I previously wrote about efforts by the Bill &
Melinda Gates Foundation to promote the development of toilets suitable for
developing nations. A team from
Switzerland and Austria received a $40,000 prize for their “Diversion” toilet.
The winning design is a squatting toilet that separates
liquid and solid wastes. It treats
water to provide small amounts for hand and anal washing as practices in many
Islamic and Hindu cultures. Urine and
feces are collected in separate, self-sealing barrels that are hauled to a
central location for treatment.
The toilet includes a business model as well as a
technical design. The toilets are rented
to local entrepreneurs who will in turn lease them to customers and perform
maintenance and waste hauling.
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