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中国农学通报

中国农学通报 ›› 2014, Vol. 30 ›› Issue (31): 219-223.doi: 10.11924/j.issn.1000-6850.2014-0621

• 林学 园艺 园林 • 上一篇    下一篇

水力停留时间对人工湿地运行的影响

徐丽   

  1. 湖南农业大学
  • 收稿日期:2014-03-10 修回日期:2014-03-10 接受日期:2014-09-17 出版日期:2014-11-20 发布日期:2014-11-20
  • 通讯作者: 徐丽
  • 基金资助:
    湖南省财政厅科技专项(XHH2011-1394)

Impact of Hydraulic Retention Time on Wetland Running

  • Received:2014-03-10 Revised:2014-03-10 Accepted:2014-09-17 Online:2014-11-20 Published:2014-11-20

摘要： 通过室内模拟水平潜流式人工湿地和水平均匀布水方式观察人工湿地出水水质，设置了4 个实验方案，分析其对COD、TN和TP 的去除效果，以确定最佳水力停留时间。结果表明：水力停留时间为3 天时湿地对COD、TN和TP的平均去除率分别是54.04%、65.83%和80.79%；当水力停留时间为2 天时湿地对COD、TN和TP的平均去除率分别是75.93%、74.97%和77.34%；当水力停留时间为1 天时人工湿地对COD、TN和TP的平均去除率分别是73.19%、56.20%和73.36%；当水力停留时间为0.5 天时人工湿地对COD、TN和TP 的平均去除率分别是46.46%、34.91%和47.04%。若只关注人工湿地出水水质，采用水力停留时间为2天时，可以保证其出水水质达到《地表水环境质量标准(GB 3838—2002)》Ⅴ类标准。

关键词: 化学形态, 化学形态

Abstract: A simulated horizontal subsurface-flowed constructed wetland was set up in laboratory to study the water quality out from the wetland in horizontal distribution uniformity condition. Four scenarios were set to analyze the removal efficiency of COD, TN and TP in order to determine the optimal hydraulic retention time (HRT). Results showed that the average removal rate of wetlands to COD, TN and TP was 54.04%, 65.83% and 80.79% when the HRT was 3 days; the average removal rate of wetlands to COD, TN and TP was 75.93%, 74.97% and 77.34% when the HRT was 2 days, the average removal of constructed wetlands to COD, TN and TP were 73.19%, 56.20% and 73.36% when HRT was 1 day; the average removal of constructed wetlands to COD, TN and TP was 46.46%, 34.91% and 47.04% when HRT was 0.5 day. If only concerning wetland water quality, the HRT of 2 days would guarantee effluent quality meet the standard Ⅴ class of‘Surface Water Quality Standard (GB 3838-2002)’.