(整理)倒置A2O工艺

--------------------------摘要水是人类的生命之源。水污染危害人体健康、渔业和农业生产，还会对生态系统造成危害，所以对水污染治理是势在必行的。本设计是辽宁省沈阳市的城市排水工程。本设计的目的是缓解当地城市发展与环境保护之间的矛盾，改善居民生活环境，提高城市形象。设计内容包括城市排水管网系统的设计、城市污水处理厂的设计和投资估算与技术经济评价。排水管网系统共设计了A和B两套方案，经过技术经济比较，选择B方案。根据城市所处的地理位置和污水厂的规模，并结合考虑需脱氮除磷的要求，城市污水处理厂设计采用倒置A2/O（RAAO）工艺。该工艺污水处理流程为：粗格栅→泵房→细格栅→钟式沉砂池→初沉池→缺氧池→厌氧池→好氧池→二沉池→消毒池→巴氏计量堰→出水排放。通过此工艺的处理，出水水质将达到《城镇污水处理厂污染物排放标准》（GB18918-2002）一级B标准。关键词城市排水管网；污水处理厂；倒置A2/O工艺；脱氮除磷；污泥处理--------------------------AbstractWaterisdescribedastheessentialnaturalresourcesinpeople’slife.Waterpollutionishazardoustohuman’shealth,fisheryandagriculture,andalsocanbeharmfultoeco-system.Thus,itisimperativetocontrolwaterpollution.ThisprojectionisadrainagesystemofShenyang,LiaoningProvince.Itaimstoprotecttheresidentialenvironmentandenhancethecityimage.Designofurbandrainagepipelinenetwork,designoftheurbansewagetreatmentplant,investmentestimateandtechnicalandeconomicevalua-tionofthesewagetreatmentplantareincludedinthisprojection.Twosetsofschemesofthedrainagepipelinenetworkaredesignedaltogether.Aftercomparedintechnicalandeconomicaspects,schemeBischoosen.Accordingtothecity’sgeographicalpositionandscaleofthesevagetreatmentplant,combiningwiththedemandofdenitrificationanddephosphorizationinthetreatmentprocess,thesewagetreatmentplantisdesignedasRAAOtechnology.Thesewagedisposalprocedureis:thecoarsegrille→thepumpingstation→thefinegrille→thegritpool→thepreliminaryset-tlingtank→theanoxcpool→theanaerobicpool→theoxicpool→thesecondarysettlingtank→thedisinfectiontank→Parshallflume→dischargedintotheriver.Afterthetreat-mentofthistechnology,thequalityofwaterdisposedwillreachthefirstclassBstandardof《pollutantdischargestandardofurbansewagetreatmentplant》(GB18918-2002).Keywords：urbandrainagepipelinenetworks,urbansewagetreatmentplant,RAAO,denitrificationanddephosphorization,sludgetreatment----------------------------------------------------目录摘要.................................................................................................................IAbstract..............................................................................................................II第1章绪论.......................................................................................................11.1概述......................................................................................................................11.1.1城市概况.....................................................................................................11.1.2设计范围.....................................................................................................11.1.3设计任务.....................................................................................................11.2设计资料..............................................................................................................21.2.1地形与城市规划资料.................................................................................21.2.2气象资料.....................................................................................................21.2.3地质资料.....................................................................................................31.2.4受纳水体水文与水质资料.........................................................................3第2章排水管网的规划设计.............................................................................42.1城市排水管网定线原则......................................................................................42.1.1排水工程规划设计的基本原则.................................................................42.1.2排水管网的管道定线原则.........................................................................52.2排水体制确定及区域划分..................................................................................52.2.1排水体制的选择.........................................................................................52.2.2排水区域的划分.........................................................................................62.3排水系统的布置形式..........................................................................................62.4污水管网设计计算..............................................................................................72.4.1水量计算公式.............................................................................................72.4.2污水管网的水力计算.................................................................................82.5计算机计算说明..................................................................................................82.6污水管道水力计算的设计数据........................................................................102.6.1基本原则...................................................................................................102.6.2污水管道水力计算时应注意的问题.......................................................112.7污水管道水力计算结果....................................................................................11第3章雨水管渠设计......................................................................................13--------------------------3.1雨水管渠系统平面布置的原则........................................................................133.2雨水管渠设计流量的确定................