Converting ALL of a food or biomass into energy?

(wasn’t sure what subreddit to post this to, lol—if anyone knows a better place for this question please don’t hesitate to say so)

I’ve heard of using mechanical parts to take the nutrients and certain parts in a food and convert it to electricity, but is it/will it ever be possible to convert the rest of the food into more energy or something else so that very little to no waste is created?

(Also sorry if this is worded weirdly, I wasn’t sure quite how to express this question)

submitted by /u/teenytoons2
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