NP对SBR系统中典型微生物菌群的影响

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1、NP对SBR系统中典型微生物菌群的影响摘要壬基酚(Nonlphenol,NP)是一种对生物有机体具有毒害作用的内分泌干扰物(endocrinedisruptingchemicals,EDCs)，主要用于生产表面活性剂壬基酚聚氧乙烯醚(NPmEO)。环境中的壬基酚主要来源于污水处理厂系统中NPmEO的不完全降解后的出水中，并且大量野生动物与实验动物研究证明了壬基酚具有雌激素效应和其他的生物毒性,其对生物体产生的不良作用包括影响内分泌、影响生殖和发育、影响免疫及促癌作用等。壬基酚被认为是有代表性的环境内分泌干扰物,为联合国环境保

2、护署制订的27种优先控制的持久性有毒污染物之一。尽管一些研究对壬基酚在污水处理系统中的迁移转化进行了探讨，但是通过工业废水和生活污水排放进入污水处理系统中的壬基酚是否会对污水处理系统中的微生物种群及污泥活性产生影响尚不明确。因此本论文通过投加不同浓度梯度的壬基酚到经人工配置生活污水驯化的活性污泥中，进行摇瓶实验并进行分析，探索壬基酚对活性污泥可培养微生物的影响关键词：壬基酚；活性污泥；SBR；菌群；酶活性；EffectofNPontypicalmicroorganismsintheSBRsystemAbstractNonyl

3、phenol(NP)isanendocrinedisruptingchemicals(EDCs)withthetoxiceffectforabiologicalorganism,andinactualproduction,nonylphenolmainlyusesfortheproductionofsurfactantnonylphenolethoxylate(NPmEO).Intheenvironment,nonylphenolmainlyproducedfromincompletedegradationofNPmEOin

4、thesewagetreatmentplantNonylphenolsystem.Andaccordingtostudiesonalargenumberofwildandlaboratoryanimals,theresultsshowthatnonylphenolhasestrogeniceffectsandothertoxicity,theadverseeffectsonorganismsofwhichincludeimpactsofendocrine,reproductionanddevelopment,immunean

5、dcancerpromoting.Nonylphenolisconsideredasarepresentativeofenvironmentalendocrinedisruptorsanditwaslistedasoneofthe27prioritypersistenttoxicpollutantsbyEnvironmentalProtectionDepartmentfortheUnitedNations.Althoughthemigrationandtransformationofnonylphenolinsewagetr

6、eatmentsystemshasbeendiscussedinsomestudies,itisstillunclearwhethernonylphenolhaseffectsonmicrobialpopulationandsludgeactivitywhichisdischargedintothesewagetreatmentsystemthroughindustrialwastewateranddomesticsewage.Therefore,inthisthesis,wemadeshakeflaskexperiment

7、sthroughaddingdifferentconcentrationsofnonylphenoltomanuallyconfiguredactivatedsludgeacclimatedbydomesticsewagetoexplorethecultureofactivatedsludgemicroorganismsandtheeffectsoftypicalenzymeactivitysuchasdehydrogenase,phosphataseandureasecausedbynonylphenol.Keywords

8、:nonylphenol;activatedsludge;SBR;bacteria;enzymeactivity;目录1绪论……………………………………………………………………………………………11.1壬基酚的来源………………………………………………………………………………11.2NP的结