包埋氨氧化细菌处理合成氨工业废水-李辉军
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2020-02-19 09:31:16
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第8卷第9期环境工程学报Vol.8,No.92014年9月ChineseJournalofEnvironmentalEngineeringSep.2014包埋氨氧化细菌处理合成氨工业废水李辉军1吴亚杰1戴昕2安立超1*(1.南京理工大学环境与生物工程学院,南京210094;2.南京科盛环保科技有限公司,南京211500)摘要以聚乙烯醇与海藻酸钠为载体,包埋固定氨氧化细菌(AOB),研究温度、DO、初始游离氨(FA)、有机物等影响因素对其短程硝化稳定性的影响。结果表明,25~30℃时载体中氨氧化细菌占优势;DO宜控制在4.0~5.5mg/L之间,既能满足细菌生长所需,又不至过度曝气,造成载体间的摩擦增大,减少其使用寿命;载体耐氨氮负荷能力强,同时可以抵御有机物对氨氧化细菌的伤害;当初始FA>6.5mg/L时,氨氧化细菌的活性将受到抑制;富集氨氧化细菌的污泥包埋后氨氮去除率降低了7.5%;包埋载体在确保短程硝化作用的同时,在内部形成的缺氧区可实现反硝化脱氮,提高了系统氨氮的处理能力。关键词包埋固定化短程硝化氨氧化细菌亚硝酸盐积累率反硝化中图分类号X703文献标识码A文章编号1673-9108(2014)09-3791-06AmmoniaindustrialwastewatertreatmentusingimmobilizedammoniumoxidizingbacteriaLiHuijun1WuYajie1DaiXin2AnLichao1(1.SchoolofEnvironmentalandBiologicalEngineering,NanjingUniversityofScienceandTechnology,Nanjing210094,China;2.NanjingKeshengEnvironmentalProtectionTechnologyCo.Ltd.,Nanjing211500,China)AbstractInthisstudy,theammoniaoxidizingbacteria(AOB)wereimmobilizedbypolyvinylalcoholandsodiumalginate.Theeffectsoftemperature,DO,freeammonia(FA),organicmatteronthestabilityofpartialni-trificationwereinvestigated.Theresultsshowedthatammoniaoxidizingbacteriapredominatedinthecarriersat25~30℃;DOshouldbecontrolledat4.0~5.5mg/L,itnotonlymettheneedsofbacterialgrowth,butalsoa-voidedexcessiveaeration.Otherwiseitwouldincreasethefrictionbetweenthecarriers,resultinginthereductionoftheirsusefullife.Thecarrierswerestronglyresistanttonitrogenloadingrate,andalsowithstoodthedamageoforganicmattertoammoniaoxidizingbacteria.TheactivityofAOBwasinhibitedwheninitialFAconcentrationwasover6.5mg/L.Afterenrichedammoniaoxidizingbacteriasludgehadbeenembedded,theammoniaremovaleffi-ciencydecreasedabout7.5%.Inaddition,anoxiczonewasformedinsidethecarrierswhileensuringpartialnitri-ficationprocess.Denitrificationcouldbeachievedintheanoxiczone,improvingammoniaremovalefficiencyofthesystem.Keywordsimmobilization;partialnitrification;ammoniumoxidizingbacteria;nitriteaccumulationrate;denitrification基金项目:江苏省环保科研课题项目(2012046)收稿日期:2013-08-09;修订日期:2013-12-09作者简介:李辉军(1988~),男,硕士研究生,主要从事水污染控制工程研究工作。E-mail:a158431
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