混合化工废水处理工艺设计毕业(论文)设计论文.doc

东北大学秦皇岛分校毕业设计（论文）第页PAGEXCII毕业设计（论文）混合化工废水处理工艺设计学院资源与材料学院专业环境工程班级学号xxxxx学生姓名xxx指导教师Xxx2014年6月17日东北大学秦皇岛分校毕业设计（论文）第PAGE\*MERGEFORMAT103页混合化工废水处理工艺设计摘要本设计针对南方某小城镇混合化工废水，采用以A/A/O工艺为主体工艺的设计方案。进水由20万人口生活污水与1.5万吨工业废水混合而成，平均日进水量为47000m3/d，最高日进水量为61080m3/d。污水进水水质为：CODCr=448mg/L；BOD5=216mg/L；SS=214mg/L；NH3-N=39mg/L；TN=66mg/L；TP=6mg/L。污水处理主路线为：污水通过中格栅后进入提升泵房，然后通过细格栅、旋流沉砂池、电磁流量计、辐流式初沉池等一级处理构筑物，进入二级处理构筑物A/A/O生物反应池、然后经过辐流式二沉池、接触消毒池、巴氏计量槽后，排入Ⅲ类水体，实行《城镇污水处理厂污染物排放标准》一级B标准，初沉污泥和剩余污泥经过污泥浓缩和脱水后进入污泥最终处置系统。各类污染物的去除率为：CODcr≥87.7%；BOD5≥90.7%；SS≥89.8%；NH3-N≥79.5%；TN≥63.6%；TP≥80.0%。污水处理厂总投资费用为4493.06万元，运营费为728.79万元/年，处理成本为0.29元/吨。经计算，本污水处理设计满足相关要求。关键词：污水处理，A/A/O，脱氮除磷，工艺设计DesignOfSewageTreatmentPlantOfMixedChemicalWastewaterAuthor:xxxTutor:xxxAbstractThisdesignisusedforthetreatmentoftheurbansewagewhichcontainschemicalsewageinthesouthofChina，andtheA2Oprocessisusedasthemainprocess.Theinfluentsewageisconsistoftheurbansewagedischargedby200,000peopleand15,000tonsindustrialsewage.Theaverageofdailywaterflowis47000m3/d,andthehighestdailyflowis61080m3/d.ThequalityofinfluentwaterofCODCris448mg/L,BOD5is216mg/L;SSis214mg/L;NH3-Nis39mg/L;TNis66mg/L;TPis6mg/L.Themainrouteforthetreatmentissewageflowthroughthemediumgrill,thenflowintopumpingstation,andthenflowsthroughafinegrid,rotationalflowgritchamber,electromagneticflowmeter,thenitflowsthroughtheprimarysettlingtank,A/A/Obiologicalreactiontank,secondarysedimentationtank,disinfectingtank,finallyitflowsthroughPAPmeteringtankpourintoⅢclasswater.AllofthisprocesscarriesouttheBstandardofthestandardofpollutantsformunicipalsewagetreatmentplant.ThevariouspollutantsremovalisCODcr≥87.72%;BOD5≥3.06%;SS≥90.65%;NH3-N≥82.05%;TN≥87.88%;TP≥80.00%.Thetotalinvestmentcostofthewastewatertreatmentplantis44.9306millionyuan,andtheoperatingcoststhetreatmentcostsis7.2879millionyuaneveryyear,andthecostsis0.29yuaneveryton.Aftercalculation,thesewagetreatmentdesignmeettherelevantrequirements.KeyWords:SewageTreatment,A/A/O,NitrogenandPhosphorusRemoval,Processdesign目录TOC\o"1-3"\h\z\