Composting toilet (dry): Also called a dry toilet: no water use at all (a scoop of sawdust or similar carbon material after each use instead of a flush), so it produces no blackwater st
Low-flush toilet to septic: Conventional fixture, minimises water use per flush while still relying on a wet treatment system.
Urine-diverting dry toilet (UDDT): A dry toilet variant: still no water use and no blackwater stream, with urine separated from solids at the source to reduce odor and moisture and let each strea