新型亚硝化工艺开发研究_杜兵

新型亚硝化工艺开发研究_杜兵给水排水Vol.32No.9200617新型亚硝化工艺开发研究杜兵孙艳玲刘寅司亚安田刚(北京市环境保护科学研究院,北京100037)摘要采用长污泥龄、低氧或微氧工艺控制亚硝化反应,成功地开发出了一种全新的亚硝化工艺,连续运转245d。试验结果表明,新型亚硝化工艺氨氮转化率平均为68.1%,亚硝酸盐氮生成率为63.7%,硝酸盐氮生成率平均为1.2%,氨氮几乎全部转化为亚硝酸盐氮,未发生硝酸盐积累。出水中氨氮负荷为0.238kgN/(m3d),亚硝酸盐氮负荷为0.526kgN/(m3d),污泥龄为198d,污泥比增长率为0.0051d-1,污泥产率为0.0375gVSS/gNH3-N。长污泥龄、低溶解氧、游离氨、亚硝酸抑制等的共同作用,是实现稳定亚硝化的关键。关键词污泥龄微氧亚硝化氨氧化DevelopmentofnewtypenitrosationprocessDuBing,SunYan-ling,LiuYin,SiYa-an,TianGang(BeijingEnvironmentalProtectionResearchInstitute,Beijing100037,China)Abstract:Anewnitrosationprocesshasbeendevelopedonthebasisoflongagelowoxygensludgeandmicro-oxygencontrollednitrosationreaction.Theresultsof245daysoperationshowedthatbythiswayalmostalltheammonianitrogenwasconversedintonitratenitrogenwithratesof68.1%,63.7%and1.2%forammonianitrogenconversion,nitritegenerationandnitrategenerationrespectively.Nonitratewasaccumulated.Intheeffluentgainedparameterswere0.238kgN/(m3d),0.526kgN/(m3d),198days,0.0051d-1,0.0375gVSS/gNH3-Nforammonialoading,nitriteloadi