Mona Chirie Mijthab

«From Feces To Fuel. Sanitation Service to Transform Human Feces into Solid Biofuel»

Wie muss eine nachhaltige Sanitärlösung für städtischen Slums in Kenya gestaltet sein, um das Recycling menschlicher Fäkalien in ein gefragtes Produkt zu ermöglichen und zu begünstigen?

How does a sustainable sanitation solution need to be designed to enable and promote the recycling of human feces into a desirable product in urban slums in Kenya?

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A global crisis: more than 2.5 billion people lack access to clean sanitation in developing countries. The consequences: inhumane conditions, health problems, and high mortality rates. Simultaneously, the growing demand for fuel leads to deforestation, high CO2 emissions, and respiratory diseases.

To address these issues, I developed a sanitation-cycle. Its starting point is the urine-diverting dry toilet MoSan that I designed in 2012. However, the toilet alone is not the solution. To avoid the spread of disease, human excreta needs to be contained for transport, treatment, and recycling. To ensure the safe transportation of feces, I developed an adequate container. After collection, feces are sterilized by sunlight and processed into fuel briquettes. The service, including the container and the biofuel, will lead to cleaner and healthier living conditions.

For two months, I worked with slum dwellers in Kenya. The success of the service has sparked interest in the development community.

(Case study with MoSan toilets and Sanivation Solar Treatment 
in the low-income settlement Karagita in Kenya.)

Prof. Michael Krohn, Herbert Pauser, Thomas Walde