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时间:2017-12-10
《混合液回流比对aao工艺反硝化除磷的影响》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、维普资讯http://www.cqvip.com第58卷第lO期化工学报Vo1.58NO.102007年l0月JournalofChemicalIndustryandEngineeringCletober2007混合液回流比对A/A/O工艺反硝化除磷的影响徐伟锋。,顾国维,张芳。(上海电力学院环境工程系,上海200090;同济大学污染控制与资源化研究国家重点实验室,上海200092)摘要:以生活污水培养驯化污泥的小试规模A/A/O工艺为研究对象,进行了混合液回流比为100、200和300时对反硝化除磷的影响研
2、究,并利用厌氧/缺氧批式试验方法对污泥特性进行单独考察。结果表明,随着混合液回流比的增大,缺氧除磷在系统除磷所起的作用、反硝化聚磷菌缺氧利用单位聚羟基链烷酸(PHAs)的吸磷量和反硝化数量出现先升高后下降,厌氧合成单位PHAs的释磷量和好氧利用单位PHAs的吸磷量并没有受到影响,以200时反硝化除磷和系统脱氮除磷效果为最好;过高或过低NOs—N浓度均会影响反硝化聚磷菌的缺氧吸磷速率和PHAs降解速率,但并没有影响其本身所固有的特性。关键词:生物脱氮除磷;反硝化除磷;混合液回流比;生活污水中图分类号:X703.
3、1文献标识码:A文章编号:0438~1157(2007)10—26l9—05EffectofinternalreturnratioondenitrifyingphosphorusremovalinA/A/OprocessXUWeifeng,GUGuowei,ZHANGFang~(DepartrnentofEnvironmentalEngineering,ShanghaiUniversityofElectricPower,Shanghai200090,China;LStateKeyLaboratoryo}Pol
4、lutionControlandResourceReuse,TongjiUniversity,Shanghai200092,China)Abstract:Basedonalaboratory—scaleanaerobic—anoxicoxic(A/A/O)processacclimatedwithmunicipalwastewaterascarbonsource,theeffectofinternalreturnratioondenitrifyingphosphorusremovalinthesystemwa
5、sinvestigatedatinternalreturnratioof100,200and300,andanaerobic/anoxicbatchexperimentswereperformedtostudysludgecharacteristics.TheresultsindicatedthatthecontributionofanoxicPremovaltototalPremovalbecamelarger,denitrifyingphosphorus—accumulatingorganisms’(DN
6、PAOs)anoxicPuptakeanddenitrificationcapacityperpolyhydroxyalkanoates(PHAs)utilizedincreasedfirstly。andthendecreased,whileanaerobicPreleasecapacityperPHAsaccumulatedandaerobicPuptakecapacityperPHAsutilizedwererarelyinfluencedbyirmreasinginternalreturnratio.W
7、heninternalreturnratiowassetat200,denitrifyingphosphorusremovalandbiologicalnutrientremovalefficiencywerethehighest.TheresultsinthebatchexperimentsalsoshowedthathigherorlowernitrateconcentrationsatthebeginningofanoxicstagecouldinfluenceDNPAOs’anoxicPuptakea
8、ndPHAsutilizationrates.buttheirintrinsiccharacteristicswerealmostneveraffected.Keywords:biologicalnutrientremoval;denitrifyingphosphorusremoval;internalreturnratio;municipalwastewater2006—1103收到初稿,2006
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