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1、毕业设计说明书污水厂CASS工艺南通某经济开发区污水处理厂设计 摘要：本设计主要是南通市某经济开发区污水处理厂的设计，该污水厂位于经济开发区，根据对原水水质的分析，以及参考大量的污水处理资料，综合考虑技术、经济等因素，最终采用现行的SBR变形形式CASS工艺。CASS是周期循环活性污泥法的简称，又称为循环活性污泥工艺，是在SBR的基础上发展起来的，即在SBR池内进水端增加了一个生物选择器，实现了连续进水(沉淀期、排水期仍连续进水)，间歇排水。该污水厂设计的流程为进水粗格栅提升泵房细格栅平流沉砂池CASS池普快滤池消毒池出水。污泥的处理流程为CASS污泥提升泵房储泥池浓缩池。该厂出水达到设计要求
2、。 关键词：污水处理厂；CASS；污泥处理 I Factory design of an Economic Development Zone Wastewater Treatment in Nantong Abstract: This design is the design of wastewater treatment plant of a economic development zone of Nantong City, the sewage treatment plant is located in the economic development zone, based on th
3、e analysis of the raw water quality, sewage and reference data processing large, comprehensive consideration of technical, economic and other factors, the current SBR deformation form of CASS process. CASS is a cyclic activated sludge method abbreviation, also known as cyclic activated sludge techno
4、logy, is in the SBR developed on the basis of SBR, namely in the pool water inlet end adds a biological selector, realizes continuous water (precipitation, drainage period is still continuous, intermittent drainage.). The design of wastewater treatment plant process water, coarse grid, pumping stati
5、on, fine grid, advection sedimentation tank, CASS tank Pukuai filter, disinfection pool, water. Treatment process of sludge is CASS, sludge pumping station, sludge storage tank, concentrated pool. The effluent can meet the design requirements. Key words: Sewage treatment plant; CASS; sludge disposal
6、 II 目 录 摘要 . I Abstract . II 1 绪论 . 1 11 课题研究意义 . 1 2污水厂概况 . 1 2.1地理位置及气候 . 1 2.2设计规模及进出水水质 . 2 2.3 处理程度的计算 . 2 3 城市污水处理设计 . 2 3.1污水处理工艺流程选择 . 2 3.2 工艺比较 . 3 3.2.1氧化沟方案 . 3 3.2.2 CASS工艺方案 . 4 3.3方案的确定 . 6 3.4工艺流程图 . 6 4 污水处理构筑物的设计说明 . 7 4.1 粗格栅的设计 . 7 4.1.1 格栅尺寸 . 7 4.1.2 通过格栅的水头损失 h1 . 8 4.1.3 栅后槽总高度 H . 8 4.1.4 栅槽总长度 L . 8 4.1.5 每日栅渣量 W . 9 4.1.6 格栅的选择 . 9 4.2提升泵房 .
