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时间:2020-04-19
《高氨氮、偏碱性条件下好氧颗粒污泥的培养及其特征.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第28卷第19期中国给水排水V0l_28No.192012年10月CHINAWATER&WASTEWATER0ct.2012高氨氮、偏碱性条件下好氧颗粒污泥的培养及其特征刘宏波,刘和,符波,.李雅婕(1.江南大学环境与土木工程学院环境生物技术研究室,江苏无锡214122:2.陕西理工学院化学与环境学院,陕西汉中723001)摘要:在高氨氮、偏碱性条件下培养好氧颗粒污泥,并对其特征进行了研究。结果表明,在高氮氮、偏碱性条件下,好氧颗粒能够在一周内出现,一个月内形成稳定的颗粒化污泥。偏碱性条件有效地抑制了丝状菌的生长,形成的颗粒污泥直
2、径小、密实;且在颗粒形成过程中污泥流失少,SVI值波动不大。在好氧颗粒污泥稳定阶段,60%的颗粒污泥粒径为0.3一O.6mm,绝大部分的颗粒污泥含水率和沉降速度分别在94%和25m/h左右。同时,在高氨氮生长压条件下培养出的好氧颗粒污泥具有较强的硝化和反硝化能力,其比硝化速率、比反硝化速率分别为0.41kgNH4+一N/(kgMLSS·d)和0.435kgNO~-一N/(kgMLSS·d)。关键词:高氮氮;偏碱性;好氧颗粒污泥;比硝化速率;粒径中图分类号:X703文献标识码:A文章编号:1000—4602(2012)19—0024
3、—04CultivationandCharacteristicsofAerobicGranularSludgeunderHigh-concentrationAmmoniaNitrogenandPartialAlkalinityConditionsLIUHong—bo,LIUHe,FUB0,LIYa-jie(1.SchoolofEnvironmentalandCivilEngineering,JiangnanUniversity,Wuxi214122,China;2.SchoolofChemistryandEnvironmental
4、Science,ShaanxiUniversityofTechnology,Hanzhong723001,China)Abstract:Aerobicgranularsludgewascultivatedundertheconditionsofhigh—concentrationam—monianitrogenandpartialalkalinity,anditscharacteristicswereinvestigated.Theresultsindicatedthataerobicgranularsludgecouldappe
5、arwithinoneweekandreachstabilitywithinonemonthunderthehigh—concentrationammonianitrogenandpartialalkalinityconditions.Smalldiameteranddensestructurewereobservedintheaerobicgranularsludge,likelyresultingfromtheeffectiverestraintoffilamentousbacteriagrowthunderalkalinec
6、ondition.Inthegranulationprocess,thechangeofMLSSwassmall,andSV1wasrelativelystable.Inthestableoperationprocess,thediameterofaerobicgranularsludgewith60%dryweightwasintherangeof0.3to0.6mm.Thewatercontentandsettlingvelocityofmostgran—uleswereabout94%and25m/hrespectively
7、.Moreover,theaerobicgranularsludgecultivatedunderhighlyselectivepressureofhigh-concentrationammonianitrogenpresentedgoodnitrificationanddenitrifi—cationability,withthespecificnitrificationrateof0.41kgNH4一N/(kgMLSS·d)andthespecificdenitrificationrateof0.435kgNO~-一N/(kg
8、MLSS·d).Keywords:high-concentrationammonianitrogen;partialalkalinity;aerobicgranularsludge;基金项目:江南大学自主科研计划项目(JUSRP11206)·24·
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