叠式曝气生物滤池预处理高氨氮原水_陆少鸣

工程实例叠式曝气生物滤池预处理高氨氮原水陆少鸣1,黄念禹2,杨立3,任媛媛1(1.华南理工大学环境科学与工程学院,广东广州510006;2.广州市自来水公司,广东广州510017;3.华南理工大学建筑设计研究院,广东广州510006)摘要:针对南方地区存在季节性高氨氮和有机物污染的水源水,采用叠式曝气生物滤池进行生物预处理。枯水期水温≥5℃,滤速为8m/h,气水比为0.5～1.5,原水氨氮、CODMn和浊度的周均值分别为5.02～9.45mg/L、5.79～10.1mg/L和19.7～63.1NTU,叠式滤池出水对应指标分别为0.30～0.96mg/L、3.24～5.85mg/L和3.83～19.9NTU(去除率分别为90.3%、42.7%和66.3%),符合《地表水环境质量标准》(GB3838—2002)的Ⅲ类标准。丰水期滤速为12m/h,气水比为0.3～0.5,原水氨氮、CODMn和浊度的周均值分别为2.19～3.41mg/L、5.30～7.56mg/L和27.3～40.1NTU,叠式滤池出水对应指标分别为0.18～0.41mg/L、2.87～4.50mg/L和5.43～16.8NTU(去除率平均为89.3%、40.2%和65.0%),符合GB3838—2002的Ⅱ类标准。初滤池去除了原水中大部分可滤SS,为曝气生物滤池的稳定运行创造了条件,同时使曝气生物滤池过滤水头损失的24h变化量不超过2kPa,满足了多座滤池共用鼓风曝气系统,实现均匀曝气对过滤水头损失的控制要求。叠式曝气生物滤池的工艺投资约为140～180元/m3,运行费用约为0.05～0.07元/m3。关键词:叠式曝气生物滤池;预处理;浊度;氨氮中图分类号:TU991文献标识码:C文章编号:1000-4602(2009)20-0049-06D-UBAFforPretreatmentofHighAmmoniaNitrogenRawWaterLUShao-ming1,HUANGNian-yu2,YANGLi3,RENYuan-yuan1(1.CollegeofEnvironmentalScienceandEngineering,SouthChinaUniversityofTechnology,Guangzhou510006,China;2.GuangzhouWaterSupplyCompany,Guangzhou510017,China;3.ArchitectureDesignInstitute,SouthChinaUniversityofTechnology,Guangzhou510006,China)Abstract:Accordingtotheseasonalhighammonianitrogenandorganicpollutioninrawwaterinsubtropics,D-UBAFwasusedforitspretreatment.Inlowflowperiod,thetemperatureofrawwaterisa-bove5℃,filtrationrateis8m/h,andgas-waterratiois0.5to1.5.Whentheweeklyaverageconcen-trationsofNH3-N,CODMnandturbidityofrawwaterare5.02to9.45mg/L,5.79to10.1mg/Land19.7to63.1NTU,thecorrespondingindexesofthetreatedwaterfromD-UBAFare0.30to0.96mg/L,3.24to5.85mg/Land3.83to19.9NTU,andtheremovalratesare90.3%,42.7%and66.3%re-spectively,whichmeettheⅢcriteriaspecifiedinEnvironmentalQualityStandardsforSurfaceWater(GB3838-2002).Inhighflowperiod,theoperatingparametersarefiltrationrateof12m/handgas-waterratioof0.3to0.5.WhentheweeklyaverageconcentrationsofNH3-N,CODMnandturbidityofrawwaterare2.19to3.41mg/L,5.30to7.56mg/Land27.3to40.1NTU,thecorrespondinginde-xesofthetreatedwaterfromD-UBAFare0.18to0.41mg/L,2.87to4.50mg/Land5.43to16.8NTU,andt