生物滤池同步净化低温高铁锰氨氮地下水

中国环境科学2019,39(8)：3300~3307ChinaEnvironmentalScience生物滤池同步净化低温高铁锰氨氮地下水王刘煜1,李冬1*,曾辉平1,张杰1,2(1.北京工业大学水质科学与水环境恢复工程北京市重点试验室,北京100124；2.哈尔滨工业大学城市水资源与水环境国家重点试验室,黑龙江哈尔滨150090)摘要：为实现低温(5~6℃)高铁锰氨氮［TFe:9~15mg/L,Fe2+:6~12mg/L,Mn2+:0.8~1.2mg/L,NH3-N:0.9~1.4mg/L］地下水的生物同步净化,以水厂实地滤柱进行实验.结果表明,在该种水质下,以1.0,3.0m/h滤速启动生物滤柱,分别历经128,91d启动成功.铁和氨氮自启动之初出水即合格,锰的去除仍然是滤池成熟的决定性因素.溶解氧(DO)充足条件下,净化所需滤层厚度随氨氮浓度的升高而加厚,氨氮极限去除浓度为1.60mg/L.进水DO不足是限制氨氮继续提升的主要因素.滤速越大,锰的去除量越少,净化所需滤层越厚,滤柱极限运行滤速为8.0m/h.沿程分析发现,铁和锰的氧化去除存在显著分级,铁和氨氮在滤层内可同步氧化去除,锰的高效氧化去除区间相对滞后.关键词：低温；高铁锰氨氮；地下水；同步净化；溶解氧；滤层厚度中图分类号：X523文献标识码：A文章编号：1000-6923(2019)08-3300-08Simultaneouspurificationofhigh-iron,manganeseandammonianitrogenfromlowtemperaturegroundwaterinbiologicalfilter.WANGLiu-yu1,LIDong1*,ZENGHui-ping1,ZHANGJie1,2(1.KeyLaboratoryofBeijingWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124,China；2.StateKeyLaboratoryofUrbanWaterResourceandEnvironment,HarbinInstituteofTechnology,Harbin150090,China).ChinaEnvironmentalScience,2019,39(8)：3300~3307Abstract：Apilot-scalebio-filterwasconstructedfortheremovalofhighconcentrationsofiron(TFe:9~15mg/L,Fe2+:6~12mg/L),manganese(Mn2+:0.8~1.2mg/L),andammonianitrogen(NH3-N:0.9~1.4mg/L)simultaneouslyfromlowtemperature(5~6℃)groundwater.Pilot-scalebio-filterwerestartedseparatelybyusingthe1.0m/hand3.0m/hwerestartedsuccessfullyafter128dand91d,respectively.Ironandammonianitrogenwereremovedatthebeginningofthebio-filterstart-up,Mnremovalremainsadecisivefactorinfiltermaturity.Therequiredthicknessofthebio-filterrequiredforpurificationincreasedastheconcentrationofammonianitrogenincreasedwhendissolvedoxygen(DO)wassufficient.Themaximumremovalofammonianitrogenwasabout1.60mg/L.DOdeficiencywasthemainfactorlimitingthefurtherincreaseofammonianitrogen.Forhigherfiltrationrates,theremovalofmanganesewasless,andthethickerthefilterlayerrequiredforpurification.Themaximumfiltrationrateofthesinglebio-filterwas8.0m/h.Analysisalongtheway,thereweresignificantremovalclassificationbetweenFea