和污水处理厂工艺设计摘要环境污染问题是当今世界上最大的社会问题之一，尤其是水资源的过度开发和不合理利用。合理利用水资源是解决这些问题的关键，因此，水处理的发展对我国能否实现可持续的战略目标起着举足轻重的作用。本设计是江苏省昆山市某区的排水工程。其由两部分组成，即，城市排水管网系统的设计和城市污水处理厂的设计。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A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,城市污水的主要成分为有机物，所以本次设计采用了氧化沟工艺。污水在氧化沟内缓慢流动时大量有机物被去除。处理后的水质达到国家规定的《城镇污水处理厂污染物排放标准》（GB1918-2002）一级A标准。允许直接排放入河流和湖泊或用于农田灌溉。处理后的活性污泥经脱水后用于肥料。关键词：城市排水管网；城市污水处理厂；卡鲁赛尔氧化沟；沉淀池；污泥处理AbstractTheproblemofenvironmentalpollutionisnowadaysoneofthegreatestsocialconcernsintheworld,especiallyoverexploitationandunreasonableuseofthewaterresource.Thewaterresourceofrationalutilizationisthekeytosolvingtheseproblems。Sothedevelopmentofwatertreatmentplaysadecisiveroletorealizeourcountrythesustainablestrategicobjective.ThedesignisadrainagesysteminonetomnofKunshanofJiangsuProvince.Itismadeupoftwoparts,namely,thedesignofthesystemofurbandrainagepipelinenetworksanddesignoftheurbansewagetreatmentplant.AandBtwosetsofschemesthatthesystemofdrainagepipelinenetworkshasbeendesignedaltogether,andcomparethroughtechnologicaleconomy,chooseBscheme.Accordingtotomn’sgeographicalpositionandscaleofsewagetreatmentplant,combiningwiththedemandofdenitrificationanddephosphorizationintreatmentprocess,Keywords:urbandrainagepipelinenetworksurbansewagetreatmentplantCarrouselOxidationDitcsettlingtanksludgetreatment目录TOC\o"1-3"\h\z\uHYPERLINK\l"_Toc359015146"摘要PAGEREF_Toc359015146\h1HYPERLINK\l"_Toc359015147"AbstractPAGEREF_Toc359015147\h2HYPERLINK\l"_Toc359015148"1.绪论PAGEREF_Toc359015148\h3HYPERLINK\l"_Toc359015149"概述PAGEREF_Toc359015149\h3HYPERLINK\l"_Toc359015150"目的和意义PAGEREF_Toc359015150\h3HYPERLINK\l"_Toc359015151"2城市排水管网设计与计算PAGEREF_Toc359015151\h4HYPERLINK\l"_Toc359015152"原始资料PAGEREF_Toc359015152\h4HYPERLINK\l"_Toc359015153"设计内容PAGEREF_Toc359015153\h4HYPERLINK\l"_Toc359015154"地形与城市规划资料PAGEREF_Toc359015154\h4HYPERLINK\l"_Toc359015155"2．2城市排水管网设计原则PAGEREF_Toc359015155\h7HYPERLINK\l"_Toc359015156"2.2.1排水系统的规划设计原则PAG