Multi-criteria analysis for the selection of advanced oxidation technologies in the treatment of emerging pollutants

Abstract

Although there is technical information on the efficiency of advanced oxidation technologies (TAOs) at the laboratory level, in some cases at the pilot level and few on a large scale, it is not easy to select the most appropriate technology for an effluent, since the selection of technology depends on the characteristics of the contaminated water. Through the application of the multicriteria analysis technique, this article proposes a scale of TAOs for the complementary treatment of water contaminated with contaminants emergent (CE). The chosen alternatives were the technologies with peroxide (H2O2), Ozone (O3) and Fenton (Fe/H2O2) processes, the evaluation criteria were electric energy consumption (EEO), technological maturity level, complexity of design / operation and cost of operation. The technology most recommended by AHP is ozone and peroxide / UV with a difference of 8.6% in the frequency in the evaluation of the criteria. For the AHP-TOPSIS methodology, peroxide / UV is the key technology over ozone with a difference of 31.4% in the frequency of selection.