【作者】 李冬梅；

【导师】 党志良；

【作者基本信息】 西安理工大学 ， 环境工程， 2007， 硕士

【摘要】 水资源短缺和水体污染已成为严重制约西安地区可持续发展的主要因素。污水回用是解决该问题的有效途径,它不仅可以提高水资源利用率,降低用水成本,减少污水排放量,改善水污染状况,而且对于促进水资源的良性循环和区域社会、经济、环境的可持续发展具有重要意义。本文结合西安纺织城区实际情况,从污水回用的市场需求出发,研究该区污水回用系统设计和系统优化问题。通过调查分析目前国内外污水回用技术的研究与发展状况,结合纺织城区回用水市场需求分析和用水结构分析,确定了该区污水回用的方向;在确定西安纺织城区污水回用系统的组成基础上,运用静态评价指标,利用SPSS分析统计软件对城市污水回用系统不同工程规模单位投资费用和单位制水成本方面进行了分析,得出了纺织城区污水回用系统的经济处理规模;结合国内外污水回用标准和纺织城区具体实际情况提出了适合纺织城区的污水回用水质标准。设计提出了三个污水再生处理工艺方案,并对其进行了比较选优,确定了最适合该区的回用水水处理工艺;通过借鉴给水管网优化设计的思路,以年费用折算值为目标函数,应用改进遗传算法建立了回用水配水管网优化设计的遗传算法模型,并应用经典算例对改进遗传算法优化模型进行了验证,通过对比分析说明本文的改进遗传算法计算效率更高、收敛性更好、优化结果更加理想。本文应用MATLAB遗传算法工具箱完成了算法的求解,与传统的完全手工编程相比具有效率高、快捷方便等优点,为污水回用系统管网优化提供了新的方法和思路。更多还原

【Abstract】 The situation of lacking water and water pollution has become a key factor of sustainable development in XI’An area. Water reuse is an efficient measure to solve the problem, which can not only elevate the availability of water resource, cut down the cost of water-using, reduce sewage quantity, improve the condition of water pollution, but also have important meaning to promote the positive cycle of water resources and the regional sustainable development problem of social economic environment. Binding to the practice of Xi’An Textile area, system design and optimization of water reuse is researched from market demand in this area.Through analyzing the research status and dynamic development of reusewater at home and abroad, and combining market demand analysis as well as water-using structure analysis in Xi’An Textile area define the direction of reusewater in this area. Static evaluating indicator and SPSS is used to analyze unit investment cost and unit water-produce cost of different scale of reusewater projects in order to define the economical treatment scale of the reusewater system in Textile area under the circumus of the composition of the system is analyzed.Reasonable water quality criteria in Textile area is confirmed throuth combining criterion of wastewater reuse in home and abroad with practical situation of the zone,and the most appropriate process flow is defined by comparing the three designed programme.The idea of optimal design of distribution network of the system is learned from water optimal design of supply networks, and the year expenditure converting service as the object function of the optimum design and improved Genetic Algorithm.is applied to establish the model of optimal design and solve the model. A classical example is applied to certificate the improved GA in this paper is much better than others.GATOOLS of MATLAB is applied to solve the optimal design, and compared with traditional programmed by handwriting, its efficiency much higher and much more convenient, and it offers a new method and idea for reusewater system.更多还原