全文总字数：5790字
文献综述
文 献 综 述摘要：随着人类生存环境的不断恶化和自然资源的日益减少，人类社会的可持续发展面临着严峻的挑战，这迫使人类必须重视自然环境的保护与自然资源的合理开发这样一个生死攸关的大问题。
而在这个大问题中，水又是最重要的；因为水是生命的源泉，水在自然资源中应用最普遍，分布最广泛，对人类最重要。
目前城市生活污水排放已是中国城市水体的主要污染源，城市生活污水处理是当前和今后城市节水和城市水环境保护工作的重中之重，污水处理按处理程度划分为一级、二级、和三级处理，这里综述了常见的城镇污水处理工艺如A2/O工艺、改良A2/O工艺、SBR工艺、吸附再生法、氧化沟工艺等。
关键词：A2/O工艺、改良A2/O工艺、SBR工艺、吸附再生法、氧化沟工艺。
Abstract：With the continuous deterioration of the human living environment and the declining natural resources, the sustainable development of human society is facing severe challenges, which forces mankind to pay attention to the protection of the natural environment and the rational development of natural resources, a major issue that is vital to life and death. In this big problem, water is the most important; because water is the source of life, water is the most widely used in natural resources, the most widely distributed, and the most important to mankind. At present, the discharge of urban domestic sewage is the main source of pollution in China's urban water bodies. Urban domestic sewage treatment is the top priority of urban water saving and urban water environmental protection at present and in the future. Sewage treatment is divided into first, second, and second level according to the degree of treatment. And tertiary treatment, here is an overview of common urban sewage treatment processes such as A2/O process, modified A2/O process, SBR process, adsorption regeneration method, oxidation ditch process, etc. Keyword：A2/O process, improved A2/O process, SBR process, adsorption regeneration method, oxidation ditch process.一.污水处理工艺1.引言随着经济的快速发展，水资源短缺的压力越来越大，人们最终意识到是社会中水的消耗量超出了自然循环可承载的范围。
人们越来越意识到合理利用水资源的重要性，只有充分尊重水资源自然循环的规律，实现水资源的多次循环利用，维持水资源的循环平衡，才是水资源可持续利用的有效途径。
而污水处理系统的广泛应用是社会可持续发展的必然选择。
为使污水达到排水某一水体或再次使用的水质要求对其进行净化的过程。
污水处理被广泛应用于建筑、农业、交通、能源、石化、环保、城市景观、医疗、餐饮等各个领域，也越来越多地走进寻常百姓的日常生活。
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