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《不同氮浓度冲击对颗粒污泥脱氮过程中N_2O产生量的影响.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第34卷第1期VoI.34.No.1环境科学2013年1月ENVIRONMENTALSCIENCEJan..2013不同氮浓度冲击对颗粒污泥脱氮过程中N2O产生量的影响韩雪,高大文¨(1.东北林业大学林学院,哈尔滨150040;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:采用好氧一缺氧SBR污水生物处理系统,考察不同进水NH4一N浓度冲击对同步硝化反硝化型颗粒污泥脱氮过中N:0的释放规律和脱氮效果的影响.结果表明,当进水NH4+一N浓度分别从稳定的30mg·L突然提高到40、6O和80mg·L时,氨氮去除率从8O.04%降至61.40%、39.
2、65%和31.02%,但氨氮的去除量变化不大,都在25mg·L左右;另外,NO产生量受进水NH—N冲击较小,在4个不同的进水NH:一N浓度下,典型周期N:0产生量分别为3.019、3.489、3.271和3.490mg·m~,而KN,O释放速率都在0.0045mg·(m·min)左右.同步硝化反硝化型颗粒污泥系统的好氧阶段和缺氧阶段均有NO产生.不同的NH:.N浓度冲击下,同步硝化反硝化型颗粒污泥系统对NH;一N的去除量没有变化,但由于进水NH:一N浓度的提高引起系统脱氮率显著下降.关键词:N,0产生量;氮浓度冲击;颗粒污泥;同步硝化反硝化;SBR中图分类号:X703.1文献标
3、识码:A文章编号:0250—3301(2013)01.0204.05ImpactofDifferentNitrogenConcentrationsOiltheN2OProductionintheDenitrificationProcessofGranularSludgeHANXue.GA0Da.wen·(1.SchoolofForestry,NortheastForestryUniversity,Harbin150040,China;2.StateKeyLaboratoryofUrbanWaterResourceandEnvironment,HarbinInstituteofT
4、echnology,Harbin150090,China)Abstract:Theaerobic·anoxicSBRbiologicalwastewatertreatmentsystemswereusedtoexaminetheimpactofdifferentinfluentNH4+一NconcentrationsonthereleaseofN20andnitrogenremovalinthesimultaneousnitrificationanddenitrificationofgranularsludge.Theresultsshowedthatwhentheinflue
5、ntNH4+一Nconcentrationsuddenlyincreasedfromthestableconcentrationsof30mg·L~to40mg·L~,60mg·L~and80mg·L~,theammoniaremovalratedecreasedfrom80.04%to61.40%,39.65%and31.02%,respectively,however,theammonianitrogenremovalamountunderwentlittlechange,beingabout25mg·L~inallcases;inaddition,therewaslitt
6、leinfluenceofinfluentNH;一NontheN2Oproduction,underthefourdifferentinfluentNH:一Nconcentrations,theN2Oproductioninatypicalcyclewas3.019mg·m一,3.489mg·m一,3.271mg·m一,and3.490mg·m一,respectively,andtheN20emissionrateswereallaround0.0045mg·(m·min)一.N2Owasproducedinboththeaerobicstageandanoxicstageof
7、thegranularsludgesimultaneousnitrificationanddenitrificationsystem.UnderdifferentinfluentNH一Nconcentrations,theamountofNH:一Nremovalbythegranularsludgesimultaneousnitrificationanddenitrificationsystemwasnotchanged,butsignificantdecreaseinnitrogenrem
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