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人工湿地用于污水深度处理的反应动力学
引用本文:付国楷,王敏,张智,周琪.人工湿地用于污水深度处理的反应动力学[J].土木建筑与环境工程,2012,34(4):111-117.
作者姓名:付国楷  王敏  张智  周琪
作者单位:1. 重庆大学三峡库区生态环境教育部重点实验室,重庆,400045
2. 同济大学污染控制与资源化研究国家重点实验室,上海,200092
基金项目:国家"十一五"科技重大专项
摘    要:比较3种不同形式人工湿地(潜流、表面流和组合流)对城市污水厂二级生物处理出水中污染物的去除效果,并采用一级反应动力学模型进行模拟.结果表明,潜流湿地对有机物、总氮、总磷的去除效率高于其它2种湿地,其标准温度下反应动力学常数( KA20)分别为0.29、0.20和0.28 m/d;表流湿地对氨氮的去除效率最高,其KA20值为0.12 m/d.温度变化对3种人工湿地中有机物和总磷去除的影响不明显,对氨氮和总氮的去除有明显影响,尤其对表面流湿地影响最为显著.3种人工湿地对污染物的去除效率均随着水力负荷的增大而显著下降,污染物的面积去除量将随着面积负荷的不断提高逐渐趋于定值,因此人工湿地宜在低负荷工况下运行.

关 键 词:人工湿地  污水处理  反应动力学

Reaction Kinetics of Three Types of Constructed Wetland for Advanced Domestic Wastewater Treatment
FU Guokai,WANG Min,ZHANG Zhi and ZHOU Qi.Reaction Kinetics of Three Types of Constructed Wetland for Advanced Domestic Wastewater Treatment[J].土木建筑与环境工程,2012,34(4):111-117.
Authors:FU Guokai  WANG Min  ZHANG Zhi and ZHOU Qi
Affiliation:Key Lab of Three Gorges Reservoir Region s Eco Environment, Ministry of Education, Chongqing University, Chongqing 400045, P. R. China;Key Lab of Three Gorges Reservoir Region s Eco Environment, Ministry of Education, Chongqing University, Chongqing 400045, P. R. China;Key Lab of Three Gorges Reservoir Region s Eco Environment, Ministry of Education, Chongqing University, Chongqing 400045, P. R. China;State Key Lab of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, P. R. China
Abstract:The removal efficiencies of different pollutants in subsurface flow constructed wetland (SSFW), surface flow constructed wetland (SFW) and combination flow constructed wetland(CFW) treating sewage plant effluent were comparatively analysed. The results were analyzed by using a reaction kinetics model. It is shown that COD, TN, TP are more effectively removed in SSFW than in other two types of wetland, and the kinetic constants are 0.29, 0.20, 0.28 m/d respectively. The SFW has higher removal rate on ammonia and the kinetic constant is 0.12 m/d. Temperature change greatly affects the kinetic constants of ammonia and total nitrogen removal reaction, whilst the influence on COD and TP are not significant. The pollutants removal efficiencies decrease greatly with the increase of hydraulic loading and areal loading. The increment of areal removal mass is reduced with the increase of areal loading in three types of wetland. It is strongly recommended that the constructed wetland be operated on low pollutants loading condition.
Keywords:constructed wetland  wastewater treatment  reaction kinetics
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