污水处理和回用技术的应用：中水回用在沈阳的发展前景和存在的问题

为了解决水资源供应严重短缺，缓解污水排放对环境造成的破坏，沈阳市在今后5～10年内将建成中水回用系统，使城市中水回用率达到50％.文中回顾了污水处理和回用技术的发展现状，总结了中水回用的常规技术和新工艺(包括土壤渗滤法、膜生物反应器工艺法、周期循环延时曝气工艺法)，并指出土壤渗滤法(SAT)和膜生物反应器(MBR)因其独特的技术优势，在中水回用领域的光明前景.通过列举一些污水回用项目的实际例子，分析了中水回用技术应用所带来的经济和生态效应，并探讨了沈阳市中水回用存在的问题和解决方法.

Application of wastewater treatment and reuse techniques: Related problems and perspectives in Shenyang

To resolve the severe scarcity of water resources and to alleviate the pollution of wastewater disposal, the comprehensive urban wastewater reclamation and reuse projects will be launched in Shenyang in the next 5 - 10 years, and the wastewater reclamation and reuse rate will reach 50%. This paper summarized the routine technologies and new treatment processes of wastewater treatment, such as soil-aquifer treatment (SAT) , membrane biological reactor (MBR), and cyclic active sludge system (CASS), and pointed out that owing their unique advantages, SAT and MBR were regarded as the promising techniques in this field. A short list of examples in wastewater treatment and reuse was presented, and the societal, environmental, and economical benefits of wastewater reuse were analyzed. The existing problems of wastewater reuse were also discussed.