Book Cover: Solar Water Disinfection

The idea of Solar Water Disinfection was presented for the first time by Aftim Acra in a booklet published by UNICEF in 1984. A research team at EAWAG/ SANDEC embarked on comprehensive laboratory experiments in 1991 to assess the potential of this method for the inactivation of bacteria and viruses. Laboratory research revealed synergies in the inactivation of microoganisms through the combined use of UV-A radiation and increased water temperature. Field tests confirmed this effect which significantly enhances the potential of Solar Water Disinfection, SODIS. This simple water treatment process subsequently was field-tested in demonstration projects to assess its socio-cultural acceptance and affordability by the target population. The response and interest for SODIS were very positive.


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