中试MBBR装置强化氨氮去除速率的影响条件研究  

Enhanced ammonia removal rate in a pilot-scale MBBR

作　　者：郑敏[1] 杨波[2] 汪诚文[1] 贾捍卫[3] 

机构地区：[1]清华大学环境学院,北京100084 [2]邯郸市环境保护局,河北邯郸056002 [3]北京国环清华环境工程设计研究院,北京100084

出　　处：《中国环境科学》2012年第10期1778-1783,共6页China Environmental Science

基　　金：深圳市财政支持项目(SZCG2007046206);水体污染控制与治理科技重大专项(2008ZX07313)

摘　　要：采用中试MBBR组合工艺处理深圳市布吉河道的城镇污水,进水平均氨氮浓度为(25.88±7.73)mg/L,出水平均为(1.11±1.93)mg/L.单因素小试研究表明,反应器中挂有生物膜的悬浮填料具有强化氨氮去除的效果,投加该填料时获得的比氨氧化速率比采用活性污泥进行反应提高了25.5%;试验条件下通过投加甲醇将COD从139mg/L提高至587mg/L,比氨氧化速率从2.55mg/(gMLVSS.h)下降至1.91mg/(gMLVSS.h);当MLVSS浓度从0.45g/L逐步提高到4.05g/L时,容积氨氧化速率从3.68mg/(L.h)线性增加至7.82mg/(L h),拟合度R2为0.967,但比氨氧化速率随MLVSS浓度的提高反而逐渐下降,从8.24mg/(gMLVSS.h)降至1.93mg/(gMLVSS.h);当温度从5℃升高到35℃,比氨氧化速率从0.99mg/(gMLVSS.h)提高至2.89mg/(gMLVSS.h),采用Arrhenius经验方程描述时,拟合度R2为0.970;当DO浓度从0.5mg/L逐步增加至4.0mg/L时,比氨氧化速率从0.62mg/(gMLVSS.h)提高至2.28mg/(gMLVSS.h),Monod方程可以很好的描述DO浓度与比氨氧化速率之间的关系,拟合度R2为0.994,氨氧化半饱和常数值为3.0mg O2/L.A combined pilot-scale MBBR process was used for treatment of the wastewater in the Buji River in Shenzhen city.The averaged influent and effluent ammonia nitrogen concentrations were（25.88±7.73） mg/L and（1.11±1.93）mg/L,respectively.The results of the single factor experiments show that the biofilm fillers enhanced the ammonia removal and increased the specific ammonia oxidation rate by 25.5% to activated sludge.The specific rate decreased from 2.55mg/（gMLVSS.h） to 1.91mg/（gMLVSS.h） with the COD increasing from 139mg/L to 587mg/L,decreased from 8.24mg/（gMLVSS.h） to 1.93mg/（gMLVSS.h） with the MLVSS increasing from 0.45g/L to 4.05g/L,increased from 0.99mg/（gMLVSS.h） to 2.89mg/（gMLVSS.h） with the temperature increasing from 5℃ to 35℃ and increased from 0.62mg/（gMLVSS.h） to 2.28mg/（gMLVSS.h） with the DO concentration increasing from 0.5mg/L to 4.0mg/L,respectively.However,the volume ammonia oxidation rate increased linearly from 3.68mg/（L.h） to 7.82mg/（L.h） with the increased MLVSS（R2= 0.967）.The Arrhenius experience equation was used to describe the influence of temperature（R2 = 0.970）.The Monod equation fitted the process well（R2 = 0.994） and the estimated half saturation constant of ammonia oxidation was 3.0mg O2/L.

关 键 词：移动床生物膜反应器 氨氮去除率 氨氧化速率 悬浮填料 

分 类 号：X703.1[环境科学与工程—环境工程]