炭管膜曝气生物膜反应器SNAD脱氮研究_王芳

第3卷第3期环境工程学报Vol.3,No.32009年3月ChineseJournalofEnvironmentalEngineeringMar.2009炭管膜曝气生物膜反应器SNAD脱氮研究王芳杨凤林＊宫正刘思彤胡绍伟练建军(大连理工大学环境与生命学院工业生态与环境工程教育部重点实验室,大连116024)摘要以包裹无纺布的微孔炭管作为膜曝气生物膜反应器(MABR)的膜组件,进行了短程硝化,厌氧氨氧化和反硝化耦合脱氮(SNAD)研究。实验中,控制温度34±1℃,pH7.5～8.5,HRT8h,通过逐步降低膜内压力使反应器中的溶解氧由8mg/L逐步降低到0.5mg/L以下。实验采用亚硝酸细菌挂膜,然后接种厌氧氨氧化细菌,实现在单一反应器中同时发生短程硝化、厌氧氨氧化和反硝化耦合脱氮功能。结果表明,经过180d的连续稳定运行,氨氮去除率达到了93.4%,总氮去除率达到了92.5%,COD去除率达到97.2%,氨氮去除负荷0.6kgN/(m3·d)。适合SNAD工艺的最佳C/N比为0.2～0.6,当COD浓度过高时,会抑制厌氧氨氧化细菌,使SNAD工艺的处理效果明显下降。关键词炭管膜曝气生物膜反应器短程硝化厌氧氨氧化反硝化中图分类号X703.1文献标识码A文章编号1673-9108(2009)03-0405-04SNADfornitrogenremovalusingcarbontubemembrane-aeratedbiofilmreactorWangFangYangFenglinGongZhengLiuSitongHuShaoweiLianJianjun(KeyLaboratoryofIndustrialEcologyandEnvironmentalEngineeringofNationalMinistryofEducation,SchoolofEnvironmentalandBiologicalScienceandTechnology,DalianUniversityofTechnology,Dalian116024)AbstractAlab-scalemembrane-aeratedbiofilmbioreactor(MABR)equippedwithnonwovenfabricssup-portaroundthegas-permeablecarbontubewasdevelopedfortheremovalofammoniumbasedonsimultaneouspartialnitrification,anaerobicammoniumoxidizationanddenitrification(SNAD).Thetemperature,pHandHRTwerecontrolledat34±1℃,7.5～8.5and8h.Bydecreasingtheairpressureinthecarbontubegradual-ly,DOinthereactorwasdecreasedfrom8mg/Lto0.5mg/L.Initially,thereactorwasinoculatedwithnitrif-yingbiomass.Subsequently,anammoxbiomasswasinoculatedtostartupSNADsysteminonereactor.There-sultsshowedthatafter180dofoperation,93.4%ofNH+4-Nremovalrate,92.5%ofTNremovalrateand97.2%ofCODremovalwereachievedinMABR.Theammoniumnitrogenremovalratewas0.6kgN/(m3·d).ThesuitableC/Nratiois0.2～0.6,andthehigherCODwillinhibittheAnammoxbacteriaandmakethereactorperformanceworsen.KeywordsCMABR;short-cutnitrification;Anammox;denitrification基金项目:国家自然科学基金资助项目(50578023)收稿日期:2008-07-15;修订日期:2008-08-04作者简介:王芳(1982～),女,硕士研究生,主要从事水污染控制工程生物脱氮理论与技术研究工作。E-mail:bingxiao302002@yahoo.com.cn＊通讯联系人,E-mail:yangfl@dlut.edu.cnCANON(completelyautotrophicnitrogenremo-valovernitrite)工艺作为一种高效低耗的脱氮工艺最早于2002年由