CANNED工艺细菌种群结构变化的FISH研究_张伟华
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2020-01-25 14:52:30
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第23卷第9期2010年9月环境科学研究ResearchofEnvironmentalSciencesVol.23,No.9Sep.,2010CANNED工艺细菌种群结构变化的FISH研究张伟华1,2,王海燕1,曾清如2,周岳溪1*,葛建团31.中国环境科学研究院水污染控制技术研究中心,北京1000122.湖南农业大学资源环境学院,湖南长沙4101283.甘肃省环境科学设计研究院,甘肃兰州730030摘要:采用电镜观察和荧光原位杂交技术(FISH),对亚硝化/电化学生物反硝化全自养脱氮(CANNED)工艺在不同游离氨(FA)质量浓度下反应器内细菌形态和种群结构进行了研究.结果表明:在亚硝化段,ρ(FA)为0.5mg/L时,氨氧化菌(AOB)和亚硝酸盐氧化菌(NOB)分别占总菌数的0.9%和2.8%;ρ(FA)为12.4~48.6mg/L时,AOB和NOB分别占33.6%~47.4%和1.0%~2.9%,能够实现短程硝化.在电化学生物反硝化段,当ρ(FA)为0.5~12.4mg/L时,脱氮硫杆菌、厌氧氨氧化菌和真细菌分别占总菌数的7.2%~15.3%,7.2%~10.3%和9.1%~14.3%;当ρ(FA)增加到48.6mg/L时,上述3种细菌所占比例分别增加到总菌数的34.5%,44.2%和60.8%,表明随着ρ(FA)的增加,提高ρ(FA)有利于上述3种菌的生长,与SEM结果一致.关键词:亚硝化;电化学生物反硝化;游离氨;FISH;电镜中图分类号:X703.1文献标志码:A文章编号:1001-6929(2010)09-1185-07StudyofBacterialCommunityChangesinCANNEDProcessbyFISHMethodZHANGWei-hua1,2,WANGHai-yan1,ZENGQing-ru2,ZHOUYue-xi1,GEJian-tuan31.ResearchCenterfortheWaterPollutionControlTechnology,ChineseResearchAcademyofEnvironmentalSciences,Beijing100012,China2.CollegeofResourcesandEnvironment,HunanAgriculturalUniversity,Changsha410128,China3.EnvironmentalSciencesDesignResearchAcademyofGansuProvince,Lanzhou700030,ChinaAbstract:Scanningelectronmicroscope(SEM)andfluorescenceinsituhybridization(FISH)wereusedtostudythebacterialmorphologyandcommunityofthecompleteautotrophicnitrite-nitrificationandelectrochemicalbio-denitrificationcombinedprocess(CANNED),whichwasoperatedforammoniumwastewatertreatmentatdifferentinfluentconcentrationsoffreeammonia(FA).WhenthemassconcentrationofFAwas0.5mg/Linthenitrite-nitrificationpart,theAOBandNOBwere0.9%and2.8%ofthebacteria,respectively.Itcouldachieveshort-termnitrificationwhenthemassconcentrationofFAwas12.4-48.6mg/L.AOBandNOBwere33.6%-47.4%and1.0%-2.9%ofbacteriarespectivelyundertheabovementionedconditions.Intheelectrochemicalbio-denitrificationpart,thethiobacillusdenitrificans,anammoxbacteriaandeubacteriawere7.2%-15.3%,7.2%-10.3%and9.1%-14.3%oftotalbacteriarespectivelywhentheinfluentFAwas0.5-12.4mg/L.WhenthemassconcentrationofFAincreasedto48.6mg/L,theabovethreekindsofbacteriawere34.5%,44.
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