不同曝气方式SBR短程硝化试验研究-苏东霞
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2020-02-21 10:23:43
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第45卷第6期中南大学学报(自然科学版)Vol.45No.62014年6月JournalofCentralSouthUniversity(ScienceandTechnology)June2014不同曝气方式SBR短程硝化试验研究苏东霞1,李冬1,张肖静2,张功良1,周元正1,范丹1,张杰1,2(1.北京工业大学水质科学与水环境恢复工程北京市重点实验室,北京,100124;2.哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨,150090)摘要:在常温条件下(20~25℃),分别采用间歇曝气SBR(1号)和连续曝气SBR(2号),研究4个不同初始DO质量浓度(0.5~1.0,1.5~2.0,2.5~3.0和3.5~4.0mg/L)下生活污水的亚硝化。研究结果表明:2个反应器的COD去除效果相差不大;运行50d后,1号反应器的氨氮去除容积负荷比2号的大,且4个DO质量浓度下亚硝化率均在90%以上,而当2号反应器的DO质量浓度为3.5~4.0mg/L时,亚硝化率由90%逐渐下降至72.9%,后采用间歇曝气经15d成功使其亚硝化率恢复至90%。间歇曝气反应器内污泥中亚硝化菌的相对数量比连续曝气反应器的多,硝化菌则比连续曝气反应器的小。间歇曝气在节省能耗的同时可以稳定实现较高的氨氧化速率和亚硝化率,是常温生活污水SBR短程硝化长期高效稳定运行的有效手段。关键词:常温;生活污水;间歇曝气;连续曝气;短程硝化;SBR中图分类号:X703.1文献标志码:A文章编号:1672−7207(2014)06−2120−10StudyonpartialnitrificationwithdifferentaerationmodesinsequencingbatchreactorSUDongxia1,LIDong1,ZHANGXiaojing2,ZHANGGongliang1,ZHOUYuanzheng1,FANDan1,ZHANGJie1,2(1.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124,China;2.StateKeyLaboratoryofUrbanWaterResourceandEnvironment,HarbinInstituteofTechnology,Harbin150090,China)Abstract:TheshortcutnitrificationfordifferentinitialDOmassconcentrations(0.5−1.0,1.5−2.0,2.5−3.0and3.5−4.0mg/L)wasstudiedwiththeintermittentaerationSBR(No.1)andthecontinuousaerationSBR(No.2)treatingdomesticwastewateratnormaltemperatureof20−25℃.TheresultsshowthattherearenofundamentalrealdistinctionsinCODremovalefficiencybetweenNo.1andNo.2.Also,whenthetworeactorsrunfor50d,theammonianitrogenremovalvolumeloadingofNo.1ismorethanNo.2.Thenitrosationrateof1#isstillabove90%duringfourDOperiods,whilethenitrosationrateofNo.2decreasefrom90%to72.9%graduallyaftertheDOmassconcentrationisincreasedto3.5−4.0mg/Landthenittakes15dtomakethenitrosationrateofNo.2backto90%bytheuseofintermittentaeration.Therelativequantityofammoniaoxidizingbacteriaismoreandtherelativequantityofnitriteoxidizingbacteriaislessintheintermittentaerationreactor.Therefore,theintermittentaerationwhichhashigherammoniaoxidationrate,thenitrosationrateandenergysaving,isaneffect
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