论文部分内容阅读
提高水资源使用效率和污水处理效率是解决目前水资源短缺的重要途径。中国工业用水系统可分为生产用水子系统和污水处理子系统。本文考虑两个子系统之间的联系,并区分污染物在两个子系统中的弱处理和强处理特性,提出了一种基于DEA的两阶段评价模型。应用本文提出的新模型分析中国30个省级区域的工业用水系统的效率,结果表明:中国省级区域工业用水整体效率不高,且地域分布特征明显,东部、西部、中部效率依次递减;中国工业用水系统的非有效性主要源于污水处理效率的影响;工业用水系统效率与地区水资源禀赋存在一定的关系,水资源短缺的地区用水效率相对较高。文章所提出的方法兼顾生产用水子系统和污水处理子系统之间的相互影响,能够同时评价两个子系统效率和工业用水系统的整体效率,能有效发现系统中影响整体效率的关键环节,且可以应用于其他能源效率评价问题,具有明显的实际应用价值。
Improving water use efficiency and wastewater treatment efficiency is an important way to solve the current shortage of water resources. China’s industrial water systems can be divided into production water subsystem and sewage treatment subsystem. In this paper, the relationship between the two subsystems is considered, and the weak and strong processing characteristics of pollutants in the two subsystems are distinguished. A two-stage evaluation model based on DEA is proposed. The new model proposed in this paper is used to analyze the efficiency of industrial water systems in 30 provinces in China. The results show that the overall efficiency of industrial water in China’s provincial regions is not high, and the geographical distribution is obvious with decreasing efficiency in the eastern, western and central regions. China The ineffectiveness of industrial water systems is mainly due to the efficiency of wastewater treatment. The efficiency of industrial water systems is related to the regional water resource endowments, and the water use efficiency is relatively high in water-scarce areas. The proposed method balances the interaction between the production water subsystem and the wastewater treatment subsystem, and can simultaneously evaluate the efficiency of both subsystems and the overall efficiency of the industrial water system, and can effectively find the key links affecting the overall efficiency of the system and can Applied to other energy efficiency evaluation problems, has obvious practical value.