植物浮床-微生物对污染水体的修复作用

Remediation effects of plant floating bed-microorganism on contaminated water

在唐山市南湖公园进行了植物浮床-微生物修复富营养化水体的研究。研究结果表明:凤眼莲Eichhomia crassipes、美人蕉Canna indica Linn、鸢尾Iristectorum Maxim是较好的修复污染水体的植物,因为它们既有良好的修复效果又有良好的观赏价值。将人工填料悬挂于植物浮床下,形成植物和微生物相结合的修复系统,其修复效果明显好于单独植物修复技术,因此温度较高时用植物和微生物共同结合的生物修复技术修复水体污染;秋末冬初温度较低时,植物开始死亡,必须将植物收割,以免植物残体造成二次污染,此时用固定化氮循环细菌(INCB)和水体中原有微生物相结合的技术来修复水体的污染。应用这些技术经过为期3a的修复试验,南湖公园的水体由地表水劣Ⅴ类恢复到了Ⅲ类标准,基本解决了南湖公园水体的污染问题。

Study on remediation of contaminated water by plant floating bed-microorganism was carried in Nanhu Park of Tangshan city. The results obtained from research are summarized as follows： It is discoved that Eichhomia crassipes, Canna indica Linn and Iris tectorum Maxim are the preferable plants to remedy contaminated water because they not only can purify contaminated water but also they are ornamental. The artifical fillers are hung under the plant floating bed then the remedial system combined by plant and microorganism came into being. The remedial effectiveness of the system was visibly better than that of the phytoremediation alone. So when the temperature is higher the remedial system combined by plant and microorganism is the preferable remedial technique to remedy contaminated water. In autumnal end and winterly outset, the temperature is lower, the plants begin to fade and die, and the plant must be harvested lest the relict of plant should contaminate water again. At the same time the technique combined by immobilized nitrogen cycling bacteria （INCB） and microorganism which already existed in the water was used to remedy contaminated water. Using these techniques to experimentalize in Nanhu Park of Tangshan city for three years the water quality of Nanhu Park came from less V class of the surface water standard back to III class. The pollution of Nanhu Park of was resolved basically.