SBR无厌氧段实现生物除磷

SBR无厌氧段实现生物除磷王冬波,李小明*,杨麒,张杰,刘依磷,柳娴,贾斌,曾光明,廖德祥(湖南大学环境科学与工程学院,长沙410082)摘要:研究了SBR在模拟城市生活污水处理中的除磷效果.结果表明,SBR在进水后未经过传统除磷理论认为所必须的厌氧段而直接好氧曝气,废水中磷的浓度仍下降较快.在曝气时间为4h,进水COD浓度为400mg#L-1左右,反应过程中pH值710?012时,进水中TP浓度由15~20mg#L-1降到1mg#L-1以下,磷的去除效率达到90%以上.反应过程中传统的储能物质多B-羟基烷酸盐(PHA)基本保持不变且含量较低(PHA浓度在5mg#L-1左右),聚合磷酸盐(聚磷)在4h好氧阶段呈先下降后上升的趋势(好氧开始时聚磷含量为831034mg#g-1,好氧1h时污泥中聚磷含量为791980mg#g-1,好氧结束时聚磷含量为831086mg#g-1),在015h沉淀和315h静置期内聚磷没有明显的水解现象.此研究表明在无厌氧段、无PHA合成而直接好氧曝气,聚磷菌亦能将废水中磷酸盐合成聚磷,通过排除富磷污泥而达到除磷目的,这和传统的理论与研究有所区别.关键词:SBR;多B羟基烷酸盐;聚磷中图分类号:X703.1文献标识码:A文章编号:0250-3301(2008)07-1867-07收稿日期:2007-07-12;修订日期:2007-08-30基金项目:教育部新世纪优秀人才支持计划项目(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,博士,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.comBiologicalPhosphorusRemovalinSequencingBatchReactorWithoutAnaerobicPhaseWANGDong-bo,LIXiao-ming,YANGQi,ZHANGJie,LIUY-ilin,LIUXian,JIABin,ZENGGuang-ming,LIAODe-xiang(CollegeofEnvironmentalScienceandEngineering,HunanUniversity,Changsha410082,China)Abstract:Theperformanceofphosphorusremovalwithasequencingbatchreactorwasinvestigatedbysimulatedmunicipalwastewater.Theexperimentalresultsshowedthatphosphorusremovalcouldbeachievedinsequencingbatchreactorwithoutanaerobicphase,whichwasconventionallyconsideredasakeyphaseforphosphorusremoval.Phosphorusconcentrationintheeffluentwas110mg#L-1belowafter4haeration,duringwhichpHwas710?012.Whichindicatedtheremovalrateofphosphoruswasabove90%whentheCODandphosphorusconcentrationofinfluentwereabout400mg#L-1,15-20mg#L-1,respectively.Intracellularstorageofpoly-phosphate(poly-P)wasincreasingintheaerationafterdecreasinginfirsthouraeration(thecontentofpoly-Pwas831034mg#g-1atthebeginningofaerobicphase,791980mg#g-1infirstaerationand831086mg#g-1inend),buttheenergystoragepoly-B-hydroxyalkanoates(PHA)wasconstantnearlyandthecontentwasverylow(PHAconcentrationwasabout5mg#L-1).Theresearchesindicatedthatphosphatecouldbetransformedtopoly-Pbypoly-phosphate-accu