反冲洗周期对生物除锰滤池去除效果的影响
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2020-02-22 09:28:40
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第8卷第1期环境工程学报Vol.8,No.12014年1月ChineseJournalofEnvironmentalEngineeringJan.2014反冲洗周期对生物除锰滤池去除效果的影响程庆锋1李冬2李相昆1孟令威1张杰1*(1.哈尔滨工业大学城市水资源与水环境国家重点实验室,哈尔滨150090;2.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)摘要反冲洗周期是生物除铁除锰滤池的一个重要运行参数,实验中分别设定反冲洗周期为24、48和72h,考察反冲洗周期对成熟稳定运行的滤柱出水铁、锰、氨氮和浊度的影响。结果表明,不同反冲洗周期,滤柱对铁、锰和氨氮均有很好的去除效果,出水中的总Fe、Mn2+和NH+4-N的平均浓度分别为0.018、0.003和0.016mg/L,0.010、0.001和0.014mg/L,0.013、0.001和0.014mg/L,均远低于国家标准,说明反冲洗周期变化对三者的去除效果没有影响。反冲洗周期为24、48和72h时,出水平均浊度分别为0.27、0.38和0.57NTU,反冲洗周期越长,出水浊度越高。滤柱沿程浊度分析发现,浊度主要在0~0.4m去除,出水浊度与滤层厚度无关。反冲洗后5min出水浊度为3.16NTU,15min降到了1NTU以下,25min降到了0.5NTU,60min大约降到了反冲洗前的水平。关键词生物除锰浊度反冲洗周期铁锰氨氮中图分类号X703.1文献标识码A文章编号1673-9108(2014)01-0072-05InfluenceofbackwashingperiodonremovalefficiencyinabiologicalmanganeseremovalfilterChengQingfeng1LiDong2LiXiangkun1MengLingwei1ZhangJie1(1.StateKeyLaboratoryofUrbanWaterResourceandEnvironment,HarbinInstituteofTechnology,Harbin150090,China;2.KeyLaboratoryofBeijingforWaterQualityScienceandWaterEnvironmentRecoveryEngineering,BeijingUniversityofTechnology,Beijing100124,China)AbstractBackwashingperiodisoneofthemostcriticaloperationalparametersforbiologicalironandmanganeseremovalfilter.Inordertoinvestigatetheeffectofbackwashingperiodoniron,manganese,ammoniaandturbidityineffluentofmaturefilter,threebackwashingperiodswereadoptedwith24h,48h,72h.Resultsshowedthattotaliron,manganeseandammoniahadahighremovalrateindifferentbackwashingperiods,theaverageconcentrationoftotaliron,manganeseandammoniaineffluentwere0.018,0.003and0.016mg/L,0.010,0.001and0.014mg/L,0.013,0.001and0.014mg/L,respectively.Eachofthemwasbetterthanthenationalstandard,whichillustratedthatvaryingbackwashingperiodhadnoinfluenceontheremovalefficiencyofthem.Theturbidityineffluentwas0.27NTU,0.38NTU,0.57NTU,respectively,whenthebackwashingpe-riodswere24h,48h,72h.Thelongerbackwashingperiod,thehigherturbidityineffluent.Turbiditywasmainlyremovedin0~0.4m,andtheturbidityineffluenthadnothingtodowiththeheightofthemedia.Theturbidityineffluentwas3.16NTU5minutesafterbackwashing,thendecre
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