The Yemeni long-drop dry-composting toilet
As the presence of soil-pipes demonstrates, this method of waste-disposal is no longer used. Formerly the necessary offices on the upper floors were of the simple hole over a void pattern, the waste dropping within the open-sided shaft into a collection tank. Any liquids drain off and the remaining solids dry out in the heat. Periodically it is collected and burnt: a traditional source of heat for the hammams. The ashes are used as fertiliser.Worked perfectly well for hundreds of years......






