摘要
为探讨水力负荷、有机负荷和悬浮物固体负荷对垂直流人工湿地基质去除氮、磷效果的影响,采用了人工土柱模拟实验的方法,对不同数值的水力负荷、有机负荷(COD)和悬浮固体负荷单因素影响条件下垂直流人工湿地出水中TN、TP的浓度进行了监测。实验结果表明,在3种负荷单一因素影响条件下,垂直流人工湿地处理出水中TN、TP的浓度均随着负荷的增加而增加,即降低水力负荷、有机负荷、悬浮固体负荷均有利于降低垂直流人工湿地处理出水中TN、TP的浓度。当水力负荷为50 cm/d,垂直流人工湿地TP的去除率较高,达到71.52%;当有机负荷为50 g/(m2·d),TN的平均去除率较高,达到41.84%;当悬浮固体负荷为75 g/(m2·d),TP的平均去除率较高,达到92.13%。因此,在水力负荷实验中,当水力负荷为50 cm/d,垂直流人工湿地对氮、磷去除效果较佳;在悬浮固体实验中,当悬浮固体负荷为75 g/m2·d,垂直流人工湿地对氮、磷去除效果较好;在有机负荷实验中,当有机负荷(COD)为50 g/(m2·d),垂直流人工湿地对氮、磷去除效果较好。
Our aim was to explore the effects of the hydraulic loads,organic loads,and suspended-solids load on the removal of TN and TP. This was done in a simulated vertical flow constructed wetland,in which an artificial soil-column simulation experiment was performed to monitor the effluent indexes,( including TN and TP) under the condition of different hydraulic loads,organic loads,and suspended solids loads. The results obtained by single-factor influence tests showed that the TN and TP concentrations in the treated effluent increased with increased loading. Relatively low hydraulic,organic,and suspended-solids loads were conducive to reducing the concentrations of TN and TP in the effluent. When the hydraulic load was 50 cm / d,a higher TP removal rate could be achieved( average of 71. 52%). For the organic load of 50 g /( m^2·d),the average TN removal rate was 41. 84%; the SS load 75 g /( m^2·d),and the average TP removal rate was 92. 13%. Therefore,from the results of the single-factor influence experiment,the most promising conditions are hydraulic load of 50 cm /d,organic load of 50 g /( m^2·d),and suspended solid load of 75 g /( m^2·d).
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第2期637-642,共6页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(41071214
41271245)
广东省教育厅广东高校污水生态处理与修复工程技术研究中心建设项目(2012gczx A1004)
广东省科技厅农业科技创新团队项目(2012A020100003)
广东省水利科技创新项目(2015-15)
广州市科创委项目(2060404)
关键词
垂直流人工湿地
3种负荷
总氮
总磷
vertical flow constructed wetland
different loads
TN
TP