Research On Theory And Model For Comprehensive Benefit Evaluation Of Urban Sewage Treatment Project

Urban sewage treatment project is the important component of the urban infrastructure construction, and it has a significant impact on urban development. In order to ensure the reasonableness of the choice program and the accuracy of the overall decision-making, made evaluation on the comprehensive benefit of the urban sewage treatment project is necessary. Making comprehensive benefit evaluation on urban sewage treatment project is a complex and systematic project which is involved the economic, social and environmental aspects. Previous evaluations of the sewage treatment project were preceded more from the economic benefits; there are one-sidedness that the other influence factors were neglected.This study selected 23 comprehensive evaluation indexes from 3 aspects of the economic, social, environmental, and the quantization formula and standardized method of the most indexes. The weights of the various indexes are confirmed by AHP, and the comprehensive benefit evaluation model of urban sewage treatment project is established by using Gray evaluation method, it is more reasonable and comprehensive than the single economic evaluation model.Firstly, on the base of introduced domestic and foreign development of urban sewage treatment, and summarized the domestic sewage treatment research, the study analyzed the achievements and deficiencies of the current evaluation system, and it point out the evaluation method in the study.Secondly, on the base of analyzed the definition, features of the urban infrastructure, and the evaluation method of the comprehensive benefit, the study discussed and analyzed the attribute of urban sewage treatment project, and the feature, the principle of the comprehensive benefit evaluation.Thirdly, in the premise of concept and principle of the index, the evaluation system of urban sewage treatment project comprehensive benefit was established the economic, social, environmental, 3 different aspects. On the guidelines of the evaluation system, the evaluation index system was established. At the same time, it analyzed the index system.Fourthly, on the foundation of the index system and the fact circumstances of urban sewage treatment project, the study used AHP to calculate the weight coefficient. Through the questionnaire, it educes the corresponding scaling list of the index. After analyzed, on the base of the principles of Gray evaluation, it established the Gray Multi-level Comprehensive Evaluation Model.Fifthly, it introduced the construct background, survey, and the process of the He Dong's sewage treatment project of Xiangtan, and the relevant data was put into the comprehensive evaluation model and got the result. The research result can be a reference for the urban sewage treatment project in the future.Finally, it summarizes the research results in conclusions part, and it also pointed out the content which is need for further research.Comparing with the present programs selection which is briefly according to the economic data used in urban sewage treatment project feasibility analysis, the Gray Multi-level Comprehensive Evaluation Model can reflect the influence of each system factor to the whole body more objectively, and makes the evaluating results more scientifically and reasonably, provides preferable scientific accordance for the urban sewage treatment project construction.