Toma de decisión en ambiente difuso. Aplicación a la elección de un sistema de desinfección de agua depurada

The reuse of treated wastewater from wastewater treatment plants (WWTP) is an international practice with a large variety of applications, i.e. irrigation, urban and recreational uses, groundwater recharge, aquaculture, and industrial uses, among others. For all of these, the quality of the water should be taken into account. But it is also important to remark that the environmental and social impact derived from treated wastewater reuse is an intrinsically complex multidimensional process. So the final decision involves multiple criteria and multiple actors. Many times uncertain information was available in social and environmental factors everyone, so it is necessary the applications of fuzzy tools to asses it. This work presents the use of multicriteria decision through the fuzzy TOPSIS method, applied to six different methodologies concerning the disinfection of treated wastewater before reusing. For this purpose, a set of criteria and subcriteria through a series of pair-wise comparisons have been used with linguistic and non-linguistic information that was processed by the experts.