Active compost pile: Aerobic composting of organic waste; outputs feed greywater/blackwater nutrient reuse and thermal-comfort heat capture.
Bokashi fermentation composting: Anaerobic fermentation in a sealed bin; handles cooked food/meat scraps that open composting struggles with.
Biochar production (pyrolysis of woody waste): Charring woody waste in a low-oxygen process yields a stable, long-lived carbon material; production is in scope now even though its main use (soil amendment) w
Electric kitchen food waste composter/digester: Sealed countertop or under-sink appliance that grinds and either dehydrates or aerobically digests food waste, including cooked food, meat, and dairy that an op
Household anaerobic biodigester (biogas + digestate): Sealed, oxygen-free (anaerobic) digestion of food scraps, and optionally manure or dry-toilet residue, by methane-producing bacteria, yielding two outputs at on
Vermicomposting (worm bin): Earthworms (typically Eisenia fetida, 'red wigglers') digest organic waste in a ventilated bin at ambient temperature, producing both finished compost and a sep