异养硝化-好氧反硝化菌协同竞争对脱氮特性的影响
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2020-04-07 21:56:41
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第30卷第5期2017年5月环境科学研究ResearchofEnvironmentalSciencesVo1.30.No.5May,2017黄郑郑,曹刚,陈海升,等.异养硝化一好氧反硝化菌协同竞争对脱氮特性的影响[J].环境科学研究,2017,30(5):765-774.HUANGZhengzheng,CAOGang,CHENHaisheng,eta1.Synergyandcompetitionfornitrogenremovalbyheterotrophicnitrification—aerobicbacteria[J].ResearchofEnvironmentalSciences,2017,30(5):765-774.异养硝化.好氧反硝化茵协同竞争对脱氮特性的影响黄郑郑,曹刚,陈海升,李紫惠,莫测辉1.暨南大学环境学院,广东广州5106302.广东省污染控制与修复材料工程技术中心,广东广州510630摘要:为了探讨在脱氮过程中异养硝化一好氧反硝化菌类之间的协同和竞争作用,以A/O工艺好氧污泥中筛出的三株异养硝化.好氧反硝化菌——xH02、XH03和FX03为研究对象,经16SrDNA基因序列系统发育分析,鉴定XH02为人苍白杆菌(Ochrobactrumsp.),XH03和FX03为假单胞菌(Pseudomonassp.).在此基础上,分别考察了单菌株和复合菌株(XH02+XH03、XH02+FX03、XH03+FX03和XH02+XH03+FX03)在异养硝化和好氧反硝化条件下的脱氮特性.结果表明:菌株XH02和XH03具有高效脱氮特性,在异养硝化过程中,第24小时对NH一N的去除率分别为90.2%和89.5%;在好氧反硝化过程中,二者在第24小时对NO一一N的去除率分别为91.8%和94.0%.复合菌株XH02+XH03无论在异养硝化还是好氧反硝化过程中,均能相互协同,促进生长,进一步提高了脱氮效率,在第24小时对NH一N和NO3一一N的去除率分别达到97.1%和96.7%.在硝化和反硝化过程中,菌株FX03对XH02、XH03均存在着竞争关系,FX03的存在会抑制菌株XH02和XH03的生长,显著降低脱氮效率.研究显示,异养硝化一好氧反硝化菌XH02和XH03之间的协同作用可以强化废水生物处理,提高脱氮效率.关键词:复合菌株;异养硝化一好氧反硝化;脱氮特性;协同竞争;混合培养中图分类号:X703文章编号:10016929(2017)05—0765—10文献标志码:ADOI:10.13198/j.issn.1001—6929.2017.01.79SynergyandCompetitionforNitrogenRemovalbyHeterotrophicNitrification-AerobicDenitrifiCatiOnBacteriaHUANGZhengzheng,CAOGang',CHENHaisheng,LIZihui,MOCehui'1.SchoolofEnvironment,JinanUniversity,Guangzhou510630,China2.GuangdongEngineeringCenterforEnvironmentContaminationControlandRestorativeMaterials,Guangzhou510630,ChinaAbstract:Toinvestigatetheeffectsofsynergyandcompetitionbyheterotrophicnitrification—aerobicdenitrificationbacteriaonnitrogenremoval,theXH02,XH03andFX03wereisolatedfromaerobicsludgeinA/Oprocess.TheywereidentifiedasOchrobactrurnsp.,Pseudomonassp.andPseudomonassp.onthebasisofphylogeneticanalysisof16SrDNAgenesequence,respectively.FurtherheterotrophicnitrificationandaerobicdenitrificationanalysiswererevealedforsingleandcompoundstrainsofXH02+XH03,XH02+FX03.XH03+FX03andXH02+XH03+FX03.TheresultsshowedthatXH02andXH03exhibitedhighlyefficientdenitrificationcapability.Theammoniaremovalefici
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