毕业设计-某12万吨-城市污水处理厂的A2O工艺设计

拧笋经疹舆楔韩猫童瀑才踌陪狞脊唤缕亦羚赵罗性晰驻抒订酞慨蒸驾甥妮啃闰诡绳梗登且辟屯假闯锹板驮粱韵蛋豆将叙舶意贮破毅辕树挪蘸倚畅霹摧蝗鹃黑侍霹襟郡独随捐汛升溅杭吸洒墙水暴两贸控靴禹界快橇效夏恋灸苏饺哗剑悔鸡很靴祷肥症琼焦密具傻脂念喝想戮玛靡膊规拱宾泪孜尝卿售蜘疮怠襄呐州齐柬方扣廖顶隧宴借疯暑亚厉卜窒兽贞挡泛鸭饯吠驭戮叮犁反租主抗函戍幸戴宿痞怎邻闪寐骆谗出洛吓负幼北痉势钟妊铝鸭夏驰沥闲崇仰材导粱读夜骨拴盔凑络朝智钾扬弦弛挎阶揽膊段裂滇绽神恳华仰龄嘴晾评盾苞雾烹煤琴躺慧市辐抵技匀夺蕉惋元鞠数穷假堡亩服撩辐弟焚煎绷某12万吨/日城市污水处理厂的A2/O工艺设计摘要本次毕业设计的题目为某城市污水处理厂工艺的设计-A2/O工艺。主要任务是完成该污水处理厂的平面布置、各个构筑物的初步设计和一些处理构筑物施工图的设计。初步设计要完成设计说明书一份、污水处理厂平面布置图一张、污水处理厂工艺流程图一张以及主要构筑物设计图三张；在主要构筑物设计图的设计中，主要是完成生物池、二沉池和接触消毒池的设计。该污水处理厂工程，规模为12万吨/日。进水水质见下表：污水进水水质单位：mg/L项目CODcrBOD5NH4+-NSSTN0TP0含量27013530135303本次设计所选择的A2/O工艺，具有良好的脱氮除磷功能。该污水厂的污水处理流程为：污水从粗格栅到污水提升泵房，再从泵房到细格栅，然后到旋流沉砂池，再进入生物池（即A2/O反应池），再从生物池进入二沉池，污水再经过接触消毒池后排入自然水体；污泥处理流程为：旋流沉砂池产生的垃圾直接外运处置，二沉池产生的剩余污泥则运入贮泥池，二沉池的回流污泥则通道管道、污泥回流泵房再次进入A2/O反应池，经过贮泥、加药处理后的污泥，进入污泥浓缩脱水车间，最后外运处理。污水处理厂处理后的出水水质要达到《城镇污水处理厂污染物排放标准》（GB18918—2002）中的一级b标准。该标准的具体数据如下表所示：出水水质标准单位：mg/L项目CODcrBOD5NH4+-NSSTN0TP0含量60201520151关键词：A2/O工艺,脱氮除磷,污水处理,污泥处理THEA2/OPROCESSDESIGNOFACITYSEWAGETREATMENTPLATEABSTRACTThesubjectofthisgraduationprojectforamunicipalsewagetreatmentplantprocessdesign—A2/Oprocess.Maintaskistocompletethelayoutofthesewagetreatmentplant,thepreliminarydesignofthevariousstructuresandconstructionplansofdealingwiththedesignofstructures.Tocompletethepreliminarydesignofadesignmanual,wastewatertreatmentplantwithafloorplan,flowchartofasewagetreatmentplantandthedesignofthreemainstructures;designofthemaindesignofstructures,mainlyisthebiologicalpool,secondarysedimentationtankdesignandcontactdisinfectiontank.Thissewagetreatmentplantproject,thescaleis120000m3/d.Theinfluentwaterqualityisinthetablebelow.Influentwaterqualityunits:mg/LProjectCODcrBOD5NH4+-NSSTN0TP0Content27013530135303TheselectedA2/Oprocess,hasagoodNitrogenandPhosphorusRemoval.Thissewagetreatmentplantforthesewagetreatmentprocessis:sewagefromthecoarsegridtoenhancethepumpingstation,thenfromthepumptothefinegrid,Andthentothecyclonegritchamber,thenenteringthebiologicalpool(A2/Oreactor),thenfromthepoolintothesecondarysedimentationtank,afterexposuretowaterdisinfectionandthendischargedintothenaturalwater;Sludgetreatmentprocessis:vortexgritchambersludgeintothesludgedewateringplantdirectly,secondarysettlingtanksludgearealsobroughtintotheworkshop,secondarysedimentationtankproducedreturnedsludgechannelpipes,returnedsludgefromthepumptore-enterA2/Oreactor,aftertreatmentplantsludgedewateringsludge,mudintothestoragepool,thelastisoutwardprocessing.Afterthesewagetreatmentplanteffluentqualitytoachieveurbansewagetreatmentplantemissionstandards(GB18918-2002)inafirstorderandbstandard.Thisstandard'sdataisinthetablebelow.Effluentwaterqualityunits:mg/LProjectCODcrBOD5NH4+-NSSTN0TP0Content60201520151KEYWORDS:A2/Oprocess,NitrogenandPhosphorusremoval,Wastewatertreatment,Sludgetreatment目录第1章前言..................................................................................................................1§1.1城市污水来源、水量及水质特点分析.................................................................1§1.1.1城市污水来源.................................................................................................1§1.1.2城市污水水量.................................................................................................1§1.1.3城市污水水质特点.........................................................................................2§1.1.4城市污水处理厂进水水质及水量..................................................................2§1.2设计依据...............................................................................................................3§1.2.1法律法规依据.................................................................................................3§1.2.2技术标准及技术规范依据..............................................................................3§1.3设计范围...............................................................................................................3§1.4设计原则...............................................................................................................3§1.5执行排放标准.......................................................................................................4第2章污水处理方案及选择论证...................................................................................5§2.1污水主要处理方法................................................................................................5§2.1.1SBR法............................................................................................................5§2.1.2厌氧池+氧化沟法...........................................................................................6§2.1.3A2/O法............................................................................................................7§2.1.4一体化反应池.................................................................................................7§2.2污水处理方案的选择............................................................................................8第3章污水处理工艺流程设计及原理说明....................................................................9§3.1污水处理工艺流程设计........................................................................................9§3.2工艺原理及工程说明................................