Research on AHP-TOPSIS technology applicability evaluation method based on water pollution treatment target demand

A set of technology applicability evaluation method was constructed according to the differentiated needs of water pollution treatment goals. In the index system constructed for technology screening and evaluation, the water pollution treatment goals should be decomposed into evaluation indexes, and the performance indexes of the technology itself should be included. Then, Analytic Hierarchy Process (AHP) was used to assign weight to each index in the index system, and the comprehensive performance of the alternative technologies was evaluated by using Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) method, so as to screen out the adaptive recommended technologies that met the needs of water pollution treatment objectives. This method was applied to the case studies of a sponge city construction and a black and smelly water treatment project, to investigate whether the technical applicability evaluation method constructed in this study could achieve the expected effect. Due to the different governance objectives and needs, the technical evaluation index system and the weight of evaluation index were different in these two case and, as a result, the suitability recommended technologies screened from the same technology library were not consistent. This indicated that the AHP-TOPSIS technology applicability evaluation method could be used to screen the adaptive recommended technologies according to the differences of water pollution governance objectives and needs.