“What is a deuterium-antimatter reaction regulated by a dilithium matrix — or in the case of Romulans, a quantum singularity; or quantum slipstream which utilizes benamite crystals, though whether it is a fuel source is ambiguous and the subject of much speculation…?”
Technically, any matter/antimatter reaction will either end at 0:0, or 0:1 (depending on whether there’s anything left of one type or the other after the reaction is complete)
The intermix ratio is always 1:1. No waste that way.