1、 学生毕业设计 题 目 *县污水处理厂 初步设计 作 者 院 (系) 建筑工程系 专 业 给水排水工程 指导教师 答辩日期 2013 年 5 月 18 日 I 摘 要 现今，全国人民的生活水平不断提升，但同时由于基础设施的更新落后导致 环境污染日益严重。故加大城市的污水处理力度势在必行。在这个大前提下，现 拟在*县城区建一座污水处理厂。近期处理规模为 20000m3/d，设计出水水质达 到城镇污水处理厂污染物排放标准GB18918-2002 一级 B 类标准。 本设计中，经过多种处理工艺的比选，最终采用 CASS 工艺。该工艺是 SBR 工艺中的一种新工艺，它解决了 SBR 法的缺点，使 SB
2、R 工艺又获得了进一步改 善。CASS 工艺具有占地少，可靠性好，运行管理方便等优点，适合大中型污水 处理厂使用。 本设计包含污水处理工艺流程的确定，主要构筑物的设计计算，施工图的绘 制等。 关键词关键词：柳林县；污水处理厂；CASS 工艺 II Liulin County, Lvliang City wastewater treatment plant preliminary design ABSTRACT Nowadays, peoples living standard all over the country has been continuously improved, but th
3、e environment was seriously polluted because the infrastructures were not updated timely. Therefore, it is imperative to process the polluted urban sewage. In this context, supposing to build a wastewater treatment plant in liulinCounty,lvliangCity. Recently, its processing scale is 3000m3/d,the des
4、igns water leakage water quality may achieve “Sewage Emission standardof small town” (GB18918-2002) the primary standard of B. In this design, from electing a variety of technologies which are necessary, eventually, I adopt the CASS process, which is a new technology of SBR, and can solve the defect
5、 of SBR. Meanwhile, the CASS technology alsofurther improved the SBRtechnology. The CASS technologyhave some advantages, such as little in occupy land, good reliability, convenient in the operation of management, which is appropriate for large and medium-sized wasterwater treatment plant. The design
6、 includes the identifying of the process of the sewage treatment, the calculation and design of the main structures and the protracting of thedrawing construction, etc. Key words:liulinCounty; wastewater treatment plant; CASS process III 目 录 摘 要 . I ABSTRACT II 1 原始资料分析 .1 1.1 自然条件 1 1.1.1 地形地貌 .1 1.1.2 气象 1 1.2 污水水质 1 1.3 处理要求 2 1.4 处理程度 2 2 城市污水处理方案的确定 3 2.1 确定处理方案的原则 3 2.2 污水处理方案的选择 3 2.2.1 氧化沟工艺 5 2.2.2 AB法（A+A2/O） .6 2.2.3 循环施活性污泥法（CASS 工艺）7 2.2.4 方案确定 .8 3 处理构筑物设计 9 3.1 粗格栅间设计 .
