多级人工生态系统净化景观水体的研究

STUDY ON THE PURIFICATION OF LANDSCAPE WATER BY MULTI-STAGE ARTIFICIAL ECOSYSTEM

以景观水体为处理对象,构建了植物浮床生态箱-植物浮床生态箱-人工湿地-沉水植物生态箱多级人工生态系统,在系统中引入了多种植物、鱼类、螺蛳、虾等物种,且该系统在循环流方式下运行,系统的平均水力停留时间为2d,模拟景观水体4.2d被系统交换一次。试验结果表明,系统达到稳定运行之后,景观水体池中,DO平均值为4.93mg/L,NH4+-N平均值为0.673mg/L,TN平均值为17.303mg/L,TP平均值为0.703mg/L,COD平均值为20.967mg/L。

A planted floating ratfts tank-planted floating rails tank-constructed wetland-submerged plant tank system was built to treat landscape water. Several kinds of plant, fishes, snails, shrimps were cultured in the system, and water was circulated between the system and the landscape water tank, the retention time was 2 days, and the landscape water in the holding tank could be entirely exchanged by the system in 4.2 daysl Results showed that the average DO is 4.93 mg/L, the average NH4^＋-N is 0.673 mg/L, the average TN is 17.303 mg/L, the average TP is 0.703 mg/L, the average COD is 20.967 mg/L in the landscape water tank atter the system was stable.