Yan Lu, Wang Shi-He, Zhong Qiu-Shuang, Huang Juan, Liu Yang, Wang Feng
Department of Municipal Engineering, Southeast University, Nanjing 210096, China.
Huan Jing Ke Xue. 2007 Apr;28(4):736-41.
Aim at the low dissolved oxygen concentration and nitrogen removing efficiency in constructed wetlands, the running parameters of aeration measure, influence on plants and bacteria, the dissolved oxygen concentration and purifying efficiency after aeration were studied. The results show that aeration should be run in the forepart of wetland. The best gas-flow ratio is 6. Continuous aeration is adopted. The influence of aeration on plants in wetlands is inconspicuous. The quantity of nitrifying bacteria and denitrifying bacteria are increased. Aeration improves the oxygen condition, which is under 0.6 mg/L before aeration but over 1 mg/L after aeration. The purifying efficiency of wetlands is improved, removing efficiency of organic matter increases 10%, and removing efficiency of total nitrogen is higher than 60%. So aeration has the value of research and application.
针对人工湿地溶解氧浓度低和脱氮效率问题，研究了曝气措施的运行参数、对植物和细菌的影响、曝气后的溶解氧浓度及净化效率。结果表明，曝气应在湿地前段运行。最佳气水比为6。采用连续曝气。曝气对湿地植物的影响不明显。硝化细菌和反硝化细菌数量增加。曝气改善了氧气条件，曝气前溶解氧浓度低于0.6mg/L，曝气后高于1mg/L。湿地的净化效率提高，有机物去除效率提高10%，总氮去除效率高于60%。因此，曝气具有研究和应用价值。
