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1、**市污水处理厂工艺设计摘要本设计是在邓州市拟建一座工程规模为12万m3/d的污水处理厂。通过综合考虑邓州市概况及本工程的规模、进水特性、处理要求、运行费用和维护管理等情况,经技术经济比较分析,确定采用AAO生物脱氮除磷处理工艺。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、初沉池,再进入生物池(即AAO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
2、,二沉池的回流污泥则通道管道、污泥回流泵房再次进入AAO反应池,经过贮泥、消化处理后的污泥,进入污泥浓缩脱水车间,最后外运处理。AAO工艺的生物处理部分由厌氧池、缺氧池和好氧池组成。厌氧池主要功能是释放磷,同时部分有机物进行氨化。缺氧池的主要功能是脱氮。好氧池是多功能的,能够去除BOD、硝化和吸收磷。本次设计所选择的AAO工艺,具有良好的脱氮除磷功能。此外该工艺还具有高效、节能的特点,且耐冲击负荷较高,出水水质好。因此,更具有广泛的适应性,完全适合本设计的实际要求。关键词:AAO工艺,脱氮除磷,
3、总体布置77**市污水处理厂工艺设计AbstractThiscapitalisdesignedtosewagetreatmentfactoryintendingtobuildoneprojectscalefor120000m3/dinDengZhou.Conditionsuchashandlingcallfor,operationcostanddefendingadministrationbyscale,water-enteringcharacteristicproperty,consideri
4、ngDengZhoucitygeneralsituationandthisprojectsynthetically,livingthingstakesoffanitrogenbythattechnicaleconomy,analyzingcomparatively,adoptAAOforsurehandlinghandicraftexceptthephosphorus.TheselectedAAOprocess,hasagoodNitrogenandPhosphorusRemoval.Thiss
5、ewagetreatmentplantforthesewagetreatmentprocessis:sewagefromthecoarsegridtoenhancethepumpingstation,thenfromthepumptothefinegrid,Andthentothecyclonegritchamber,thenenteringthebiologicalpool(AAOreactor),thenfromthepoolintothesecondarysedimentationtank
6、,afterexposuretowaterdisinfectionandthendischargedintothenaturalwater;Sludgetreatmentprocessis:vortexgritchambersludgeintothesludgedewateringplantdirectly,secondarysettlingtanksludgearealsobroughtintotheworkshop,secondarysedimentationtankproducedretu
7、rnedsludgechannelpipes,returnedsludgefromthepumptore-enterAAOreactor,aftertreatmentplantsludgedewateringsludge,mudintothestoragepool,thelastisoutwardprocessing.TheAnaerobic-Anoxic-Oxicprocessofbiologicaltreatmentinpartbytheanaerobictankanoxicandaerob
8、ictank.Themainfunctionoftheanaerobicpondisthereleaseofphosphoruspartoftheorganicmatterammonicition,themainfunctionofanoxicisDentrification.Aerobictankisaversatile,abletoremoveBOD,nitrificationandphosphorusabsorption.Theadvantageofthiscomprehensivecra