城市污水处理工艺设计(卡鲁塞尔氧化沟)(DOC)

I摘要随着经济的发展，近几年我国水污染控制所面临的问题也愈加严重。我国人均水资源占有量远小于世界平均水平。而水环境污染的加剧与水质的普遍恶化，使得水资源供需矛盾进一步加剧，这导致了人们开始担心饮用水水质的安全性。如何建设全国城镇污水处理及再生利用设施、提升基本环境公共服务水平、促进主要污染物减排和改善水环境质量成为了当下主要的问题。本次毕业设计的题目为城市污水处理厂工程设计，本设计采用卡鲁塞尔氧化沟工艺。本设计的主要内容是工艺流程的选择；构筑物的设计、选型与计算；平面布置和高程布置；绘制城市污水厂平面布置图、高程图、工艺流程图及主要构筑物的施工图。城市污水的水质特点为水中有机物、氨氮浓度较低，可生化性较好，适宜采用生物处理工艺进行处理。本设计的污水处理厂进水水质为：CODcr=220mg/L，BOD5=100mg/L，SS=200mg/L，TN=30mg/L，NH3-N=20mg/L，pH=6～9。经组合工艺处理后，污水处理厂出水水质为：CODcr≤60mg/L，BOD5≤20mg/L，SS≤20mg/L，TN≤20mg/L，NH3-N≤8mg/L，pH=6～9。满足《城镇污水处理厂污染物排放标准》（GB18918-2002）中的一级B标准。关键词：城市污水，卡鲁塞尔氧化沟，生物处理IIDesigningof1.1×105m3/dMunicipalWastewaterTreatmentProcessAbstractWitheconomicdevelopmentinrecentyears,theproblemofwaterpollutioncontrolarealsofacingincreasinglyserious.China'spercapitapossessionofwaterresourcesfarlessthantheworldaverage.Exacerbatethegeneraldeteriorationofwaterqualityandwaterpollution,watersupplyanddemandmakesfurtherintensified.Thishasledpeoplebegantoworryaboutthesafetyofdrinkingwater.Howtobuildthenationalsewagetreatmentandrecyclingfacilitiestowns,enhancethelevelofbasicpublicservices,theenvironment,andpromoteemissionsofmajorpollutantsandimprovethewaterqualityoftheenvironmenthasbecomeamajorproblemthemoment.Thetopicofthethesisisfindingoutsomecombinedtechnologiestotreatthemunicipalwastewater.ThemainofthecombinedtechnologiesisCarrouseloxidationditchprocess.Themaincontentsofthisdesignistheprocessofchoice;structuresdesign,selectionandcalculation;planelayoutandheightlayout;drawtheplantlayoutmaps,heightlayoutmaps,processflowdiagramsandthemainbuildingoftheconstructionplansforthemunicipalwastewatertreatment.Lowconcentrationsoforganicmatterandammoniaisthewaterqualitycharacteristicsofmunicipalwastewater.Anditsuitableforprocessingbiologicaltreatmentprocess.Thedesignofthewastewatertreatmentplantinfluentwaterquality:CODcr=220mg/L,BOD5=100mg/L,SS=200mg/L,TN=30mg/L,NH3-N=20mg/L,pH=6～9.Afteroxidationditchprocess,sewagetreatmentplanteffluentqualityisCODcr≤60mg/L，BOD5≤20mg/L，SS≤20mg/L，TN≤20mg/L，NH3-N≤8mg/L，pH=6～9.Itmeetstheurbansewagetreatmentplantpollutantdischargestandard(GB18918-2002)inaBstandard.Keywords:sewagetreatmentplant,carrouseloxidationditch,feedwaterqualityofeffluent.I目录第一章绪论.....................................................................................................................................11.1城市污水的主要来源................................................................................................................11.2城市污水的水质水量特点........................................................................................................11.3城市污水处理现状....................................................................................................................21.4城市污水的处理方法................................................................................................................31.4.1物理处理方法.........................................................................................................................31.4.2化学处理方法.........................................................................................................................31.4.3生物处理方法.........................................................................................................................31.5本设计的意义及主要研究内容................................................................................................4第二章设计说明.............................................................................................................................62.1设计概述....................................................................................................................................62.1.1设计任务.................................................................................................................................62.1.2设计依据.................................................................................................................................62.1.3去除率.....................................................................................................................................62.2方案选择....................................................................................................................................62.2.1确定污水处理方案的原则.....................................................................................................72.2.2污水处理方案的比选.............................................................................................................72.2.3格栅.........................................................................................................................................92.2.4沉砂池.....................................................................................................................................92.2.5氧化沟.....................................................................................................................................92.2.6沉淀池...................................................................................................................................112.2.7接触池..........................................