COD对生物除磷颗粒污泥稳定性影响研究_刘小英
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2020-02-24 10:14:56
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第5卷第4期环境工程学报Vol.5,No.42011年4月ChineseJournalofEnvironmentalEngineeringApr.2011COD对生物除磷颗粒污泥稳定性影响研究刘小英1姜应和1*郭超2田晓杰3李祥4(1.武汉理工大学土木工程与建筑学院,武汉430070;2.西安建筑科技大学环境与市政工程学院,西安710055;3.中冶南方工程技术有限公司,武汉430223;4.西安建筑科技大学建筑设计研究院,西安710055)摘要颗粒污泥稳定性是影响其应用的主要因素之一。以SBR中成熟的生物除磷颗粒污泥为研究对象,探讨进水COD浓度对系统稳定性的影响。结果表明,当进水COD浓度由300mg/L逐渐升高到500mg/L时,磷去除率由93%降低到88%;当进水COD浓度在400mg/L以下时,污泥的最大比释磷速率和比吸磷速率分别为45.2mg/(gMLSS·h)和33.5mg/(gMLSS·h),污泥中P的含量为5.6%~7%,出水SS在50mg/L以下;当进水COD浓度提高到550mg/L时,磷去除率仅为63%,此时反应器出水SS在150mg/L以上,颗粒污泥周围丝状菌过度生长,而且菌丝粗壮,颗粒污泥解体。因此,生物除磷颗粒系统具有一定的耐COD冲击能力,但在高COD负荷下会导致颗粒污泥系统崩溃。关键词COD浓度生物除磷颗粒污泥稳定性中图分类号X703文献标识码A文章编号1673-9108(2011)04-0807-05InfluenceofCODonphosphorusremovalgranularsludgestabilityLiuXiaoying1JiangYinghe1GuoChao2TianXiaojie3LiXiang4(1.SchoolofCivilEngineering&Architecture,WuhanUniversityofTechnology,Wuhan430073,China;2.SchoolofEnvironmental&MunicipalEngineering,Xi’anUniversityofArchitecture&Technology,Xi’an710055,China;3.WISDRIEngineering&ResearchIncorporationLimited,Wuhan430223,China;4.ArchitectureDesign&ResearchInstitute,Xi’anUniversityofArchitecture&Technology,Xi’an710055,China)AbstractThestabilitywasoneofimportantfactorsforapplicationofgranularsludge.WiththeinfluentCODconcentrationchangedthestabilityofthebiologicalphosphorousremovalgranularsludgewasstudiedinasequencingbatchreactor(SBR).WhentheinfluentCODconcentrationgraduallyincreasedfrom300mg/Lto500mg/L,thephosphorusremovalefficiencydecreasedfrom93%to88%.WhentheinfluentCODconcentra-tionwasbelow400mg/L,themax.specificphosphorusreleaserateandthemax.specificphosphorusuptakeratewere45.2mg/(gMLSS·h)and33.5mg/(gMLSS·h),respectively,andthephosphoruscontentofMLSSwas5.6%~7%,andtheeffluentSSwasbelow50mg/L.WhentheinfluentCODconcentrationwassteppedupto550mg/L,thephosphorusremovalefficiencydecreasedto63%,theeffluentSSwasabove150mg/L,thefilamentousbacteriaovergrew,andthegranularsludgewasdisintegrated.ThebiologicalphosphorousremovalgranularsludgecouldstandsomeimpactsofCODconcentration,andthesystemwouldbreakdownathighCODconcentration
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