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ID:41694954
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时间:2019-08-30
《毕业设计--某城市污水处理厂工艺的设计》由会员上传分享,免费在线阅读,更多相关内容在工程资料-天天文库。
1、本次毕业设计的题目为某城市污水处理厂工艺的设计-八/0工艺。主要任务是完成该污水处理厂的平而布置、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、污水处理厂高程图一张以及主要构筑物设计图六张;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2.5万n?/d。进水水质见下表:污水进水水质单位:mg/L项目碱度BODsNH./-NSSTN0TPo含量12626258.4256303.6本次设计所选择的八/0工艺,具有良好的脫氮除磷功能。该污水厂的污水处理流程为
2、:污水从中格栅到污水提升泵房,再从泵房到细格栅,然后到曝气沉砂池,再进入生物池(即川/0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:曝气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八/0反应池,经过贮泥、加药处理后的污泥,进入污泥浓缩脫水车间,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)屮的一级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项目碱度B0I)5NH7-NSSTN0
3、TPo含量0301530151关键词:M/0工艺;脱氮除磷;污水处理;污泥处理ABSTRACTThesubjectofthisgraduationprojectforamunicipalsewagetreatmentplantprocessdesign——A2/Oprocess.Maintaskistocompletethelayoutofthesewagetreatmentplant,thepreliminarydesignofthevariousstructuresandconstructionplansofdealingwiththedesignofst
4、ructures.Tocompletethepreliminarydesignofadesignmanual,wastewatertreatmentplantwithafloorplan,flowchartofasewagetreatmentplantandthedesignofsixmainstructures;designofthemaindesignofstructures,mainlyisthebiologicalpool,secondarysedimentationtankdesignandcontactdisinfectiontank・Thisse
5、wagetreatmentplantproject,thescaleis25000m3/d.Theinfluentwaterqualityisinthetablebelow.Influentwaterqualityunits:mg/LProject碱度bod5NH/・NSSTN0TP0Content12626258.4256303.6TheselectedA2/Oprocess,hasagoodNitrogenandPhosphorusRemoval.Thissewagetreatmentplantforthesewagetreatmentprocessis:
6、sewagefromthecoarsegridtoenhancethepumpingstation,thenfromthepumptothefinegrid,Andthentothecyclonegritchamber,thenenteringthebiologicalpool(A2/Oreactor)jhenfromthepoolintothesecondarysedimentationtank,afterexposuretowaterdisinfectionandthendischargedintothenaturalwater;Sludgetreatme
7、ntprocessis:vortexgritchambersludgeintothesludgedewateringplantdirectly,secondarysettlingtanksludgearealsobroughtintotheworkshop,secondarysedimentationtankproducedreturnedsludgechannelpipes,returnedsludgefromthepumptore-enterA2/Oreactor,aftertreatmentplantsludgedewateringsludge,mudi
8、ntothestoragepool,t
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