铁铜内电解基质与曝气对人工湿地除污的影响

摘要

To investigate the pollutant removal efficiencies of Fe-Cu interior electrolytic substrates under different aeration conditions, surface flow of constructed wetland was selected. The pollutant removal efficiency of COD, TN,TP under different Fe-Cu interior electrolytic substrates (mass ratios 1:0,1:0.05,1:0.1,1:0.2) and aeration conditions (air-water ratios 3:1,6:1,9:1,12:1,15:1) were measured. Results showed that the pollutant removal efficiency of COD, TN and TP was higher with increased proportion of Cu. The pollutant removal efficiency of TP was higher with air-water ratio 9:1 compared to air-water ratios 3:1, 6:1,12:1 and 15:1. No signiifcant interactions between Fe-Cu interior electrolytic substrates and aeration conditions were found. The study indicated that when the air-water ratio was 9:1 and mass ratio of Fe-Cu interior electrolytic substrates was 1:0.2, respectively, providing a useful strategy for maximizing the pollutant removal efficiency of COD, TN,TP.%为探究不同铁铜内电解基质在不同曝气条件下对人工湿地污水的净化效果,构建表流人工湿地床,以研究4种铁铜内电解基质(质量比1:0、1:0.05、1:0.1、1:0.2)在不同曝气条件下(气水比3:1、6:1、9:1、12:1、15:1)对人工湿地污水的COD、TN、TP去除率的影响.结果表明:不同铁铜内电解基质对COD、TN、TP的去除效果有显著差异.随着内电解基质中铜比例的提高,COD、TN、TP的去除率均有升高的趋势.随着气水比的提高,TP去除率呈先升后降的趋势.铁铜内电解基质与曝气条件之间的交互作用对COD、TN、TP去除效果影响不显著.研究发现,当气水比为9:1时,铁铜内电解基质(质量比1:0.2)的净污效果最好.