Canna indica and Acorus calamus Ecological Floating Beds for Purification of Micro-polluted Source Water

Canna indica and Acorus calamus ecological floating beds were used to purify micro-polluted source water.When the influent TN,TP,CODMn and DO are 0.91 to 1.17 mg/L,0.12 to 0.18 mg/L,5.48 to 9.36 mg/L and 3.6 to 6.1 mg/L,respectively,the effluent purified by the two floating beds can satisfy GB 3838-2002.The ecological floating beds planted with Canna indica and Acorus calamus exhibit average removal efficiencies of 42.5% and 36.2% for TN,48.1% and 44.2% for TP,42.3% and 36.3% for CODMn,respectively.Canna indica has better treatment performance than Acorus calamus.The ecological floating bed has a significant purification effect,and therefore can be applied to treat micro-polluted source water.