Arborloo

thumb|upright=1.35|Steps of usage of the arborloo. thumb|Arborloo in Ekwendeni, [[Malawi]] An arborloo is a simple type of composting toilet in which feces are collected in a shallow pit and a fruit tree is later planted in the fertile soil of the full pit. Arborloos have: a pit like a pit latrine but less deep; a concrete, ferrocement or other strong floor; a superstructure (toilet house or outhouse) to provide privacy; and possibly a ring beam to protect the pit from collapsing. The pit should remain well above the water table in the soil, so as to not contaminate groundwater.