Study on Running Characteristics of Aerating Subsurface Flow Wetlands
强化供氧条件下潜流型人工湿地运行特性

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 by experiments. 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 measure improves the oxygen condition, which is under 0.6mg/L before aeration but over 1mg/L after aeration. The purifying efficiency of wetlands is improved, removing efficiency of organic matter increase 10%, and removing efficiency of total nitrogen is higher than 60%. So aeration measure has the value of research and application.