pathogens there, the risk of the toxins left by those pathogens is problematic. That and it would ruin the food trying to kill them to a reasonable degree.

Now, back in the kitchen, you could do what some restaurants do and donate the prepared but unserved food to local distribution centers (often focused on homeless charities or government outlets). But it wouldn’t make sense to turn it into some kind of “nutrition loaf”. Seriously, look up that term and be prepared to hate the prison system more than you do currently.

And that is why even if the process could be perfectly safe, it would still suck. Nobody should have to eat the horrible crap that it would turn into. If would be cheaper, safer, and more humane to just make sure everyone has good food to eat in the first place.

The only application for the kind of bricks you’d get from the process is feeding people that don’t have access to good, healthy food in the first place.