潮汐流人工湿地低温下NH4＋-N去除模型的比较和优化  

Comparison and optimization of a NH_4^+-N removal model of a tidal-flow constructed wetland in low temperature seasons

作　　者：叶捷[1,2] 彭剑峰[2] 高红杰[2] 宋永会[2] 邱光磊[2] 张盼月[1,3] 曾光明[1] 

机构地区：[1]湖南大学环境科学与工程学院,环境生物与控制教育部重点实验室(湖南大学),长沙410082 [2]中国环境科学研究院,城市水环境研究室,北京100012 [3]北京林业大学,环境科学与工程学院,北京100083

出　　处：《环境科学学报》2011年第7期1456-1463,共8页Acta Scientiae Circumstantiae

基　　金：水体污染控制与治理科技重大专项课题(No.2008ZX07208-003);国家自然科学基金项目(No.50708101/E080402)~~

摘　　要：针对目前人工湿地在低温条件下脱氮效能降低的问题,本研究对每天3个运行周期的潮汐流人工湿地在低温条件下对NH4+-N的处理效能进行研究,同时利用表观动力学模型、多元参数回归模型及Monod机制模型对NH4+-N的去除过程进行拟合.结果显示,在平均水温为9～13℃条件下,每天3个运行周期的潮汐流人工湿地对NH4+-N有良好的去除效果,同时Monod机制模型对NH4+-N的去除过程具有最优的拟合结果,可决系数R2=0.9035.在此基础上,利用修正的摩尔斯分类筛选法对Monod机制模型参数进行局部灵敏度分析,结果表明,在Monod机制模型中,进水NH4+-N浓度为高灵敏参数,其对反应器内NH4+-N的去除影响最大,平均水温(T)为灵敏参数,DO为中等灵敏参数.To solve the problem of the low efficiency of nitrogen removal under low temperatures in constructed wetlands,we studied the treatment performance of a tidal-flow constructed wetland with three running cycles per day under low temperature conditions.We simulated the NH＋4-N removal using the apparent kinetic model,multiple regression model and Monod-mechanism model.The experimental results showed that the tidal-flow constructed wetland with three running cycles per day had a high efficiency for NH＋4-N removal at 9~13 ℃ and it fit the Monod-mechanism model reasonably well,with a coefficient of determination R2 of 0.9035.Based on this conclusion,the local sensitivity of the Monod-mechanism model was analyzed by modified Morris screening which showed that in the Monod-mechanism model,Cin was a highly sensitive parameter,the average water temperature（T） was a sensitive parameter and DO was a medium sensitive parameter.

关 键 词：潮汐流人工湿地 NH4+-N 低温 动力学模型 摩尔斯分类筛选法 局部灵敏度分析 

分 类 号：X703[环境科学与工程—环境工程]