基于能值理论的生态污水处理系统资产价值评估模型构建及应用

发布时间：2018-10-09 20:37

【摘要】：生态污水处理系统作为新兴的城市水资源污染解决方式,成为政府和社会资本在公共服务领域合作的重点,在移交阶段对公私合营的公共服务项目进行资产价值评估具有防止公共资产流失、实现社会和经济效益最大化的作用。根据公私合营项目合作模式,生态污水处理系统移交阶段的评估重点在于对其使用性能的判定和预测,只有在明晰使用性能的前提下才能准确定位其资产价值。生态污水处理系统属于生态资产,现有的评估方法存在两方面问题,一是评估方法缺乏对系统成分内部之间复杂关系以及运行机理的科学解释,二是评估方法多局限于针对某一时间节点的静态评估,评估目的突出在对生态服务功能的物质、价值量的分析,而不是针对生态过程的动态分析。这两方面问题制约了生态价值评估研究的精细化深入发展。本研究采用能值分析理论和时间序列分析方法,充分发挥能值理论在分析复杂系统方面的优越性,全面考察驱动系统的能物流及系统间的交错、放大及协同作用,对生态污水处理系统展开分析,从运行效率、资源结构、功能稳定和环境安全4个维度建立考核系统使用性能的能值指标体系,评估系统资产静态价值;同时,创新性提出固定能值输入和流动能值输入概念,提出修正能值指标和数据处理方法,优化时间序列分析结果,实现资产动态价值评估。最后,以襄汾县人工湿地污水处理系统为案例,统计整理该系统自2009年7月试运行至2013年12月的运行数据,采用本研究提出的评价模型和数据处理方法进行使用性能评估,对评价结果做出解释,并根据案例分析过程及结果,对提出的模型做出评述。
[Abstract]:As a new way to solve urban water pollution, ecological sewage treatment system has become the focus of cooperation between government and social capital in the field of public service. The evaluation of the value of public service projects in the transfer stage can prevent the loss of public assets and realize the maximization of social and economic benefits. According to the model of public-private joint venture project, the evaluation of ecological sewage treatment system is focused on the judgment and prediction of its use performance. Only under the premise of clear use performance, can the value of its assets be accurately located. Ecological sewage treatment system belongs to ecological assets. There are two problems in the existing evaluation methods. One is the lack of scientific explanation of the complex relationship between the components of the system and the operation mechanism. The other is that the evaluation method is limited to the static evaluation of a certain time node, and the purpose of the evaluation is to analyze the material and value of the ecological service function, but not the dynamic analysis of the ecological process. These two problems restrict the development of ecological value evaluation. In this study, the emergy analysis theory and time series analysis method are used to give full play to the superiority of emergy theory in analyzing complex systems. Based on the analysis of the ecological sewage treatment system, an emergy index system for evaluating the performance of the system is established from the aspects of operation efficiency, resource structure, functional stability and environmental security, and the static value of the system assets is evaluated. The concepts of fixed emergy input and current emergy input are proposed innovatively. The modified emergy index and data processing method are proposed to optimize the results of time series analysis and to realize the dynamic valuation of assets. Finally, taking Xiangfen County constructed wetland sewage treatment system as an example, the operation data from July 2009 to December 2013 are statistically collated, and the evaluation model and data processing method proposed in this study are used to evaluate the performance of the system. The evaluation results are explained, and the proposed model is reviewed according to the case analysis process and results.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：X703;X196

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