分离自养殖水体的异养硝化-好氧反硝化菌及其脱氮作用研究
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2020-04-07 21:50:05
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现代食品科技ModernFoodScienceandTechnology2019,Vol.35,No.736分离自养殖水体的异养硝化-好氧反硝化菌及其脱氮作用研究王永红1,2,李安章1,3,张明霞1,陈猛2,3,朱红惠1(1.广东省微生物研究所,省部共建华南应用微生物国家重点实验室,广东省菌种保藏与应用重点实验室,广东省微生物菌种保藏中心,广东广州510070)(2.广东博沃特生物科技有限公司,广东肇庆526238)(3.广州王道生物科技有限公司,广东广州510663)摘要:本研究从8份养殖水体样品中富集、分离、纯化、鉴定能脱除亚硝态氮、硝态氮和氨氮的菌株资源,获得8株亚硝态氮脱除菌、8株硝态氮脱除菌和11株氨氮脱除菌,分布在Pseudomonas、Paracoccus、Zobellella、Achromobacter、Bosea、Paenarthrobacter、Corynebacterium、Bacillus、Delftia和Gordonia等属。对这27株菌进行脱氮特性分析,筛得2株异养硝化-好氧反硝化菌,分别鉴定为Pseudomonasstutzerij-1和Zobellelladenitrificans2G-5。这2株菌脱氮性能优越,在3种氮素培养基中培养18h后,对亚硝态氮、硝态氮和氨氮的脱除率在99.53%~99.89%之间。将之用于未灭菌的养殖水脱氮,菌株j-1表现出一定的定殖和增殖能力,发挥出良好的脱氮效果;但菌株2G-5增殖能力较弱,脱氮效果不明显。本研究发掘了一批脱氮菌株资源,获得了2株具有重要应用潜力的异养硝化-好氧反硝化菌,为细菌氮循环代谢机制研究和脱氮技术研发积累了物质基础。关键词:反硝化;硝化;脱氮;同步硝化反硝化;养殖水体;氨氧化文章篇号:1673-9078(2019)07-36-46DOI:10.13982/j.mfst.1673-9078.2019.7.007IsolationofHeterotrophicNitrificationandAerobicDenitrificationBacteriafromAquacultureWaterandStudyofTheirDenitrificationEfficiencyWANGYong-hong1,2,LIAn-zhang1,3,ZHANGMing-xia1,CHENMeng2,3,ZHUHong-hui1(1.GuangdongMicrobialCultureCollectionCenter(GDMCC),GuangdongProvincialKeyLaboratoryofMicrobialCultureCollectionandApplication,StateKeyLaboratoryofAppliedMicrobiologySouthernChina,GuangdongInstituteofMicrobiology,Guangzhou510070,China)(2.GuangdongBewoteBiotechnologyCo.Ltd.,Zhaoqing526238,China)(3.GuangzhouWangdaoBiotechnologyCo.Ltd.,Guangzhou510663,China)Abstract:Thepresentstudycollected8samplesfromaquaculturepondsforperformingenrichment,isolation,purificationandidentificationofbacteriastrainscapableofremovingNO2--N,NO3--NandNH4+-N.Weobtained8,8and11bacteriastrainswhichcouldremoveNO2--N,NO3--NandNH4+-N,respectively.ThesebacteriawereclassifiedintothegeneraPseudomonas,Paracoccus,Zobellella,Achromobacter,Bosea,Paenarthrobacter,Corynebacterium,Bacillus,DelftiaandGordonia.Afteranalysisofdenitrificationcharacteristics,twoheterotrophicnitrificationandaerobicdenitrificationbacteriastrainswithexcellentdenitrificationeffectswereobtainedandidentifiedasPseudomonasstutzerij-1andZobellell
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