浮床植物系统对富营养化水体的净化效果

Study on the Purification Effects of Eutrophic Water Body in Floating-Bed Plant Systems

通过静态试验,研究空心菜、美人蕉、吊兰3种浮床植物系统对富营养化水体净化效果.结果表明,在水温为27~32℃,生长21 d条件下,空心菜和美人蕉生长良好,生物量大,而吊兰生长较差,生物量增加少.空心菜、美人蕉和吊兰对化学耗氧量（CODMn）的平均去除率分别为13.2%,11.7%和6.9%;对总磷的平均去除率分别为57.7%,66.4%和30.6%;对PO43--P的平均去除率分别为69.1%,82.0%和42.1%;对NH4＋-N的平均去除率分别为50.0%,42.8%和21.9%;对藻类的平均抑制率分别为55.1%,42.5%和13.6%.

The purification effect of eutriohic water body in floating-bed system with Ipomoea aquatica,Canna generalis and Spider plant were studied through static tests.Results show that Ipomoea aquatica and Canna generalis could grow well in the floating-bed plant system under the conditions of water temperature 27~32 ℃ and growth 21 d,but Spider plant could not grow well.The the average removal rate of CODMn by these three plants were 13.2%,11.7% and 6.9%,and that of TP,PO3-4-P,NH＋4-N and algae were 57.7%,66.4% and 30.6%,69.1%,82.0% and 42.1%,50.0%,42.8% and 21.9%,55.1%,42.5% and 13.6% respectively.Ipomoea aquatica and Canna generalis had good purification effects of eutrophic water body in the floating-bed system.