海南地区垂直潜流人工湿地增加缓释碳源强化去除TN的性能研究

Study on the enhanced removal of TN in vertical constructed wetlands in Hainan province

在下向潜流人工湿地中增加一定比例的椰壳纤维素和花生壳作为缓释碳源,通过分别处理农村生活污水和污水处理厂一级B出水,对比含缓释碳源人工湿地和不含缓释碳源人工湿地对TN的处理效果,评估增加缓释碳源强化去除TN的性能。试验结果表明:垂直潜流人工湿地处理农村生活污水时基质中增加缓释碳源对TN的去除效果没有显著的提高,水力负荷为0.6m^3/(m^2·d)时,不加缓释碳源TN平均去除率为48.01%,加缓释碳源TN平均去除率为50.54%;垂直潜流人工湿地处理污水处理厂一级B出水时,基质中增加缓释碳源对TN的去除效果有一定的提高,与不增加缓释碳源相比,TN平均去除率由19.53%提升到了24.44%,TN的去除效果提升了25.14%。

Vertical constructed wetland adding a percentage of coconut fiber and peanut shells as a slow release carbon source. Through the treatment of rural domestic sewage and grade B effluent of sewage treatment plant, the treatment effect of constructed wetland on TN was compared, and the enhanced removal performance of TN by adding sustained release carbon source was evaluated.The experimental results showed that: when the vertical subsurface flow constructed wetland was used to treat rural domestic sewage, the removal effect of TN in the wetland with slow-release carbon source was not significantly improved. When the hydraulic load was 0.6m^3/(m^2·d), the average TN removal rate of wetlands without slow-release carbon source was 48.01%, and that of wetlands with slow-release carbon source was 50.54%. Vertical constructed wetland treatment wastewater of level B effuent, the wetland with increased slow-release carbon source has a certain improvement in TN removal effect, compared with the wetland without increased slow-release carbon source, the average removal rate of TN increased from 19.53% to 24.44%, TN removal effect increased by 25.14%.