Picture of Arbor Loo Composting Toilet for Haiti
Moveable composting toilets that allow fruit or wood-bearing tree saplings to be planted have been used for many years in Africa and now Haiti (see: S.O.I.L.) to encourage planting of orchards by families. This design was for a villiage in Haiti's Central Plateau and is based on those ideas. Four units were constructed using materials available in nearby Hinche at a cost of about $135 U.S. which includes the estimate for labor for 1 day (2 men), construction, transport and installation. An example can be seen at the Kobonal school Notre Dame Ste. Trinite.

The enclosure is constructed of panels of corrugated tin over PVC pipe frames. The tin is attached with loops of baling wire and the panels are joined with baling wire. The roof of the enclosure is sloped toward a drip-edge in the rear where rainwater is directed to a covered bucket with faucet for hand washing. The entrance is a curtain made from a piece of tarp. This results in a light-yet-strong enclosure easily lifted by one person. The enclosure is anchored to a portable concrete slab with 4 bolts and brackets.

The reinforced concrete slab has carrying handles and is thin enough to be carried by 4 men. It supports a pedestal with toilet seat, the enclosure, and a vent pipe.

A 3' x 4' x 3' deep hole is dug and the edge leveled. The slab is placed over the hole and the enclosure and vent pipe attached. The bucket is attached and filled with water. Corn cobs are provided for wiping and a soil+ash+leaf mix provided to aid composting. Flies and odors are reduced by a screened vent pipe and by keeping the lid on the toilet seat closed between uses.