SBR短程硝化的启动及稳定运行特性_杨辉
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2020-01-25 14:52:38
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2010年11月第26卷第6期沈阳建筑大学学报(自然科学版)JournalofShenyangJianzhuUniversity(NaturalScience)Nov.2010Vol.26,No.6收稿日期:2010-06-20基金项目:住房和城乡建设部攻关项目(05-K2-9)作者简介:杨辉(1973—),女,副教授,博士研究生,主要从事水污染控制理论与技术研究.文章编号:1671-2021(2010)06-1199-06SBR短程硝化的启动及稳定运行特性杨辉1,2,崔慧慧1,张宇1,徐月1(1.沈阳建筑大学市政与环境工程学院,辽宁沈阳110168;2.东北大学资源与土木工程学院,辽宁沈阳100004)摘要:目的实现模拟生活污水短程硝化系统的启动并使系统稳定运行.方法在温度为(28±1)℃,pH为8.0左右的情况下,采用低氧连续曝气的运行方式在SBR反应器中进行启动,起初控制曝气量为80~90L/h,每个周期曝气时间为330min,并根据反应情况对曝气量随时进行调整.结果经过39个周期的运行,曝气结束后NO-2-N积累率高达94.13%,NH+4-N去除率可达92.7%,成功地实现了系统的启动,随后对曝气量不断进行调整,在第81周期后进行一次排泥,并不断增加NH+4-N质量浓度,在第131周期后系统便稳定运行,具有良好的NO-2-N积累能力.结论试验结果表明适当调整曝气量,可在短时间内启动短程硝化,但只通过调整曝气量并不能保证系统的稳定运行,然而通过排泥和逐渐增加NH+4-N浓度的方式在定时曝气的条件下能使系统稳定.关键词:低曝气量;短程硝化;SBR法;模拟生活污水中图分类号:X703文献标志码:AStart-UpandSteadyOperationofShort-CutNitrificationinaSequencingBatchReactorYANGHui1,2,CUIHuihui1,ZHANGYu1,XUYue1(1.SchoolofMunicipalandEnvironmentalEngineering,ShenyangJianzhuUniversity,Shenyang,China,110168;2.SchoolofRe-sourcesandCivilEngineering,NortheasternUniversity,Shenyang,China,100004)Abstract:Thepurposeofthispaperistoobtainastart-upofshort-cutnitrificationsystemsfedwithsimulateddomesticwastewateratlowaerationrates,andtokeepthesystemoperationstable.Undertheconditionsofatemperatureof(28±1)℃andapHvalueof8.0,theinitialaerationrateandaerationtimewerecontrolledtobe80~90L/hand330minrespectively,andtheaerationratewasadjustedappropriatelyinthewholeprocessofreactions.Thestart-upofoursystemcanbeachievedafter39cycles,andtheNO-2-NaccumulationandtheNH+4-Nremovalefficiencyreached94.13%and92.7%respectively.Thereafter,wedischargedthesludgeafter81cyclesandgraduallyincreasedtheNH+4-Nconcentration.After131cycles,theshort-cutnitrificationsystembecamestableandexhibitedahighcapabilityofNO-2-Naccumulation.Theresultsindicatethatthestart-upcanbeachievedrapidlybyonlyadjustingtheaerationrate,butsacrificingthestabilityofsystem.Astablesystemcanbeobtainedbycontrollingaerationtime,dischargingsludge,andincreasingNH+4-Ncon-centration.Keywords:lowaerationrates;short-cutnitrification;sequencingb
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