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Abstract
Sewage treatment and reuse have always been hot issues in both the business and academic communities in all nations around the world. In order to solve the difficulties in accurate quantization and objective evaluation of industrial sewage treatment projects, this paper proposed a comprehensive industrial sewage treatment project evaluation method based on the improved entropy–TOPSIS method. First, this paper constructed an evaluation indicator system for sewage treatment projects from the four aspects of environmental performance, economic performance, managerial performance and social performance. Second, it made a modification to the experts’ experience-based grading using the entropy weight method and determined the weight of the indicators in a more objective and more accurate manner. Third, this work improved the traditional TOPSIS method and simplified the calculations with regard to the traditional TOPSIS-based comprehensive evaluation. Finally, by taking the example of evaluating industrial sewage treatment projects of the China Water Affairs Group in Q city (ChongQing), China, this paper verified the feasibility and practicability of the proposed comprehensive industrial sewage treatment project evaluation system and method.
Highlights
In the past one hundred years, resource utilization and environmental protection have been a deep concern of all nations in the world
The establishment of an evaluation indicator system for industrial sewage treatment projects is critical to the comprehensive evaluation of sewage treatment projects
This set of indicators is established to reflect the effects of industrial sewage treatment projects on multiple aspects, i.e., the economy, the environment, technology, management and society, from different angles, levels and ranges based on the basic principles and rules of comprehensive evaluation of sewage treatment projects
Summary
In the past one hundred years, resource utilization and environmental protection have been a deep concern of all nations in the world. The investment in sewage treatment in America, Japan and the UK, etc., accounted for 0.29%–0.55% and 0.53%–0.88% of the gross national product, respectively, in the 1970s and 1980s. The actual benefit of investment is lower than the expected benefit; some projects even face problems such as long-term failure to meet the design capacity, lower resource utilization rates, unreasonable structures of professional talents, excessive environmental pollution and poor capacity for repayment of loans. These problems are caused by inappropriate evaluation, selection and investment decisions of sewage treatment projects. In order to ensure fast and healthy development of industrial sewage treatment, reasonable evaluation, the selection of and investment in sewage treatment projects and to maximize the conservation of social resources and energy, this paper will carry out an in-depth study on the evaluation and selection of industrial sewage treatment projects using systematic engineering methods such as the entropy weight method and TOPSIS (Technique for Order Preference by Similarity to an Ideal Solution) method, providing evaluation method support and decision-making support to decision makers in selecting industrial sewage treatment projects that are more suitable to actual conditions in a more scientific and more reasonable way
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