单一缺氧_厌氧UASB同步反硝化_省略_A_O组合工艺处理实际晚期渗滤液_孙洪伟

第60卷第11期化工学报Vol.60No.112009年11月CIESCJournalNovember2009研究论文单一缺氧/厌氧UASB同步反硝化产甲烷与A/O组合工艺处理实际晚期渗滤液孙洪伟,王淑莹,时晓宁,张树军,杨庆,彭永臻(北京工业大学北京市水质科学与水环境恢复工程重点实验室,北京100124)摘要:以实际高氮晚期渗滤液为研究对象,应用缺氧/厌氧UASB-A/O组合工艺重点研究有机物和氮的去除特性,同时考察了A/O系统内短程硝化实现途径及稳定方法。试验结果表明,该生化系统可实现有机物和氮的同步、深度去除。在原液COD平均为6537mg·L-1,NH+4-N为2021mg·L-1的条件下,系统最终出水分别为300mg·L-1和15.6mg·L-1,去除率分别为95.4%和99.2%。UASB反应器的平均COD负荷为6.5kgCOD·m-3·d-1,去除速率为5.3kgCOD·m-3·d-1。在单一UASB反应器内,发生了缺氧反硝化和厌氧产甲烷的双重生化反应,UASB反应器内获得了几乎100%的反硝化率。通过高游离氨(FA)和游离亚硝酸(FNA)的协同作用,使A/O反应器实现并维持了稳定的短程硝化,通过99%以上的亚硝化率实现高效的氨氮去除。关键词:垃圾渗滤液;同步反硝化产甲烷;生物脱氮;短程硝化;游离氨;游离亚硝酸中图分类号:X703.1文献标识码:A文章编号:0438-1157(2009)11-2891-06Singleanoxic/anaerobicUASBsimultaneousdenitrificationandmethanogenesiscombinedwithA/OfortreatmentofreallandfillleachateSUNHongwei,WANGShuying,SHIXiaoning,ZHANGShujun,YANGQing,PENGYongzhen(KeyLaboratoryofBeijingWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124,China)Abstract:Thetreatmentofrealleachatefrommunicipallandfillwithhighammonianitrogen(NH+4-N)contentwasstudiedbyusingacombinedprocessoflab-scaleanoxic/anaerobicup-flowanaerobicsludgebed(UASB)-A/O.ThemethodforachievingandstabilizingpartialnitrificationintheA/Oreactorwasalsoinvestigated.ExperimentalresultsclearlyshowedthatCODandnitrogencanbesimultaneouslydeeplyremovedwiththiscombinedbiologicalsystem,averageCODandNH+4-Nhavebeenreducedfrom6537mg·L-1and2021mg·L-1intherawleachateto300mg·L-1and15.6mg·L-1,respectively.FortheanoxicUASBreactor,theaverageorganicloadingratereachesto6.5kg·m-3·d-1,anditsaverageorganicremovalrateis5.3kg·m-3·d-1.ThedenitrificationandmethanogenesisaresimultaneouslyconducedintheUASBreactor,andalmost100%denitrificationhasbeenachieved.AstableandlongtermpartialnitrificationhavebeenrealizedbythecooperativeeffectofFAandFAN,theammonianitrogenhasbeenremovedthroughthehighlyeffectivepartialnitrificationwithabove99%nitriteaccumulationrate.Keywords:landfillleachate;simultaneousdenitrificationandmethanogenesis;biologicalnitrogenremoval;partialnitri