两段曝气生物滤池的同步硝化反硝化特性_王春荣

中国环境科学2005,25(1)：70~74ChinaEnvironmentalScience两段曝气生物滤池的同步硝化反硝化特性王春荣1,王宝贞1*,王琳2(1.哈尔滨工业大学水污染控制研究中心,黑龙江哈尔滨150090；2.中国海洋大学环境科学与工程学院,山东青岛266003)摘要：采用两段曝气生物滤池进行了实际生活污水的试验研究,控制A段水力负荷在22.01m3/(m2⋅d),气水比为6:1,研究了B段气水比分别为3:1、2:1和1:1时,反应器的运行情况.结果表明,两段曝气生物滤池处理生活污水的出水稳定,当B段反应器的气水比为2:1时,去除效果最佳.B段具有明显的同步硝化反硝化特征,当气水比较低时主要进行短程的同步硝化反硝化.对B段反应器0.9m高度处的生物膜进行了静态试验,结果表明,生物膜的比硝化速率为1.458mgNH3-N/(gMLSS⋅h);当DO和pH值等影响因子适宜的情况下,有机碳源的存在不影响硝化作用的进行;反硝化过程中,对亚硝酸进行反硝化的速率比对硝酸盐进行反硝化的速率高1.15倍,缩短了反硝化所需时间.关键词：两段曝气生物滤池；同步硝化反硝化；短程硝化反硝化；气水比中图分类号：X703文献标识码：A文章编号：1000-6923(2005)01-0070-05Thesimultaneousnitrificationanddenitrificationcharacteristicsoftwo-stagebiologicalaeratedfilter.WANGChun-rong1,WANGBao-zhen1,WANGLin2(1.WaterPollutionControlResearchCenter,HarbinInstituteofTechnology,Harbin150090,China；2.SchoolofEnvironmentalScienceandEngineering,OceanUniversityofChina,Qingdao266003,China).ChinaEnvironmentalScience,2005,25(1)：70~74Abstract：Thetwo-stagebiologicalaeratedfilter(BAF)wasadoptedtocarryouttheexperimentalstudyofactualdomesticwastewater,thehydraulicloadingof22.01m3/(m2⋅d)andtheair/waterratioof6:1atA-stagewerecontrolled,whenair/waterratiowas3:1,2:1and1:1respectivelyatB-stage,theoperationstateofreactorwasstudied.Theeffluentqualitywasstableandexcellent,andtheremovaleffectofeverypollutantswasthebestwhentheair/waterratiowas2:1atB-stagereactor.B-stagepossessedmarkedofsimultaneousnitrificationanddenitrificationcharacteristics.Short-cutsimultaneousnitrificationanddenitrificationwascarriedoutmainlywhenair/waterratiowaslower.Staticexperimentwascarriedoutforbiofilmat0.9-meterheightofB-stagereactor.Thespecificnitrificationrateofthebiofilmwas1.458mgNH3-N/(gMLSS⋅h);theexistenceoforganiccarbonsourcedidnotaffecttheoperationofnitrificationundertheadaptablestateofaffectingfactors,suchasDOandpH,etal.Indenitrificationprocessthedenitrificationrateovernitritewas1.15timeshigherofthatovernitrate,thus,thedenitrificationtimewasalsoshortened.Keywords：Two-stagebiologicalaeratedfilter；simultaneousnitrificationanddenitrification；sh