处理生活污水的植物品种的筛选

以小型碎石床人工湿地生态系统和无土栽培2种方法，模拟研究了广东园林绿化中常用的27种植物对生活污水中氮、磷、COD的降解能力，表明野芋头、花叶万年青、象草、姜花、绿公主、富贵竹、再力花、大花叶万年青、芦苇、花芦苇、美人蕉、文殊兰、水芋头、风车草、红草、蜘蛛兰、千手观音、水葱和花蝴蝶等18种植物，可以作为人工湿地生态系统选种植物，从而扩大了可选植物品种范围，配合适当，可达到美化环境和净化污水2种功能，可适用于面源性水污染的治理。象草的研究表明，它是一种既有强污水降解能力又能作饲料的品种，适用于畜牧场的水污染治理。

Study on the screening of plants for sewage treatment

Two simulation of soil-free euhivation and small gravel-bed constructed wetland were carried out to study the abilities of 27 kinds of plants to remove nitrogen, phosphor and COD in sewage. Results showed that 18 plants including Alocasia odora, Dieffenbachia picta schott, Elephantgrass, Coronarious gingerlily, Philodendron Spp. ,Dracaena anderiana var. virens, Zaili flower,Big dieffenbachia picta schott, Phragmites australis communis trin , Flower bulrush, Canna chinenesis W. , Crinum asiaticum L. var. sinicum baker, Calla palustris Linn, Cyperus altemifolius L., Alternanthera versicolor regel, Spiderorchis, Qianshouguanyin, Seripus validus and Syngouium podophyllum were suitable for planting on the constructed wetland. These plants not only depurated sewage but also beautified the environment. It could be used in non-point source sewage treatment. The research of the Elephantgrass shows that it is a species with high capacity of sewage treatment and it can be used as forage. So Elephantgrass is especially suitable for sewage treatment of stock farm.