晚期垃圾渗滤液厌氧氨氧化脱氮及其抑制动力学
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2020-04-09 14:21:21
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中国环境科学2016,36(5):1409-1416ChinaEnvironmenta】Science晚期垃圾渗滤液厌氧氨氧化脱氮及其抑制动力学李芸,李军,蔡辉,陈刚,侯爱月,胡啸,卞伟,国瑞峰,刘一夫(1北京工业大学建筑工程学院,北京市水质科学与水环境恢复工程重点实验室,北京100124;2.中国城市建设研究院有限公司,北京100012)摘要:采用晚期垃圾渗滤液对UASB反应器中无机环境培养条件下厌氧氨氧化菌进行驯化,探讨基质浓度和水力停留时间对系统运行性能的影响.通过批式试验分别对基质和垃圾渗滤液抑制厌氧氨氧化动力学进行测定并建立相应的动力学模型.结果表明,经过75d的运行,系统逐渐适应垃圾渗滤液并实现高效脱氮.基质的去除量随进水基质浓度的升高呈先升高后降低的变化趋势.随着HRT的延长,进水基质及渗滤液浓度逐渐升高,系统脱氮效果降低.厌氧氨氧化基质抑制的阈值是NH4—N浓度为489.03mg/L和NO2-N浓度为192.36mg/L.当以铵盐为抑制剂时,Vmax(NH4+-N)为O.1893mg/(mg·d),半饱和常数为39.39mg/L,抑制动力学常数为3482.27mg/L.当以亚硝酸盐为抑制剂时,fNOf-^为0.246mg/(mg·d),半饱和常数为43.19mg/L,抑制动力学常数为701.15mg/L.厌氧氨氧化受垃圾渗滤液影响尤为显著,垃圾渗滤液条件下厌氧氨氧化活性被完全抑制的浓度为1450.69mg/L(以COD计).关键词:晚期垃圾渗滤液;厌氧氨氧化;脱氮:抑制动力学中图分类号:X703.5文献标识码:A文章编号:1000—6923(2016)05—1409—08NitrogenremovalandinhibitionkineticsofANAMMoXreactorfedwiththematureland伽leachate.LIYun.LIJun.CAIHui,C}玎巳NGang2,HOUAi-yue,HUXiao2,BIANWei,GU0Rui—feng~,LIU·(1.TheCollegeofArchitectureandc沁ilEngineering,BeijingUniversityofTechnology,Beijing1000124,China;2.ChinaUrbanConstructionDesignandResearchInstituteCo.,Ltd.,Beijing100012,China).ChinaEnvironmentalScience,2016,36(5):1409-1416Abstract:Thematurelandfill1eachatewasadoptedtocultivatedanaerobicammoniaoxidationbacteriaintheUASBreactorwhichfedwithinorganicwastewate~therunningperformanceofthesystemwasexploredindiferentsubstrateconcentrationandhydraulicretentiontime,theactivityinhibitionofanaerobicammoniaoxidationbysubstrateandlandfillleachateandtheinhibitionkineticswereanalyzed.Thesystemadaptedtothelandfillleachategraduallyandimplementefficientdenitrificationwhenthesystemrun75d.Theremovalamountofsubstratewasincreasedatfirstandthendecreasedwiththeincreasementofthesubstrateconcentration.AstheextensionofHRT,theconcentrationsofsubstrateandlandfilIleachateWasincreased.thee疏ctofdenitrificationwasdeclineinsystem.ThethresholdsofsubstrateinhibitionwerethatNH4一Nconcentrationwas489.03mg/LandNO2--Nconcentrationof192.36mg/L.whenNH4~Nwasinhibitor,Zm+-N)Was0.1893mg/(mg’d),thehalf-saturationconstantwas39.39mg/L,theinhibitingkineticconstantwas3482.2
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