In Paragangia, they have technology which can turn any form of matter or energy into any form of matter or energy. this process is called recycling, especially in the context of disposing or anything whatsoever which is no longer needed, like for example, dead people.
Energy and matter which is collected is stored in the form of whatever matter or energy is most efficient to store, I have no Idea what that may turn out to be I guess it will depend n the situation, and then it is used to power the Reverse Drive engines and all the energy and matter needs of the community, matter of any sort desired being produced by Material Generators.