正反粒径混合级配钢渣灰岩人工湿地处理生活污水的试验研究_黄玲

第一作者:黄玲,女,1972年生,博士,副教授,主要从事水污染控制工程方面的教学与研究工作。*国家水体污染控制与治理科技重大专项(No.2008ZX07209-003);华北科技学院基金资助项目(No.2006B-29)。正反粒径混合级配钢渣灰岩人工湿地处理生活污水的试验研究*黄玲1,2何绪文2(1.华北科技学院环境工程系,北京101601;2.中国矿业大学(北京)化学与环境工程学院,北京100083)摘要构建小试试验研究了正反粒径混合级配填铺与正粒径级配填铺(组合填料为钢渣与灰岩)的垂直潜流人工湿地单元对生活污水中各主要指标的降解效果,同时比较分析了填料填铺方式对缓解人工湿地堵塞问题的影响。结果表明,当原水COD在134.72～653.33mg/L、NH3-N在42.72～272.60mg/L,TN在107.40～689.35mg/L、PO3-4-P在1.29～8.36mg/L时,正反粒径混合级配填铺的人工湿地对COD、NH3-N、TN的去除效果略好于正粒径级配填铺的人工湿地。钢渣与灰岩的组合填料适于生活污水的处理,尤其利于氮、磷的去除。在运行末期,正反粒径混合级配填铺人工湿地单元出流体积大于正粒径级配填铺人工湿地单元,而前者出流时间短于后者。因此,正反粒径混合级配填铺可在一定程度上缓解人工湿地的堵塞状况。关键词正粒径反粒径堵塞钢渣灰岩人工湿地Constructionofsteelslag-limestonewetlandwithmixedprogressively-sizedandanti-sizedbedforlivingsewagetreatmentHUANGLing1,2,HEXuwen2.(1.DepartmentofEnvironmentalEngineering,NorthChinaInstituteofScienceandTechnology,Beijing101601;2.SchoolofChemicalandEnvironmentalEngineering,ChinaUniversityofMiningandTechnology,Beijing100083)Abstract:Twoparallellab-scalesteelslag-limestoneconstructwetlandswereestablishedfortreatmentoflivingsewage.Thetwowetlandshadsameconfigurationbutdifferentarrangementofbedmedia,namelyprogressively-sizedbedandmixedprogressively-sized/anti-sizedbed.Theperformanceoftwowetlandswerestudiedandcompared,thecloggingproblemscausedbydifferentbedstructurewereanalyzed.Experimentalresultsindicatedthatthemixedbedsystemshadconsiderablecapacityfortheremovaloforganicmatterandinorganicnutrients,whentheconcentrationrangeofCOD,NH3-N,TNandPO3-4-Pwas134.72-653.33,42.72-272.60,107.40-689.35and1.29-8.36mg/L,theremovalrateofCOD,NH3-NandTNbymixedbedsystemwaslittlehigherthanthatofprogressively-sizedsystem.Thesteelslagandlimestonemixedfillingwasbenefitfordealinglivingsewage,especiallyforremovingnitrogenandphosphorus.Atthenendofoperatingperiod,theeffluentvolumeofmixedbedsystemswaslargerthanthatofpro-gressively-sizedbedsystem,whiletheeffluenttimeoftheformerwasshorted,whichdemonstratedaclearadvantageofmixedbedsysteminslowdownthecloggingofbedmedia.Keywords:progressively-sized;anti-sized;clogging;steelslag;limesto