One of the most urgent needs in the developing world is the access to an appropriate sanitation for a large part of the population. Still there is a lack of half a billion toilets. At the same time, existing sanitary technology wastes drinking water and overloads the sewage plants.
In India Dr. Bindeshwar Pathak has installed separation toilets for private as well as public use. These systems work perfectly without being connected to sewage plants. If they are installed in public places, they can be connected to biogas plants because there is enough methane gas produced to justify this additional investment.
These Sulabh toilet installations work even more profitable if managed within a franchising system and combined with facilities for bathing and washing clothes. These supplemental offers also motivate the users to maintain the place tidy themselves. Water ca be used several times within a cascading system and the environmental impact can be further controlled by distributing soap in a centralized manner. This is a business with several benefits, very much according to the principles of the Blue Economy.