Study On Eutrophic Water Purification By Ecological Floating Bed

Water is the unreplacement natural resource in human's manufacture and living process, which is the source of human's life. However, water shortage and water pollution are becoming increasingly prominent, which eutrophication of water has become a global environmental problems. Due to ecological floating bed technology has environmental, economic, efficient, no secondary pollution, and consistent with sustainable development, etc. It is currently widely used in the eutrophic water purification restoration.The main contents included:studied the removal effect of Caohai Lake during improved floating bed and traditional floating bed; studied the removal rate of Caohai Lake by ecological floating bed during elastic packing and combined packing; studied the removal effect of Caohai Lake by ecological floating bed during the summer and winter. The main conclusions were summarized as below:(1) Improved purification of the floating bed was better than the traditional floating bed. The removal rate of CODcr, TN, TP in the improved floating bed can reach to 86.4%,87.4% and 94.2%, which were 8.0% of CODcr,12.2% of TN,13.0% of TP higher than that in the traditional floating bed system after 25th days in motion. The results demonstrated that the Hydrilla verticillata played an important role in the improved floating bed water treatment system.The improved floating bed was effective and reasonable for the purification of Caohai Lake water, which had great value in application and significant meaning in practice.(2) The results showed that there was no significant difference removal effect of CODcr, TN on two groups of floating bed, but the hanged floating with combined packing for the removal effect of TP in Caohai Lake was better than the hanged floating with elastic packing. Therefore, the combined packing was more suitable than the elastic packing in the Dian chi lake water purification technology.(3) The experimental of seasonal floating bed proved that summer floating bed treatment of water was better than the floating bed in winter. As the plants were the main purification of bioremediation technology in floating bed technology, we should make full use of the seasonal rule of plants to improved purification efficiency.