毕业设计cass工艺处理生活污水辽工大.docVIP

中文题目：阜新市万m3·d﹣1生活污水处理CASS工艺设计THE FUXIN CITY 50000m?dSEWAGE TREATMENT PLANT CASS PROCESS DESIGN 毕业设计（论文）共 页 图纸共 张 完成日期 2013年 6月 答辩日期 2013年 7月 摘要 本设计主要工艺是使用CASS技术处理生活污水。循环活性污泥法CASS工艺是一种将变容积活性污泥法和生物选择器原理有机的结合起来，具有同步脱氮除磷的特点，并以序批曝气-非曝气方式运行的间歇活性污泥处理工艺。本设计在总体布局上简单有序，在进水口设置格栅，主要除去污水中较大的漂浮物和悬浮物；接下来设置两座沉砂池，主要除去污水中细小的无机颗粒；还设置了滤池，处理方法除去污水中的悬浮物；并且本设计设置CASS工艺作为除去污水中有机物的生物处理工艺。CASS池的前部是生物选择区，即预反应区，后部为主反应区，其主反应区后装了可升降自动撇水装置。整个工艺的曝气、沉淀、排水在同一池子内周期循环运行，省去了常规活性污泥法的二沉池和污泥回流系统;同时可连续进水，间断排水。 关键词：CASS工艺;处理生活污水;连续进水;间断排水 Abstract CASS cycle activated sludge short is developed on the basis of the SBR process. That is a biological selector increase in SBR pool water side, to achieve a continuous flow, intermittent drainage. The main purpose of the bio-selector is to enable the system to choose a flocculation bacterium, its volume to about 10% of the entire pond. Biological selection process to follow the accumulation of activated sludge matrix -reproduction theory, so that the activated sludge in the adsorption process wherein experiencing a high load, then in the primary reaction zone through a lower load matrix degradation stage, in order to complete the entire the whole process of matrix degradation and sludge regeneration. The process as early as applications in foreign countries, in order to better its introduction digestion development of a new sewage treatment process suitable for Chinas national conditions, the General Armament Department, Engineering and Research Institute Environmental Protection Center in 1994 in the laboratory of the entire system simulation experiment, investigate the effect of nitrogen and phosphorus removal mechanism and characteristics of the CASS process at room temperature sewage, cold domestic sewage, pharmaceutical and chemical industrial wastewater treatment process, valuable design parameters and process operation guiding experience. CASS front of the pool area of biological selection procreation zone, the rear of the main reaction zone, the water ca