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时间:2017-12-10
《双系统曝气生物滤池处理玉米青贮渗出液_邹海明》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第40卷第4期化学工程Vol.40No.42012年4月CHEMICALENGINEERING(CHINA)Apr.2012双系统曝气生物滤池处理玉米青贮渗出液邹海明,谢越,王艳,李飞跃(安徽科技学院资源与环境系,安徽凤阳2331001)摘要:采用双系统改性沸石曝气生物滤池(BAF)反应器对玉米青贮渗出液进行除碳脱氮处理,研究了对COD、氨氮、总氮(TN)的去除效果及其影响因素气水比(流量比)、水力停留时间、有机负荷和回流比。结果表明:挂膜成熟后,沸石生物膜反应器对COD和氨氮有较好的去除效果;挂膜23d后,COD的去除率可以稳定在70%,氨氮去除率可以稳定在80%以上;当气水比为2∶1,水力
2、停留时间为12h,生物膜活性达到最高,COD去除率达到83.4%;有+机负荷对氨氮去除效果影响较大,有机物质量浓度从160mg/L提高到280mg/L时,NH4-N的去除率由88.6%降为32.7%;回流比对COD、氨氮去除率影响不大,但对TN的去除影响显著,回流比从50%提高到300%,TN去除率从42.3%上升到81.3%。双系统改性沸石BAF反应器明显地改善了玉米青贮渗出液的出水水质。关键词:玉米青贮;改性沸石;生物膜;渗出液;前置反硝化中图分类号:X703.1文献标识码:A文章编号:1005-9954(2012)04-0006-04Treatmentofcornsilageefflue
3、ntbyusingdoublezeolite-biologicalaeratedfiltersystemZOUHai-ming,XIEYue,WANGYan,LIFei-yue(DepartmentofResourceandEnvironment,AnhuiScienceandTechnologyUniversity,Fengyang233100,AnhuiProvince,China)Abstract:Doublemodifiedzeolite-biologicalaeratedfilter(BAF)systemwasselectedtotreatthecornsilage+effluent
4、fortheremovalofCOD,NH4-Nandtotalnitrogen(TN).Removalefficiencyandeffectingfactorssuchastheflowratioofgastowater,hydraulicretentiontime(HRT),organicloadandrefluxratiowereinvestigated.Theresultsshowthatafterthebiofilmmaturationthebio-zeolitesystemBAFhasobviousandstableremovalofCODand++NH4-N;theremoval
5、efficiencyofCODandNH4-Nisover70%and80%respectivelyafter23d.Whentheflowratioofgastowateris2∶1,HRTis12h,thebiofilmhasthebestactivation,andtheremovalefficiencyofCODis+83.4%.Increasingtheorganicload,theremovalofNH4-Nisseverelyinhibited,whichcanbereducedfrom88.6%to32.7%whentheorganicmassconcentrationincr
6、easesfrom160mg/Lto280mg/L.TheremovalofTNisinfluencedsignificantlybyrefluxratio,bywhichtheremovalefficiencyincreasesfrom42.3%to81.3%when+therefluxratioisraisedfrom50%to300%.ButitisnotsignificantforCODandNH4-N.Theeffluentqualityofcornsilageeffluentisobviouslyimprovedthroughthedoublezeolite-BAFsystem.K
7、eywords:cornsilage;modifiedzeolite;biofilm;effluent;pre-denitrification近年来,我国畜牧业发展非常迅速,在舍饲规模污染了周边的水环境。安徽凤阳某农牧科技发展有条件下,牛羊以全株玉米青贮饲料为主要日粮模式。限公司,以饲养奶牛为主,每年全株玉米青贮渗出液在青贮调制过程中,会形成大量的植物汁液,如果超导致周围水体鱼类死亡,经济损失约3
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