直接产电型垂直流人工湿地微污染水源水处理试验研究

Study on Vertical Flow Constructed Wetland Embedded with Fuel Cell Treating Micro-polluted Source Water

基于生物电化学原理,首次构建直接产电型垂直流人工湿地新装置,进行微污染水源水处理试验,考察其污水净化效果和生物产电特性。结果表明:1)新装置外接电阻为6 000Ω时,能达到777mV的最大输出电压,最大功率密度为8.05mW/m2;2)微污染水源水净化效果好,尤其有较强的脱氮能力,当进水TN平均3.3mg/L,TN去除率最高达到97.35%,平均达到70%;3)试验期间人工湿地植物生长正常。

Based on the bio-electrochemical theory,vertical flow constructed wetland embedded with fuel cell new device was built to test the micro-polluted source water,examine the effect of water purification and electrical characteristics of biological products.The results show that： 1）when the external resistance is 6 000 Ω,the maximum output voltage achieved 777 mV,the maximum power density of 8.05 mW/m2.2）The system exhibited effective removal of COD,nitrates from wastewater,it has a strong ability in denitrogenation with the maximum removal efficiency of 97.35% and average removal efficiency of 70% when the influent average TN was 3.3 mg/L.3）It does not affect the normal growth of plants as well.