春夏两季四种植物净化生活污水的静态试验研究

在春夏两季，分别开展为期30天的静态试验，以研究芦苇、黄菖蒲、美人蕉、香蒲四种湿地植物对富营养化生活污水的净化效果。试验结果表明：通过纵向比较，夏季时植物对TN、TP的净化效果优于春季。通过横向比较，春季时黄菖蒲和香蒲的净化能力较强；夏季时美人蕉的净化能力较强。在时间上，可将喜温植物与耐寒植物结合，以保证湿地系统的长年运行；在空间上，可将挺水植物与沉水植物结合，以保证湿地系统的处理效果。

Static Experiments on Purification of Domestic Sewage by Four Species of Plants in Spring and Summer

Similar static experiments had been done for 30 days in the spring and summer respectively to study the purification effect of domestic sewage by planting four species of wetland plant, i.e. , Phragrnites communis, Iris pseudoacorus, Canna inclica L and Typtm angustata. As a result, the purification effect for TN and TP by wetland plants in the summer is better than it in the spring. Iris pseudoacorus and Typha angustata are better than others in the spring, while Canna indica L is the best in the summer. Both the thermophilans plants and hardy plants should be planted to keep the operation of the wetland system all tear round and the submerged plants and the emerging plants should be planted in a same space to make the wetland system more effectively.