污水的深度处理与回用
摘要：当前水资源短缺问题在我国许多城市日趋严重，给人民群众的日常生活和社会的可持续发展带来了巨大威胁，而对城市污水进行深度处理并回用是缓解水资源紧张的有效途径。污水深度处理与回用的目的是回收淡水资源以及污水中其他可利用的能源与物质，将污水作为第二水源来提高循环用水率以缓解水资源紧张问题。文章分析了污水处理与回用的意义，并对深度处理与回用的工艺类型与发展趋势进行了研究。
关键词：城市污水；深度处理与回用技术；水资源短缺
Advanced treatment and reuse of sewage
Abstract：At present, the shortage of water resources is becoming more and more serious in many cities in China, which poses a great threat to people#39;s daily life and social sustainable development. The advanced treatment and reuse of urban sewage is an effective way to alleviate the shortage of water resources. The purpose of advanced treatment and reuse of sewage is to recover fresh water resources and other available energy and materials in sewage, and use sewage as the second water source to improve the rate of circulating water, so as to alleviate the shortage of water resources. This paper analyzes the significance of wastewater treatment and reuse, and studies the process types and development trend of advanced treatment and reuse.
Keywords: urban sewage; Advanced treatment and reuse technology；Water shortage
随着现代化建设的加快，用水量逐渐增长与淡水资源总量有限之间的矛盾日益突出。我国有许多城市水资源短缺问题越来越严重，已经影响到人民群众的生活和社会的可持续发展。我国对当前水资源严峻形势给予高度重视，采取多种的方式来缓解用水危机。城市污水总量大，水质稳定，就近可得，易于收集，而且
投资与处理成本较为低廉，是可靠优质的第二水源[1]。
1.污水深度处理与回用的意义
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