内电解基质铁铜比与水力停留时间对人工湿地处理效果的影响

Effects of Interior Electrolytic Substrates Fe-Cu Ratio and Hydraulic Retention Time on Pollutant Removal Efficiency of Constructed Wetlands

选择不同铁铜质量比(1∶0、1∶0.05、1∶0.1和1∶0.2)的内电解基质构建表流型人工湿地,同时设定水力停留时间为1、2、3、4和5 h,研究2种影响因子对污水TP、CODCr和TN的处理效果。结果表明:不同铁铜比的内电解基质对TP的去除效果存在显著差异,对CODCr和TN的去除效果差异不显著。不同水力停留时间的净污效果也存在显著差异,水力停留时间越长,去污效率越高。不同内电解基质铁铜比与水力停留时间的交互作用对去除率影响不显著。

To investigate effects of interior electrolytic substrates Fe-Cu ratio and hydraulic retention time( HRT) on pollutant removal efficiencies of constructed wetlands,an experiment was carried out using surface flow constructed wetland beds different in interior electrolytic substrates Fe-Cu mass ratios( 1 ∶ 0,1 ∶ 0.05,1 ∶ 0.1 and 1 ∶ 0.2) and in hydraulic retention time( 1,2,3,4 and 5 h). Data of the experiment were analyzed using two-way analysis of variance( ANOVA)with Fe-Cu interior electrolytic and HRT as two factors. Results show that TP removal efficiency of the bed varied sharply with Fe-Cu ratio,but CODCrand TN removal efficiencies did not. Pollutant removal efficiencies varied with hydraulic retention time,too,and the longer the HRT,the higher the pollutant removal efficiency. However,no significant effect of interactions between Fe-Cu interior electrolytic and hydraulic retention time was observed.