微曝气生态浮床净化入湖河口污染河水原位模型实验

针对污染河水黑臭缺氧、NH_4~+-N含量高等问题,研发了一种"漂浮载体悬挂弹性生物膜填料+水生植物并辅以人工微曝气系统"的微曝气生态浮床系统.通过原位模型实验,研究了其在大清河入湖河口对污染河水的净化效果,当水力负荷为1500mm/d时,对TN和NH_4~+-N的平均去除率分别为81.1%、91.3%,对TP的平均去除率为72.7%,对PO_4~(3-)-p的平均去除率为92.5%,对有机物亦有较强的去除能力;处理1m~3水需要的曝气费用约为0.007元.微曝气生态浮床系统整体运行稳定、去除效率高、能耗低,适合流水环境,可直接在污染河道和人湖河口区对污染河水进行自流净化.

In-situ model experiment on purification of polluted river water into lake based on micro-aerated ecological floating bed

Aiming at the problem of black-odor, oxygen deficiency and ammonia-nitrogen pollution of polluted rivers, a new type of ecological floating bed-micro-aerated ecological floating bed was developed, which combined biofilm packing, floating aquatic macrophyte and auxiliary aeration device. The purification efficiency of the polluted river water was studied by the model experiment in the outlet of Daqing River. The results showed when the hydraulic loading was 1500mm/d, the mean removal efficiencies of total nitrogen, ammonia nitrogen, total phosphorus and phosphate were 81.1%, 91.3%, 72.7% and 92.5%, respectively. Additionally, the floating bed showed better removal effect on organic matters. The cost of micro-aerated system to treat 1m~3 of polluted river water was only 0.007 Yuan. The micro-aerated ecological floating bed ran steadily, had a high efficiency of pollutants removal and low energy consumption. It was suitable for the environment of flowing water, which could be used in polluted river and estuary.