医院废水处理毕业设计

二○一四届毕业设计陕西省人民医院污水处理站工艺设计学院：环境科学与工程学院专业：环境工程姓名：丁锐学号：2901100126指导教师：张小玲完成时间：2014年6月10日毕业论文报告纸┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊I摘要医院污水中含有大量的细菌、病毒、寄生虫卵，除此之外，还含有许多无机物和有机物如各种药物消毒剂用于诊断和治疗的放射性同位素等。这些细菌、病毒和寄生虫卵在环境中具有较强的抵抗力，在污水中存活时间较长，对人类的危害很大，很可能使人致病，甚至引起传染病的爆发流行。同时，各种药物消毒剂用于诊断和治疗的放射性同位素排入水体将对水环境造成巨大的危害并长期危害人体健康。因此，医院污水必须进行处理达到相应的标准后，才能进行排放。本方案为陕西省人民医院污水处理站工艺设计，水量为1000t/d，进水水质各指标为COD=550mg/L，BOD5=275mg/L，SS=120mg/L，NH3-N=26mg/L，pH值=7.5~8.5，粪大肠菌群数为106个/L。经过分析和比较，本次设计采用国内外常采用CASS工艺和二氧化氯消毒,CASS生物反应池主要去除污水中的有机物，而向消毒池中投加二氧化氯，则去除水中的有毒有害物质。经过此工艺处理后的污水各种指标预计为COD=80mg/L，BOD5=20mg/L，SS=70mg/L，NH3-N=12mg/L，pH值=6~9，粪大肠菌群数为500个/L，余氯0.5mg/L。主要构筑物有化粪池、格栅间与提升泵房、CASS生化池、接触消毒池、污泥浓缩池等。关键词：医院污水,CASS工艺,二氧化氯消毒毕业论文报告纸┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊IIABSTRACTHospitalwastewaterconsistsofalotofbacteria,virus,parasiticovum,inaddition,hospitalwastewateralsoconsistsofalotoforganicmattersandinorganicmatterssuchasallkindsofsanitizerandradioisotopeusingtodiagnosisandtreat.Thesebacteria,virus,parasiticovum,canaliveinthewastewaterforalongtime,theseisharmfulforhuman’shealthy,andthesecouldprobablyleadtodiseaseevencommunicabledisease.Atthesametime,sanitizerandradioisotopeusingtodiagnosisandtreatdischargeintowavecouldpollutethewaveenvironmentandjeopardizehuman’shealthy.Therefor,hospitalwastewatermustbedealedwithuntillitreachhomologousstandard,thenitcoulddischarge.ThisplanisShanXiPeople’sHospitalProcessingstation,thewateryieldis1000t/d,andtheindicatorsare:COD=550mg/L,BOD5=275mg/L,SS=120mg/L,NH3-N=26mg/L,pH=7.5~8.5,bacilluscoliis106/L.Afterdealing,theindicatorsare:COD=80mg/L,BOD5=20mg/L,SS=70mg/L,NH3-N=12mg/L,pH=6~9,bacilluscoliis500/L,residualchlorine0.5mg/L.themainstructurescontaindigestiontank,thebarscreenroomandpumproom,CASStank,disinfectingtank,sludgestoragetank.KEYWORDS:hospitalwastewater,CASStechnigue,chlorinedioxide毕业论文报告纸┊┊┊┊┊┊┊┊┊┊┊┊┊装┊┊┊┊┊订┊┊┊┊┊线┊┊┊┊┊┊┊┊III目录第一章绪论.....................................................................................................................................11.1医院污水的来源与主要污染物.........................................................................................11.1.1医院污水的来源......................................................................................................11.1.2医院污水的主要污染物..........................................................................................11.2医院污水特征.....................................................................................................................21.2.1医院污水水量特征..................................................................................................21.2.2医院污水水质特征..................................................................................................21.3医院污水处理工艺.............................................................................................................21.4国内外常用工艺及实例.....................................................................................................3第二章工程概述.........................................................................................................................62.1设计背景.............................................................................................................................62.1.1设计水质与水量......................................................................................................62.1.2水质排放标准..........................................................................................................62.1.3设计原则..................................................................................................................62.2工艺比较与论证.................................................................................................................72.2.1生物工艺比选..........................................................................................................82.2.2消毒工艺比选........................................................................................................10第三章工程设计说明...............................................................................................................123.1构筑物设计.......................................................................................................................123.1.1化粪池...................................................................................................................123.1.2格栅井...................................................................................................................123.1.3提升泵房................................................................................................................123.1.4CASS池..................................................................................................................133.1.5污泥浓缩池............................................................................................................143.1.6接触消毒池............................................................................................................143.1.7脱氯池................................................................................................................