Abstract: A space habitat includes a water processing assembly including a wastewater tank and a water processing section connected to the wastewater tank. The water processing section includes a pump to urge flow of the wastewater, a mostly liquid separator to separate gas from liquid in the wastewater, a catalytic reactor located downstream of the mostly liquid separator, and one or more sensors located downstream of the catalytic reactor to determine if the wastewater is sufficiently processed. A valve directs the wastewater to a water storage tank if the sensors determine that the wastewater is sufficiently processed, and direct the wastewater to the wastewater tank if the one or more sensors determine that the wastewater is not sufficiently processed. The space habitat further includes one or more of a carbon dioxide removal system, a trace contaminant removal system, a temperature and humidity control system or a waste collection system.