RESUMEN Se diseno y construyo un colector solar de tipo cilindro parabolico (CCP) a pequena escala de concentracion media de energia, con el proposito de disminuir la concentracion de coliformes totales y fecales presentes en el agua proveniente de fuentes naturales de abastecimiento mediante la aplicacion de procesos termicos y termico-fotocataliticos (Ti0 2 Degussa P25) que hacen uso de la radiacion solar. Los resultados de esta investigacion permiten concluir que aunque la luz solar por si sola tiene un efecto bactericida, el TIO2 en presencia de radiacion solar inactiva los coliformes mas rapidamente empleando menores temperaturas comparada con el proceso termico, lo que hace de este un metodo efectivo para el tratamiento del agua para consumo humano. Palabras claves: Agua, Desinfeccion, Fotocatalisis, Colector cilindro-parabolico, Energia solar ABSTRACT A kind of parabolic cylinder solar collector (CCP) was designed and constructed on a small scale of average concentration of energy, with the intention of decreasing the concentration of coliformes total and fecal present in the water gotten of natural sources of supply by means of the application of thermal processes and thermal photocatalytic (Ti02 Degussa P25) that use the solar radiation. The results of this investigation allow to conclude that though the solar iight for itself has a bactericidal effect, the TI02 in presence of solar inactive radiation the coliformes more rapidly using less temperatures compared with the thermal process, which does of this one an effective method for the treatment of the water for human consumption. Keywords: Water, Desinfection, Photocatalysis, Cylinder-Parabolic Collector, Solar Energy