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-I-摘要水资源是经济可持续发展的基本保证，污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。山东省东部德州市人口众多，属水资源短缺的地区之一。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。由于该市排水系统很不完善，大量的城市污水、工业废水无法及时处理，是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，本设计在充分调研该市水文地质、受纳水体水质资料、人口分布和气象条件的情况下，对包括排水管网和污水处理厂的整套排水设施进行设计。其中，对进水水质、出水水质进行分析，污水处理厂一级、以及以A/O法为主体的二级处理工艺流程的选择给予说明，对具体污水及污泥构筑物结构进行了详细计算。本文将技术经济分析评价贯穿于设计的全过程，力求使工程项目达到经济最优化。关键词城市污水处理厂进水水质A/O法污泥处理-II-AbstractWaterresourcesensurethesustainingdevelopmentofeconomy.Sewagedischargedatrandomorhalftreatedcanexposeseriouspollutiontothewaterresources.CityDezhoulocatesateastofShandongprovince.Itisapopulousregionwheretheshortageofwaterissevere.Withthedevelopmentofindustryandtheraiseoflivingstandard,theshortageofwaterisevidentdaybyday.Greatamountofdomesticandindustrialwasterwaterisdischargedwithoutpropertreatment,whichpollutestheriverbadly.Thedamagedenvironmentisendangeringthedevelopmentofeconomicandpeople’slife.Thebuildingofwaterdrainagesystemisamust.Thedesignbasedonthehydrological,geologicalandreceivingwatermaterials.Itincludesthedistributionofwasterwaterdischargesystemanddesignofwastewatertreatmentplant.Specifically,itreasonsthechoiceofprimaryandsecondarytreatmentprocess—A/Oprocess,thecalculationofconstructingprocess.Meanwhile,evaluateandcalculatethetotalcostoftheproject.Keywordsurbanwastewatertreatmentplant,receivingwater,inflowquality,outflowquality,A/Oprocess,sludgetreatment-1-目录摘要.........................................................................................................................IAbstract....................................................................................................................II第1章绪论............................................................................................................11.1毕业设计背景..................................................................................................11.2毕业设计资料..................................................................................................2第2章编制依据和设计内容...............................................................................42.1自然状况...........................................................................................................42.1.2地质资料...............................................................................................42.2A市目前状况...................................................................................................52.2.1城市各区人口密度及污水量标准.......................................................52.2.2工业企业与公用建筑的排水量水质资料...........................................52.3研究设计内容..................................................................................................62.3.1方案选择与工艺设计计算要求...........................................................62.3.2绘图要求...............................................................................................6第3章排水管网规划设计...................................................................................83.1排水管网规划设计原则..................................................................................83.1.1设计基本原则.......................................................................................83.1.2排水体制（sewwersystem）的确定..................................................83.2排水管网的定线..............................................................................................93.3排水管网水力计算........................................................................................103.3.1水力计算的基本公式.........................................................................113.3.2污水管道的最小埋设深度.................................................................123.3.3在管道水力计算中还应注意以下问题.............................................133.4污水管道水的电算........................................................................................143.5排水管网方案的技术经济比较....................................................................153.5.1方案Ⅰ的经济概预算.........................................................................153.5.2方案Ⅱ的经济概预算.........................................................................163.6雨水管道的水力计算....................................................................................16-2-3.6.1设计要点.............................................................................................163.6.2雨量分析.............................................................................................173.6.3管渠流量的确定.................................................................................173.6.4水力计算.............................................................................................19第4章污水处理厂设计计算.............................................................................204.1污水处理厂位置的选择................................................................................204.2污水处理工艺流程的选择............................................................................204.3污水处理程度的确定....................................................................................224.3.1设计流量及设计人口数计算.............................................................224.3.2污水水质污染程度.....