Arborloo

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Steps of usage of the arborloo.

An Arborloo is a simple and ecological type of toilet consisting of:

  • Pit
  • Concrete slab
  • Superstructure (toilet house) to provide privacy
  • A ring beam to protect the pit (optional)

The concept of the arborloo toilet is to collect feces in a pit, and subsequently to grow e.g. a fruiting tree in this very fertile soil.

The arborloo works by temporarily putting the slab and superstructure above a shallow pit while this pit fills. When the pit is nearly full (3/4), the superstructure and slab is moved to a newly dug pit and the old pit is covered with the earth got by digging the new pit and left to compost. The old site uses a bed for fruit tree or other, which is preferably planted during the rainy season.[1]

The arborloo can be considered a simple form of composting toilet. In using the nutrient rich soil of a retired pit the arborloo in effect treats feces as a resource rather than a waste product. In this the arborloo both addresses issues with sanitation and provide increase crop output.

The pit[edit]

The defecation pit may be circular or square and this may depend on the slap and superstructe. A circular pit is less likely to collapse.[2] The pit of the arborloo is shallow (between 1-1.5 meter).[3]

If the pit is dug by hand it must have a diameter/width of at least 0.9 meters to accommodate effective digging.[4] The pit should not be wider than the slab and must allow for 0.1 meter bearing around the edge.[5]

References[edit]

  1. ^ Morgan, Peter (2007). Toilets that make compost: Low-cost, sanitary toilets that produce valuable compost for crops in an African context. Stockholm: EcoSanRes Programme. ISBN 978-9-197-60222-8. 
  2. ^ WEDC (2012). An engineer's guide to latrine slabs. Loughborough University: WEDC. p. 4. ISBN 978 1 84380 143 6. 
  3. ^ Morgan, Peter (2007). Toilets that make compost: Low-cost, sanitary toilets that produce valuable compost for crops in an African context. Stockholm: EcoSanRes Programme. ISBN 978-9-197-60222-8. 
  4. ^ CAWST (2011). Introduction to Low Cost Sanitation Latrine Construction. CAWST: Center for Affordable Water and Sanitation Technology. p. 16. 
  5. ^ CAWST (2011). Introduction to Low Cost Sanitation Latrine Construction. CAWST: Center for Affordable Water and Sanitation Technology. p. 16.