内循环SBR反应器无厌氧段实现同步脱氮除磷

内循环SBR反应器无厌氧段实现同步脱氮除磷王冬波,李小明*,曾光明,杨麒,廖德祥,刘精今(湖南大学环境科学与工程学院,长沙�410082)摘要:研究了内循环SBR反应器在模拟城市生活污水处理中脱氮除磷的效果.结果表明,在曝气时间为4h,曝气开始时DO浓度为6mg�L-1,pH值7~8时,反应器对COD、NH+4�N、TP均有较好的去除效果,进水中COD浓度、NH+4�N浓度、TP浓度分别由170~260mg�L-1、20~30mg�L-1、8~20mg�L-1降到出水的4~48mg�L-1、0~2�0mg�L-1和0~1�4mg�L-1,COD、TIN(NH+4�N+NO-3�N+NO-2�N)的去除率分别为89�7%�6�5%、70%左右,NH+4�N的转化率为97�4%�3�6%、TP的去除率为95�6%�4�4%.在本研究的实验过程中反应器进水后未经过传统除磷理论认为所必须的厌氧段而直接曝气,TP的去除效果仍然良好且运行稳定,这和传统的理论与研究有所区别.关键词:SBR;同步脱氮除磷;模拟城市生活污水中图分类号:X703.1�文献标识码:A�文章编号:0250�3301(2007)03�0534�06收稿日期:2006�03�17;修订日期:2006�04�12基金项目:教育部新世纪优秀人才支持计划(NCENT�0770);国家自然科学基金项目(50478054);国际科技合作重点项目(2004DFA06200);长沙市科技计划重点项目(K051132�72)作者简介:王冬波(1981~),男,硕士,主要研究方向为水污染处理技术与控制,E�mail:wwyy44339745@yahoo.com.cn*通讯联系人,E�mail:xmli@hnu.cn;xmli121x@hotmail.comSimultaneousNitrogenandPhosphorusRemovalintheReactorofInnerLoopSBRWithoutAnaerobicPhaseWANGDong�bo,LIXiao�ming,ZENGGuang�ming,YANGQi,LIAODe�xiang,LIUJing�jin(CollegeofEnvironmentalScienceandEngineering,HunanUniversity,Changsha410082,China)Abstract:Theperformanceofsimultaneousnitrogenandphosphorusremovalwithaninnerloopsequencingbatchreactorwereinvestigatedbysimulatedmunicipalwastewater.TheexperimentalresultsshowedthatCOD,NH+4�N,andTPcanberemovedefficientlyafterfourhoursaeration,duringwhichdissolvedoxygenconcentrationwasat6mg�LatthebeginningofaerobicphaseandpHwasintherangof7~8.TheCODandNH+4�NaswellasTPconcentrationintheeffluentwereaboutat4~48mg�L-1,0~2�0mg�L-1,and0~1�4mg�L-1respectively,whichindicatedtheremovalrateforeachitemwereabout89�7%�6�5%,97�4%�3�6%,95�6%�4�4%whentheconcentrationofinfluentwereabout170~260mg�L-1,20~30mg�L-1,8~20mg�L-1,respectively.TheremovalrateofTIN(NH+4�N+NO-3�N+NO-2�N)wasalsoreachedabout70%.Itwasfoundduringtheresearchprocessthatphosphorusremovalcanbeachievedwithoutanaerobicphase,whichwasconventionallyconsideredasakeyphaseforphosphorusremoval,andthisphenomenacannotbeexplainedbytraditionaltheory.Keywords:SBR;simultaneousnitrogenandphosphorusremoval;simulatedmunicipalwastewater��近年来,氮、磷化合物导致水体污染和水质富营养