短程硝化最优曝气时间控制与硝化种群调控-彭永臻
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2020-02-15 13:49:06
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书第45卷第2期2013年2月哈尔滨工业大学学报JOURNALOFHARBININSTITUTEOFTECHNOLOGYVol.45No.2Feb.2013短程硝化最优曝气时间控制与硝化种群调控彭永臻1,2,杨岸明1,李凌云3,吴蕾1(1.北京工业大学北京市水质科学与水环境恢复工程重点试验室,100124北京;2.哈尔滨工业大学城市水资源与水环境国家重点实验室,150090哈尔滨;3.机科发展科技股份有限公司环境与生态工程事业部,100044北京)摘要:为确定实现短程硝化的最优曝气时间,采用3个平行的序批式间歇反应器(SBR)处理生活污水,在pH为7.9~8.0时,“氨谷”出现前t/2、t/4、t/8(t为曝气时间)停止曝气,实现短程硝化.运行145d后,系统亚硝态氮积累率分别提高到50%、65%、90%.荧光原位杂交技术(FISH)定量分析表明,反应器中氨氧化菌(AOB)的比例都有不同程度提高,3#SBR最为显著,AOB、亚硝酸盐氧化菌(NOB)占全菌的比例分别为3.89%、0.27%,AOB为硝化菌群中的优势菌.最优曝气时间控制协同游离氨(FA)抑制作用可能是快速实现和维持短程硝化的主要因素.关键词:最优曝气时间;硝化种群调控;亚硝态氮积累率;短程硝化反硝化;序批式间歇反应器中图分类号:X703.1文献标志码:A文章编号:0367-6234(2013)02-0101-05OptimalcontrolofaerationdurationandnitrifyingpopulationregulationforpartialnitrificationPENGYongzhen1,2,YANGAnming1,LILingyun3,WULei1(1.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentalRecoveryEngineering,BeijingUniversityofTechnology,100124Beijing,China;2.StateKeyLaboratoryofUrbanWaterResourceandEnvironment,HarbinInstituteofTechnology,150090Harbin,China;3.EnvironmentalandEcologicalDepartment,MachineryTechnologyDevelopmentCo.Ltd,100044Beijing,China)Abstract:Domesticwastewaterwastreatedbyusingthreeparallelsequencingbatchreactors(SBR)atthepHof7.9-8.0tooptimizeaerationdurationofpartialnitrification.Thepartialnitrificationwasachievedandmaintainedbycontrollingtheaerationtimeoft/2,t/4,t/8respectively(twasaerationtime)beforeappearanceofammoniavalley.Nitriteaccumulationratioswereimprovedby50%,65%,90%respectivelyinthethreereactorswhichwereoperatedin145days.FISHquantitativeanalysisshowedthatthepercentageofammoniaoxidizingbacteria(AOB)inthereactorsincreaseddifferently.AOBandnitriteoxidizingbacteria(NOB)was3.89%and0.27%ofthetotalbacteriarespectivelyinNo.3reactor,whichshowedthatAOBisthedominantbacteriainnitrifyingbacteria.ItisconcludedthatsynergisticeffectbetweentheoptimalcontrolofaerationdurationandtheinhibitionofFAwouldbethekeyfactorstorapidstart-upandmaintainthestablenitrification.Keywords:optimumaerationduration;nitrifyingcommunityregulation;nitriteaccumulationratio;partial
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