Study On The Floating Bed Combination Biotechnology Restoring Eutrophic Lake Experiment

The ecological restoration technology as a new technology, with its good effect of less investment, operation and maintenance convenience etc, worldwide have developed rapidly. Ecological restoration technology can restore eutrophic water, and make water become beautiful.This paper for floating bed combination biotechnology restore eutrophic lake experiment research, the main contents include:(1) floating bed phytoremediation eutrophication test, (2) floating bed combination biotechnology restore eutrophication test, (3) the fluence of different velocity of flow and pH value to floating bed combination of biotechnology.Floating bed phytoremediation eutrophication test results show: generally speaking, Cyperus alternifolius for removal efficiency of CODcr and TP better than Vetiveria zizanioides. The Vetiveria zizanioides removal efficiency of TN, NH4+-N is better than Cyperus alternifolius. Vetiveria zizanioides uptake of N and P, and absorption rate are higher than the Cyperus alternifolius. From Vetiveria zizanioides in water for the removal rate of N, P, and it multi-channel approaches after harvest, Vetiveria zizanioides is a feasible pioneer reptoring plant for eutrophication.of Dianchi Lake.Floating bed combination biotechnology repair eutrophication test results show floating Vetiveria zizanioides bed, photosynthesis bacteria, artificial medium joint to restore Dianchi inner-lake, and the value of CODcr,TP,TN and NH4+-N fall to "surface water environment quality standards" classâ…¢. The lower velocity of lake can enhance the effection of floating bed combination of biotechnology. At the same time, the effect of restore, for the neutral pH value of floating bed combination of nutrients biotechnology water removal efficiency is highest. From the experiment results, floating bed combination biological technology is a valuable of eutrophication restore technology, broad application and development of prospects.