缺氧区、好氧区容积比对A2O工艺反硝化除磷的影响

缺氧区、好氧区容积比对A2/O工艺反硝化除磷的影响曹雪梅1,彭永臻1,2,王淑莹2(1.哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090;2.北京工业大学环境与能源工程学院,北京100022)摘要:反硝化除磷菌可以在碳源不足的条件下,通过“一碳两用”的方式同时实现反硝化脱氮和吸磷过程,有研究表明,A2/O工艺中存在反硝化除磷现象。为此以啤酒废水为处理对象,研究了缺氧区与好氧区容积比对A2/O工艺反硝化除磷的影响。试验结果表明,在缺氧区与好氧区容积比分别为0.33、0.48、0.60的条件下,A2/O系统对总氮的平均去除率分别为68.04%、79.64%和85.70%,对总磷的平均去除率分别为85.38%、90.80%和96.84%,对COD的去除率均在90%以上。此外,如果继续增大缺氧区与好氧区容积比,应适当调整内循环比,否则会由于缺氧区硝酸盐浓度不够而发生二次释磷现象。基金项目:国家高技术研究发展计划(863)项目(2003AA601010);国家自然科学基金重点资助项目(50138010)关键词:A2/O工艺;反硝化除磷;容积比;啤酒废水中图分类号:X703.1文献标识码:A文章编号:1000-4602(2007)03-0027-04InfluenceofVolumeRatioofAnoxicZonetoAerobicZoneonDenitrifyingPhosphorusRemovalinA2/OProcessCAOXue2mei1,PENGYong2zhen1,2,WANGShu2ying2(1.SchoolofMunicipalandEnvironmentalEngineering,HarbinInstituteofTechnology,Harbin150090,China;2.SchoolofEnvironmentalandEnergyEngineering,BeijingUniversityofTechnology,Beijing100022,China)Abstract:Undertheconditionofinsufficientcarbonsource,denitrifyingphosphorusremovalbac2teriacanutilizenitrateastheelectronacceptortotakeupphosphorusbysinglecarbonsource.Itiscon2firmedthatdenitrifyingphosphorusremovalbacteriaexistinA2/Oprocess.Therefore,theinfluenceofthevolumeratiosofanoxiczonetoaerobiczoneondenitrifyingphosphorusremovalintheA2/Oprocessfortreatingbrewerywastewaterwasstudied.Theresultsshowthatwhenthevolumeratiosofanoxiczonetoaerobiczoneare0.33,0.48and0.60,theresultingaveragetotalnitrogenremovalefficienciesare68.04%,79.64%and85.70%,theaveragephosphorusremovalefficienciesare85.38%,90.80%and96.84%,respectively.Also,theaverageCODremovalefficienciesunderthethreeratiosareallhigherthan90%.Therefore,whenthevolumeratiosofanoxiczonetoaerobiczonecontinuetobein2creased,internalrecirculationratioshallbeadjusted,otherwisethenitrateconcentrationwillnotbee2noughinanoxiczoneandphosphoruswillbereleasedagain.Keywords:A2/Oprocess;denitrifyingphosphorusremoval;volumeratio;brewerywastewater·72·第23卷第3期2007年2月中国给水排水CHINAWATER&WASTEWATERVol.23No.3Feb.2007©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.http://www.cn