Currently living in s 36 ft RV with a Nature's Head composting toilet. So far, 2 months of daily use without emptying it, other than the tank that catches urine.
The urine is just being dumped and most of the toilet paper goes out with the trash, until I can get the necessary equipment and supplies to build a special anaerobic digester. Then things really begin changing. Each accumulated jug of urine will be used to treat the accumulated toilet paper, prior to use in the digester ( called co-digestion), along with food wastes (raw vegetable trimmings, cooked leftover food, and so on) to make biogas, which will be 'scrubbed' to make it nearly pure Methane, which, in turn, will be used as cooking fuel. Digestate/effluent will be used in the garden to fertilize crops.
The waste from the composting toilet will enter a special secondary digester, a Sun-Mar 104 gallon capacity unit. The finished compost will be sanitary and ready to use in the garden as well.
I know people that are using digester effluent , either directly, or diluted, in aeroponic gardening. I've seen it used, along with aeration, to grow duckweed, which makes excellent fish food for Tilapia and Cichlids, such as the Rio Grand Perch (not a perch, just resembles one), which can be used in aquaponics, to raise both fish and some vegetables, while many plants can be grown in compost, without any soil whatsoever.
Closing the carbon and nutrient cycle eliminates waste and provides both food and gas for cooking, as well as gas for refrigeration (Servel type absorption refrigerators).