生物膜法过量储存_SND作用脱氮特性_李军

生物膜法过量储存-SND作用脱氮特性李军,郭伟,王秋颖(北京工业大学建筑工程学院,北京　100022,E-mail:lj21c@263.net)摘要:对淹没式生物膜工艺中所表现出来的脱氮特性进行了探讨.厌氧段脱氮主要靠生物膜对含碳氮有机物的过量储存作用;好氧段脱氮主要靠生物膜的SND作用.反硝化的有机碳源主要为生物膜中在厌氧段过量储存的有机碳源;并提出了过量储存-SND脱氮作用机理.确定出优势菌属为假单胞菌属,其依次顺序为气单胞菌属、芽孢杆菌属、微球菌属、硝化杆菌属.关键词:生物膜;过量储存;生物脱氮;SND;假单胞菌属中图分类号:X703.1　文献标识码:A　文章编号:0250-3301(2002)增刊-05-0031基金项目:北京市科技新星项目(9558100800);北京市留学基金资助项目作者简介:李军(1970～),男,博士后,副教授.主要研究方向为水污染控制.CharacteristicsofNitrogenRemovalbyOverStorage-SimultaneousNitri-ficationandDenitrificationinSubmergedBiofilmProcessLiJun,GuoWei,WangQiuying(CollegeofCivilEngineering&Architecture,BeijingPolytechnicUniversity,Beijing　100022,ChinaE-mail:lj21c@263.net)Abstract:Thearticlediscussesthenitrogenremovalcharacteristicsinsequencingbatchreactorofsubmergedbiofilmpro-cess.Nitrogenremovalintheanaerobicphasedependedlargelyontheoverstoragefunctionofthebiofilmtothecarbona-ceousandnitrogenousorganism,andnitrogenremovalintheaerobicphasedependedonthesimultaneousnitrificationanddenitrification(SND)functionofbiofilm.Theorganiccarbonoverstoragedintheanaerobicphraseinthebiofilmprovidedthemajoroforganiccarbonintheprocessofdenitrification.Italsosetupthemechanismofoverstorage-nitrogenremovalwithSND.ItwascertainthatthedominantbacterialspecieswasPseudomonasandthenAeromonas,Bacillus,Micro-coccus,Nitrobacterinthesubmergedbiofilmprocess.Keywords:biofilm;overstorage;biologicalnitrogenremoval;simultaneousnitrificationanddenitrification;pseudomonas　　生物膜法具有单位体积生物量大、抗冲击能力强、污泥易于沉淀、运行管理方便以及省能的优点.同时微生物呈固着态,有利于将微生物保持在反应器内和优势菌属的培养