摘要
构建复合垂直流人工湿地系统处理村镇污水,获得了不同流程、水力负荷、C/N条件下湿地系统对污水TN的净化效果数据,并进行分析。利用响应面分析法与遗传优化算法对主要工艺参数进行优化设计,找到正交试验以外的最优点和最差点。结果表明,复合垂直流人工湿地TN去除率随流程的增加呈上升趋势,TN主要在下行池中去除;随水力负荷增加,TN去除率呈现下降趋势;在所研究的范围内,C/N为15.00时TN去除效果最佳。基于正交试验设计的响应面回归方程,可作为垂直流人工湿地的TN去除率计算函数,相对误差基本控制在10%以内;使用遗传算法对响应面回归方程进行全局优化分析,对不同植物床湿地的最优点和最差点进行对比分析,这些点与湿地种植的植物相关关系不大,不同植物床湿地呈现相似的参数条件。
The integrated vertical-flow constructed wetland （IVCW） was established to treat village wastewater. The TN removal efficiency of IVCW operated under different aqueous flow distance, hydraulic loading and C/N was obtained and analyzed. Response surface methodology （RSM） was utilized to explore the main parameters in- fluencing TN removal efficiency of IVCW. The results indicated that TN removal efficiency was increased with in- creasing the flow distance,and most of TN was removed in down-flow system;the removal rate of TN decreased with the increasing of hydraulic loading. The optimal C/N for TN removal was 15.00. The orthogonal analysis based re- sponse surface model could be used for calculating TN removal rate of IVCW, the relative error was less than 10%. Optimization analysis of RSM base on genetic algorithm can get the optimal and worst point for TN removal. The opti- mal and worst point of TN removal was uncorrelated with plant of wetland, the wetland with different plant bed showed similar parameters condition.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2014年第2期27-31,共5页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.51169006)
江西省教育厅科技项目(No.GJJ12313)
江西省道路与铁道工程重点实验室资助项目
关键词
响应面法
复合垂直流人工湿地
脱氮
参数优化
response surface methodology
integrated vertical-flow constructed wetland
denitrifieation
parametersoptimization
