This toilet consists of two pits, each covered with a slab with a drop hole and a vent pipe covered with a fly screen, and one superstructure. (see figure 2). The drop hole must remain open, because closing it blocks airflow. The door should be closed so the superstructure remains dark inside. Only one pit is used at a time. When the first pit's contents rise to 0.5 meter below the slab, its drop hole is covered and the second pit is used. After a period of at least one year, the contents of the first pit can be removed safely and used as soil conditioner.
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