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摘要Ⅰ摘要本次毕业设计是以相关的资料为依据,设计一座城镇污水处理厂.其日处理量近期为10万立方米。由于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.主要任务是工艺流程选择及构筑物设计和计算。该污水处理厂的污水处理流程为：污水经过粗格栅，由泵房提升后流过细格栅，进入沉砂池，再进入氧化沟，二沉池，最后排入江河。在完成污水和污泥处理构筑物的设计计算后,根据平面布置的原则,综合考虑各方面因素进行了污水厂的平面布置。据污水的流量对连接各构筑物的管渠进行了选径、确定流速以及水力坡降,然后进行了水力损失计算。据水力损失计算对污水和污泥高程进行了计算和布置。在最后阶段完成对平面图、高程图及各种主要的构筑物的绘制。关键词：污水处理；Carrousel氧化沟；脱氮除磷；污泥浓缩茂名学院本科毕业设计：Carrousel氧化沟城镇污水处理厂的设计ⅡAbstractThisgraduationprojectistaketherelatedmaterialasthebasis,designsatownsewagetreatmentplant.Itsdayprocessloadinthenearfuturewillbe100,000cubicmeters.Becausethecitysewageprincipalconstituentisanorganicmatter,thereforethisdesignhasusedtheoxidationditchcraft.Themaintaskistheselectionsofprocessflowandthedesignsandcalculationconstructionsusedinprocessflow.Theprocessofthesewagetreatmentplant:sewagecomeacrossthecoarsegrille,sewagewasliftedupbypumpandflowbythin-case-bar,andthenitentersthelaminarflowsandpool,oxidationditch,secondarysedimentationtank,finallyThewaterfallsoutthroughapipealongwayouttoriver.Afterfinishingcalculationofdesign,accordingtoprincipleoflaying,considerthefactorssyntheticallytoconfirmtheplaceofthesewagefactory.Accordingtoflowvolumeofsewagewecanselectthefoot-path,confirmthevelocityofflowandwaterconservancyslope,thencalculatewaterconservancylosses.Intheend,Floorplan,profileinelevationandtheothermainlystructuresdrawingmustfinished.Keywords：watertreatment;Carrouseloxidationditch;PhosphorusSewageandNitrogen;Sludgeconcentratio目录Ⅲ目录摘要.........................................................................................................................................1Abstract.....................................................................................................................................2第一章设计概论.....................................................................................................................51.1设计依据和设计任务.................................................................................................51.1.1原始依据..........................................................................................................51.1.2设计内容和要求..............................................................................................51.1.3设计目的..........................................................................................................61.2进出水水质.................................................................................................................6第二章工艺流程的确定.........................................................................................................72.1城市污水处理发展和现状.........................................................................................72.1.1目前存在的问题..............................................................................................72.1.2今后的发展趋势..............................................................................................82.2污水生物处理方法比较.............................................................................................82.3工艺流程的确定.......................................................................................................132.3.1工艺流程........................................................................................................132.3.2污水处理部分................................................................................................142.3.2污泥处理部分................................................................................................152.4物料衡算...................................................................................................................17第三章污水处理系统...........................................................................................................183.1粗格栅.......................................................................................................................183.2污水提升泵房...........................................................................................................203.3细格栅.......................................................................................................................213.4沉砂池.......................................................................................................................223.5均质池.......................................................................................................................243.6氧化沟.......................................................................................................................253.7配水井.......................................................................................................................303.8二沉池.......................................................................................................................313.9接触消毒池...............................................................................................................333.10加氯间.....................................................................................................................343.11污泥回流泵房.................................................................................................