摘要本次毕业设计的题目为xx市某污水处理厂工艺设计——倒置AAO工艺。设计主要任务是根据该市污水性质、排污规模的要求完成污水处理厂初步设计和单项处理构筑物设计。其中污水处理厂初步设计要完成设计说明书一份、污水处理厂总平面图一张及污水处理厂污水与污泥高程图一张;单项处理构筑物设计中,主要是完成主体处理构筑物平面图及剖面图及部分大图样。该污水处理厂工程,规模为7万吨/日。该污水处理厂的污水处理流程为:污水由市政排水管网经格栅由泵房提升进入到涡流沉砂池,进入倒置AAO反应池,进入辐流式二沉池,进入接触池,最后出水;污泥的流程为:从二次沉淀池池排出的剩余污泥进入回流污泥泵房,再由污水泵送入浓缩池,再进入储泥池,由浓缩污泥泵房提升送入污泥脱水间,最后泥饼外运处置。污水处理厂处理后的出水优于国家污水综合排放标准(GB)中的二级标准。所选择的倒置AAO工艺,具有良好的脱氮除磷功能。关键词:倒置AAO工艺,脱氮除磷ABSTRACTThetopicofthisgraduatedesignisaboutthedesignofthesewagetreatmentplantinthedevelopmentareaofeconomyandtechonologyinDalianCity.ThetechnicsoftheplantistheinvertedAAOprocess.Themaintaskistheprimarydesignoftheplantandtheshopdrawingoftheoxidationditchpond.Thetaskoftheprimarydesignisthatadesignbook、aplanoftheplant、thehighdrawingofthetreatmentofsludgeandsewage;Inthesingledisposalbuilddesign,theharvestisthatthesectionplanedrawing、theplanandsomepartmagnifyingdrawingsoftheinvertedAAOprocess.Theconstructionofthisplantis70000tonperday.Theprocessofthesewageintheplantisthat:Thesewagerunsfrompumphousetosandsinkingpond,entersthepondofsedimentationtank,entersdisinfectionpond,thenenterscalculationtrough,atlastletsout.Theprocessofthesludgeisthat:Surplussludgefromthesedimentationtankentersconcentrationpond,entersdigestionpong,thenitisdehydrated,atlastitiscarriedoutoftheplant.TheoutletwateroftheplantmeetstheleveltwooftheNationalSewageDischargeStandard(GB8978-1996).ThereisaninvertedAAOprocesspreventssludgefromeapending,promotsreleasingphosphorus,andstrengthensanti-nitration.Keywords:TheinvertedAAOprocess,Takingoffthenitrogenandthephosphorus目录摘要..............................................................IABSTRACT..........................................................II前言..............................................................1第一部分设计说明书................................................2第一章设计概论....................................................21.1设计任务....................................................21.2设计目的....................................................21.3设计要求....................................................21.4设计数据及材料..............................................31.5处理程度的计算..............................................4第二章总体设计....................................................52.1工艺比较选择................................................52.2主要生产构筑物工艺设计.....................................162.2.1格栅间...............................................162.2.2污水提升泵房.........................................162.2.3沉砂池...............................................162.2.4倒置AAO池...........................................172.2.5鼓风机房.............................................172.2.6二次沉淀池...........................................172.2.7接触消毒池...........................................182.2.8回流污泥泵房..........................................182.2.9污泥浓缩池...........................................182.2.10脱水车间............................................19第三章污水处理厂总体布置.........................................203.1污水厂平面布置.............................................203.1.1污水处理厂平面布置的原则.............................203.1.2污水处理厂的平面布置.................................223.2污水厂的高程布置...........................................223.2.1污水处理厂高程的布置方法.............................223.2.2本污水处理厂高程计算.................................24第四章组织结构与人员编制.........................................27第五章污水厂投资估算.............................................285.1土建部分...................................................285.2设备部分...................................................295.3总投资费用.................................................295.4经济效益分析...............................................30第二部分设计计算书...............................................31第一章设计流量...................................................311.1设计规模...................................................311.2设计最大流量...............................................31第二章格栅设计计算...............................................32第三章泵房设计计算...............................................35第四章沉砂池设计.................................................364.1工作原理...................................................364.2设计数据...................................................37第五章倒置AAO生物反应池设计计算.................................39第六章二次沉淀池设计计算.........................................50第七章接触消毒池设计计算.........................................547.1液氯消毒工艺设计计算.......................................547.2接触池设计计算.............................................55第八章污泥浓缩池设计计算.........................................56结语.............................................................59参考文献..........................................................60致谢.............................................................62前言在维系人的生存、保障经济建设和维护社会发展的所有自然要素中,水的重要性毋庸赘述。然而随着工业化、城市化加快,世界面临着水资源短缺、污染严重的挑战。在中国尤其严重,中国是世界13个缺水国家之一,全国600多个城市中目前大约一半的城市缺水,水污染的恶化更使水短缺雪上加霜:我国江河湖泊普遍遭受污染,全国75%的湖泊出现了不同程度的富营养化;90%的城市水域污染严重,南方城市总缺水量的60%---70%是由于水污染造成的;对我国118个大中城市的地下水调查显示,有115个城市地下水受到污染,其中重度污染约占40%。水污染降低了水体的使用功能,加剧了水资源短缺,对我国可持续发展战略的实施带来了负面影响。我国水体污染主要来自两方面,一是工业发展超标排放工业废水,二是城市化中由于城市污水排放和集