1、 第 i 页 摘要摘要 小区生活污水的处理近年来越来越受到重视。小区污水的特点是可生化性好，适 合采用生物处理的方法如： 活性污泥法、 生物膜法等。 CAST 有很多的优点， 例如 CAST 工艺运行稳定，对有机物的去除效果好，抗冲击负荷能力强，产泥量小，不发生污泥 膨胀，反应推动力大，能在低温环境中长期运行，并保持高的处理效率。与其他二级 处理相比 CAST 工艺投资少、运行费用低、管理方便。 根据设计任务，本设计选用 CAST 做为小区生活污水的处理工艺，具有投资少， 运行费用低，自动化程度高，噪音小的特点，并且处理水质能达到国家规定的排放标 准。本设计说明书重点说明了 CAST 工艺在处
2、理小区生活污水时所采用的运行参数、 设计的计算方法和过程，以及一些常用水处理构筑物的设计计算方法，通过设计能达 到预期的处理效果。 关键词关键词 小区生活污水 活性污泥法 CAST 负荷 第 ii 页 ABSTRACT The processing of the wastewater of biotope is subjected to value more and more in recent years. The characteristic of biotope wastewater is good for bio-chemical. Adoption the biological tr
3、eatment, such as: the activated sludge processing, the slime process etc. The Cyclic activated sludge technology has many advantages, for example: Cyclic activated sludge technology can work steadily and removal organic matter effectly, Cyclic activated sludge technology has excellent ability of bea
4、ring high impact loads, the amount of sludge is small, no sludge swell, the reaction impulses is larger, Cyclic activated sludge technology also can work at low temperatures, and keep high rate to removal. Comparing with the secondary treatment process, the costs of construction and operation of Cyclic activated sludge technology is much lower，operation is simply. According to design mission ,this design chooses Cyclic activated sludge technology to
