生物滤池净化含铁锰高氨氮地下水试验研究

中国环境科学2014,34(8)：1993~1997ChinaEnvironmentalScience生物滤池净化含铁锰高氨氮地下水试验研究蔡言安1,李冬1*,曾辉平1,罗亚红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实验室,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：以中试有机玻璃滤柱反应器进行伴生高浓度氨氮含铁锰地下水生物同步净化试验研究,结果表明,进水氨氮浓度高于2.0mg/L时,溶解氧浓度是限制锰与氨氮去除的主要原因.下向流底部曝气过滤运行(气水逆向)可解决溶解氧不足的问题,但滤柱滤水能力有限;上向流底部曝气过滤(气水同向)同样可以满足铁锰氨氮氧化需氧量,然而曝气扰动作用削弱了滤池过滤截留能力造成铁锰氧化物穿透滤层,致使滤层出水铁锰浓度无法满足标准要求,曝气量越大,其滤池截留能力越弱.关键词：除铁除锰；曝气生物滤；硝化作用；地下饮用水中图分类号：X523文献标识码：A文章编号：1000-6923(2014)08-1993-05Removalofiron,manganeseandhighammoniafromgroundwaterbybiofilter.CAIYan-an1,LIDong1*,ZENGHui-ping1,LUOYa-hong1,ZHANGJie1,2(1.KeyLaboratoryofBeijingWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124,China；2.StateKeyLaboratoryofUrbanWaterResourceandEnvironment,HarbinInstituteofTechnology,Harbin150090,China).ChinaEnvironmentalScience,2014,34(8)：1993~1997Abstract：Apilot-scalebiologicalfilterwasconstructedtoremovalofiron,manganeseandhighammoniasimultaneouslyfromgroundwater.Theresultsindicatedthatthefailureofmanganeseandammoniaoxidationwhentheinfluentammoniaconcentrationwasabove2.0mg/Lwithoutextraaeration.Oxidationofiron,manganeseandammoniacouldbecompletedbydownflowfiltrationwiththeaerationatthebottomofthefilterbed,whiletheprocessingcapacitywasaffectedsignificantlyandwasnotsuitableforapplicationofthebiofilter.Theupflowfiltrationwiththesameaerationmodecouldalsomettheoxygendemandsoftheoxidationprocess,however,theoxidizedironandmanganesewereeasilytakenoutfilterbed,causinghighironandmanganeseconcentrationintheeffluent.Fortheupflowfiltrationwithextraaerationatthebottomofthefilterbed,theexperimentsdemonstratedthattheinterceptingcapacityoffilterwasdamagedsignificantlybydisturbanceofaerationcomparedtothecaseofupflowfiltrationwithoutaerationandwasinverselycorrelatedwiththeaerationintensity.Keywords：ironandmanganeseremoval；biologicalaeratedfilter；nitrification；drinkingwater铁锰通常以可溶性还原价态存在于地下水中,作为饮用水地下水源,若不加处理,会给人们日常生活带来诸多不便,例如,堵塞管道、衣物着色及水厂一些运行问题等[1-2].生物除铁除锰技术以其独特的高效、节能、无需投加化学