基于一级动力学模型的水培蔬菜滤床氮磷去除模拟

发布时间：2018-01-16 12:23

本文关键词：基于一级动力学模型的水培蔬菜滤床氮磷去除模拟　出处：《东南大学学报(自然科学版)》2016年04期 　论文类型：期刊论文

【摘要】：采用水培蔬菜滤床(HVFB)净化及经生化处理后的生活污水尾水,并选用一级动力学模型开展HVFB氮磷去除动力学试验研究.基于Arrhenius公式采用试验数据分析水温与一级反应面积速率常数K间关系,采用乘幂和指数回归方程拟合20℃时面积速率常数K20与水力负荷间关系,并构建滤床模型拓展式.Arrhenius拟合结果表明,番茄滤床的氨氮、总氮(TN)和总磷(TP)的温度系数θ值分别为1.08,1.06和1.01,空心菜滤床θ值分别为1.07,1.04和1.00,氨氮、TN的K值与水温呈显著正相关,氨氮的K值受水温影响更为敏感,TP的K值与水温无明显关系.在拟合K_(20)与水力负荷关系上,乘幂回归整体上较指数回归具有更高的准确性.考虑了水温和水力负荷因素的一级动力学模型拓展式的预测具有较高的准确性和可靠性.增强TN去除效率(水温小于19.5℃)和TP去除效率(水温大于19.5℃),可有效提高HVFB整体进水水力负荷.
[Abstract]:A hydroponic vegetables filter bed (HVFB) purification and biochemical treatment of the wastewater of tail water and the first-order kinetic model experimental study on dynamics of nitrogen and phosphorus removal in HVFB. Arrhenius formula by test data analysis of water temperature and the first-order reaction rate constant of K based on the relationship between the area and the power and exponential regression equation fitting 20 C. area rate constant K20 and the relationship between the hydraulic load, and the construction of filter bed model development.Arrhenius fitting results showed that ammonia nitrogen in tomato filter bed (TN), total nitrogen and total phosphorus (TP) temperature coefficient values were 1.08,1.06 and 1.01, spinach bed theta values were 1.07,1.04 and 1, ammonia nitrogen, TN the value of K was positively correlated with water temperature, ammonia nitrogen K value influenced by temperature is more sensitive to TP, the K value has no obvious relationship with water temperature. The fitting of K_ (20) and hydraulic load on the whole a power regression exponential regression has higher Accuracy. Considering the water temperature and hydraulic load factors, the prediction of the first order dynamic model has high accuracy and reliability. Enhanced TN removal efficiency (water temperature is less than 19.5 degrees centigrade) and TP removal efficiency (water temperature is greater than 19.5 degrees C) can effectively improve the overall water intake and hydraulic load of HVFB.

【作者单位】：东南大学能源与环境学院;
【基金】：“十二五”国家科技支撑计划资助项目(2013BAJ10B13)
【分类号】：X703
【正文快照】： 水生植物滤床(aquatic plant filter bed,APFB)作为控制点源与非点源污染的一种新型生态技术[1 2],正受到人们的广泛关注.目前,APFB已用于城市暴雨径流[3]、河水[4]、冶炼厂废水[5]、水产养殖尾水[6]、农业废水[7]等的处理研究.APFB是由水生植物、水生动物及微生物构成的生态

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