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ID:28858602
大小:9.82 MB
页数:105页
时间:2018-12-14
《基于沸石吸附固定化微生物sbrsnd脱氮研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、jmmI——AbstractI————Umm一_—Ill宣;宣;i;ii葺AbstractSomeindrinkingwatersourcesofChinashowedmicro-pollutedcharacteristics.Inrecentyears,ChinaissuednewnationalEmissionStandards(GBl8918-2002),whichmayhavebeenduetostricterrequirementsonautoemissionsofCOD,NH4-NandTNinmunicipalwastewateLBiologicalmethodiso
2、neofthemosteffectivewaysforremovalofammoniacalnitrogenatpresent,butmanyproblemscameupinthecurrent.Ithasbecameaurgenttaskforenvironmentalscientiststhattosimplifydenitrificationprocess,reduceoperationcostandmeetthenewneedsofthewastewatertreament.Sequencebatchreactor(SBR)systemsrunningwithalterna
3、tiveanoxicandaerobicprocessesareusedtreatthewastewater,theNHa+一NcanberemovedeffectivelywhileCODareremoved.Naturalzeoliteisanon—metallicmineralwithcharacteristicsofadsorptionandion-exchangeproperties.adualmodeprocessconsistingofionexchangeandbiologicaldecompositionmodeinasinglereactoristhefocus
4、ofnowadaysresearches.ThispaperfirstexperimentalstudyonammoniaremovalbyclinoptilolitefromBaiyinintwokindsofmediawithdifferentdiametersthroughstaticexperiment,andsomezeolitewascarriedOutandmodifiedbyNaCI.Followingtostudyammonia-nitrogenremovalbythemodifiedzeolite.Then,thenitrogenremovalmechanism
5、isdiscussedwhenthenaturalzeolitespowderofammoniumsaturatedwasaddedintotheSBR.Atlast,tostudyammonianitrogenfromslightly—pollutedwaterbyzeolite—microbecombinedimmobilizationtechnologyusingmacroporouscarrierinSBR.11hemainresultsfromthosestudiesaresummarizedasfollowing:1.Underthesameconditions.the
6、ammonia—nitrogenremovalusingsmallsizezeolitewithhJighefficiencyandfastadsorptionrate.TheammonianitrogenadsorptionbynaturalzeoliteswaseffectedwithionexchangingandPhysisorption.2.Inzeolite·SBR,higherCODremovalefficiencycanbemaintained,andthesimultaneousnitrificationanddenitrificationtookplaceint
7、hereactor.ThemodifiedzeolitewithhigherSi,Alnottochangethemonoclinicstructureofclinoptilolite,andm●ii研究生:魏-K-霞专业:环境科学研究方向:环境污粢修复化学生物学II导师:李彦锋教授Abstracttheadsorptioncapacityofammonianitrogenincreased.TheimmobilizedmicrobialbiomassofNa-zeo
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