投放底栖动物强化水耕植物过滤法的净水效果

The water purification effect of hydroponic biofilter method by artificial putting in zoobenthos

在水耕植物过滤法净水系统中的植物栽培廊道中,通过投放2种底栖动物螺蛳和泥鳅延长食物链后,TN、TP、TOC、Chl.a的去除效果均比未投放底栖动物的廊道有所提高.投放螺蛳的效果最为显著,TN、TP、Chl.a的去除率增幅分别达54%、27%和26%,比较了不同廊道中底泥的硝化、反硝化潜力,投放螺蛳的廊道其反硝化潜力最大,为9.08×10-7g/(g·h),而硝化潜力最小,为3.65×10-6g/(g·h).除氮能力大幅增加的原因,是由于螺蛳的引入增加了物质在食物链营养级传递中的损耗,另一方面是由于螺蛳的存在提高了底泥的反硝化潜力.

The removal effect of TN, TP, TOC, Chl.a where enhanced some what through putting in two kinds of zoobenthos as Bellamya purificata and Misgurnus anguillicaudatus in plant cultivated channels of water purification system of hydroponic biofilter method （HBFM） compared with not putting in zoobenthos channel. The effect of putting in Bellamya purificata was most marked. The enhance range of removed rates of TN, TP, Chl.a increased 54%, 27% and 26% respectively. The nitrification and denitrification potential of sediment in different channels were compared quantitatively. The denitrification potential in channel with putting in Bellamya purificata was the greatest of 9.08×10^-7g/（g·h）, while the nitrification rate was the smallest of 3.65× 10^-6g/（g·h）. The cause of great range increase of TN removal ability was in one respect the matter wears increased in the transferring of food chain nutrition level from introducing Bellamya purificata and in other respect the sediment denitrification potential from the existence of Bellamya purificata increased.