三种水生植物对养殖废水中氨氮的净化效果

Effects of Three Aquatic Plants on the Removal of NH_3-N in Livestock Breeding Wastewater

为了解3种常见水生植物对养殖废水中氨氮（NH_3-N）的去除能力,通过模拟试验研究了芦苇（Phragmites australis）、水葫芦（Eichhornia crassipes）、蕹菜（Ipomoea aquatica）对养殖废水中氨氮的净化效果。结果表明,3种供试水生植物对养殖废水中氨氮的净化能力大小为芦苇-水葫芦组合〉芦苇-蕹菜组合〉水葫芦〉蕹菜〉芦苇。在处理15 d后,供试的3种水生植物对养殖废水中氨氮的净化效率为44.0%～76.5%,而对照组为36%～45%,供试水生植物对养殖废水中氨氮有较强的净化能力。

In order to know the ability of three common aquatic plants, namely,Phragmites australis,Eichhornia crassipes and Ipomoea aquatica to remove NH_3-N from livestock wastewater,a stimulated experiment had been done to make a systematic study on their removal and purification of livestock breeding wastewater. The results showed that these three experimental aquatic plants had great removal ability to NH_3-N in livestock breeding wastewater. The ability was arranged as follow ：Combination of P. australis and E. crassipescombination of P. australis and I. aquatica P. australis I. aquatica P. australis. After15 days of this experiment process,the removal rate of NH_3-N ranged from 44.0% to 76.5%,while the removal rate in control blank was between 36% and 45%, which showed that these three experimental aquatic plants had great ability of removing and purifying NH_3-N in livestock breeding wastewater.