瓷粒曝气生物滤池处理生活污水的试验研究_金吴云

瓷粒曝气生物滤池处理生活污水的试验研究金吴云1,2,刘灿灿1,2,沈耀良1,2,袁煦1,2(1.苏州科技学院江苏省环境科学与工程重点实验室,江苏苏州215011;2.苏州科技学院环境科学与工程学院,江苏苏州215011)摘要:采用以瓷粒为填料的上流式曝气生物滤池(BAF)处理生活污水,研究了水力停留时间、气水比、进水有机物浓度对处理效果的影响。结果表明,在水温为11.5～32.9℃、气水比为3∶1、COD为90.6～419.0mg/L、NH+4-N为7.85～47.51mg/L、TN为16.76～58.40mg/L、SS为80～270mg/L的条件下,对COD的去除率与水力停留时间并非呈简单的线性关系,最佳的水力停留时间为10h。随着水力停留时间的缩短,对氨氮的去除率下降,对SS的去除率也基本呈下降的趋势,但是差别不大。当气水比为(1∶1)、(3∶1)、(5∶1)时,增加气水比有利于提高对COD和氨氮的去除率,但对TN的去除效果会变差。当进水有机物浓度为100～400mg/L时,随着进水有机物浓度的增加,对COD的去除率升高,对氨氮的去除率则基本保持不变。关键词:上流式曝气生物滤池;生活污水;水力停留时间;气水比;COD中图分类号:X703文献标识码:A文章编号:1000-4602(2008)17-0020-05基金项目:江苏省“333工程”学术带头人资助课题ExperimentalStudyonDomesticSewageTreatmentbyBiologicalAeratedFilterwithPorcelainMediaJINWu-yun1,2,LIUCan-can1,2,SHENYao-liang1,2,YUANXu1,2(1.JiangsuProvincialKeyLabofEnvironmentalScienceandEngineering,SuzhouUniversityofScienceandTechnology,Suzhou215011,China;2.SchoolofEnvironmentalScienceandEngineering,SuzhouUniversityofScienceandTechnology,Suzhou215011,China)Abstract:Theup-flowbiologicalaeratedfilterwithporcelainmediawasadoptedtotreatdomesticsewage.Theinfluenceofhydraulicretentiontime,air/waterratioandinfluentorganicconcentrationontheperformanceofthebiologicalaeratedfilterwasstudied.Theresultsshowthatundertheconditionsoftemperature11.5to32.9℃,air/waterratio3∶1,influentCOD90.6to419.0mg/L,NH+4-N7.85to47.51mg/L,TN16.76to58.40mg/LandSS80to270mg/L,therelationbetweenCODremovalrateandhydraulicretentiontimeisnotlinear,andtheoptimalHRTis10h.WiththedecreaseofHRT,theremovalrateofNH+4-Nisreduced,andtheremovalrateofSSisslightlyreduced.Whentheair/waterratiois1∶1,3∶1and5∶1,theincreasingofair/waterratiocauseshigherremovalratesofCODandNH+4-N,butalowerremovalrateofTN.Whentheinfluentorganicconcentrationis100to400mg/L,withtheincreasingoftheinfluentorganicconcentration,theremovalrateofCODincreases,buttheremovalrateofNH+4-Nischangedhardly.Keywords:up-flowbiologicalaeratedfilter;domesticsewage;hydraulicretentiontime;·20·第24卷第17期2008年9月中国给水排水CHINAWATER＆WASTEWATERVol.24No.17Sep.2008air/waterratio;COD目前,采用陶粒和沸石填料