Evaluation model of landfill leachate treatment system design scheme

This study extensively analyzed the characteristics of landfill leachate treatment systems for the comparison and evaluation of design schemes. The analysis was based on two design schemes related to the landfill leachate treatment system in Hangzhou. Additionally, a fuzzy comprehensive evaluation model for landfill leachate treatment system design schemes was established, considering the three target levels of safety, reliability, and economy. The evaluation factors for the target and attribute layers were proposed after a thorough analysis. The weight coefficients for the target, attribute, and scheme layers were determined using the fuzzy comprehensive evaluation model based on a questionnaire survey of experts. The evaluation results indicated that the design scheme involving an oxidation ditch outperformed the UNITANK design in the landfill leachate treatment system. Compared with the actual engineering cases, scheme A1 was better than scheme A2. For other similar qualitative and difficult to quantify the selection of the program, it could be evaluated with the help of fuzzy comprehensive evalution model. The inclusion of multiple factors in the target and attribute layers increased the complexity of the calculation process but enhanced the accuracy of the results. The method of transforming qualitative schemes into quantitative ones, as presented in this study, is not only practical, but also widely applicable.