城市污水处理厂工艺系统方案设计 毕业论文 .doc

摘 要 水资源是经济可持续发展的基本保证，废水的任意排放或处理不彻底的排放，都会给水资源环境带来严重的污染问题。随着工业生产的发展和人民生活水平的提高，水资源短缺问题尤为突出，水体受到严重的污染，当地自然环境正受到严重的威胁，并且已经影响到经济的发展和人民正常生活，建设排水工程已成为迫在眉睫的大事。 基于上述原因，本设计在分析该市水质资料、人口和气象条件的基础上，对污水处理厂进行设计。包括对进出水质与水量进行了分析、对污水处理厂以卡鲁塞尔氧化沟工艺为主体的处理工艺流程的选择给予了说明，并对污水及污泥构筑物单体进行了详细的设计和计算。 关键词：城市污水处理 卡鲁赛尔氧化沟 污水处理构筑物 Abstract Water resources ensure the sustaining development of economy. Wastewater could result in serious pollution to water resources when it is discharged carelessly or treated incompletely. With the development of industry and the increase of living standard, the shortage of water is conspicuous day by day. A great amount of domestic and industrial waster water is discharged without proper treatment, which pollutes the river seriously. The damaged environment is endangering the development of economy and local people’s lives. For this reason, the construction of sewage system and drainage system has become an urgent issue. The designs of sewage system, drainage system and wastewater treatment plant are on the basis of given wastewater materials pertaining to hydrology, geology, population and meteorology. The following parts are also included: the analysis of water quantity and water quality, the explanation of the selection of secondary treatment process which is mainly around Carrousel O.D process, the detailed calculation of each unit relating to wastewater treatment process or sludge process. Finally, the evaluation and calculation of total cost are given. Keywords：Urban wastewater treatment；Carrousel O.D； Sewage treatment structure； 目 录 一、设计题目 4 二、设计目的 4 三、设计任务 4 四、设计基础资料 5 五、污水处理厂工艺流程确定 7 5.1处理流程确定 7 5.1.1确定原则 7 5.1.2方案确定 8 5.1.3处理流程图 11 5.2单元构筑物选择 11 5.2.1格栅选择 11 5.2.2沉淀池选择 11 5.2.3氧化沟选择 12 5.2.4二沉池选择 13 5.2.5污泥浓缩池 14 5.2.6污泥脱水设备 14 六、设计计算 14 6.1分流井 14 6.2粗格栅 15 6.2.1设计参数 15 6.2.2设计计算 16 6.3提升泵房 18 6.3.1设计要求 18 6.3.2设计计算 19 6.4细格栅 19 6.4.1设计参数 19 6.4.2设计计算 20 6.5沉砂池 22 6.5.1设计参数 22 6.5.2设计计算 22 6.6生物反应池 24 6.6.1设计参数 24 6.6.2设计计算 24 6.7二沉池