不同水生植物人工浮岛对生活污水的净化效果

摘要

[Objective] To study the purification effect of aquatic plant by an artificial floating island method on domestic sewage.[ Method] Cultivating aquatic plant by artificial floating island, through establishing simulated static sewage tank, the removal effects of willow vegeta-bles, aquatic yellow iris, calamus, aquatic canna on COD, ammonia nitrogen, TP were studied.[ Result] In sewage pond, willow vegetables grow best, all plants bloom;plant height of aquatic yellow iris, calamus changed obviously;aquatic canna grow worst, root growth was not obvi-ous, only a few plants flowering, with yellow leaves.For COD, the purification of plants was mainly in the reproductive stage, and for ammo-nia nitrogen and total phosphorus, it was mainly in the vegetative growth stage.The optimal order of four plants was as following, willow vege-tables, aquatic yellow iris(calamus), aquatic canna.[Conclusion] This study can benefit to the optimization of the aquatic plants and the fur-ther research on purification of surface water.%[目的]研究水生植物人工浮岛对生活污水水体的净化效果.[方法]利用人工浮岛技术种植水生植物,通过建立模拟的静态污水池,研究千屈菜、水生黄鸢尾、菖蒲、水生美人蕉对污水中化学需氧量(COD)、氨氮和总磷的净化效果.[结果]污水池中,千屈菜长势最好,所有植株开花;水生黄鸢尾和香蒲的株高变化明显,且不断有新芽冒出,长成完整的植株;水生美人蕉长势最差,根系生长不明显,只有少数植株开花,叶子呈黄色.4种植物对COD的净化主要在生殖生长阶段,对氨氮和总磷的净化主要在营养生长阶段.4种植物的优选顺序依次为千屈菜、水生黄鸢尾(菖蒲)、水生美人蕉.[结论]该研究可为优选水生植物和地面水的净化修复研究提供数据支持.