Experimental Study On New Encological Floating Island For Lake Water Purification

Now our country has been seriously short of water resource,which has threaten the development of economy,society and the technology.The control of water pollution is imminent.Artificial floating island is one kind of water purification system which belongs to ecological restore technology,and its carrier is able to float on the water and not easily dispersed on which we can plant kinds of aquatic plants that is suitable to grow on the water. Artificial floating island makes use of the strong root of plants to absorb,enrich and degrade the pollutants in the water,at the same time,the strong root system provide a good living environment and habitat.The microbes in the root and aquatic plants correlate to restore synergies and achieve the goal of purifying sewerage. Wind-solar hybrid electricity technology makes use of inexhaustible renewable energy such as wind power and solar energy,to form a wind-solar hybrid function system.It converts solar energy into electricity by panels,at the same time wind energy into electricity by turbine,which combines wind energy and solar energy to produce electricity.The article is based on the technology of artificial floating island,and combines the technology of wind-solar hybrid electricity, to deal with the imitate sewerage of Qingnian Lake in Liaoning Province.In this article we discussed in different conditions,canna’s effect on purifying pollutant water.The main conclusions include:in the expiriment of canna artificial floating island,make the room temperature at 25℃, the maximum removal rate of TN and TP can reach 68.8% and 66.59%,which initial concentration of TN and TP is 17.69 mg/L and 1.35 mg/L.As the extention of hydraulic retention time,the concentration of TN\TP and COD in the water has been gradually reduced.The average removal rate of TN increased from 23.82% to 30.41%,the average removal rate of TP increased from 28.57% to 50.29%;When the temperature of water is within the scope of 17～29℃,as the temperature increases,the removal rate of TN and TP gradually increases.When the temperature of the water is within the scope of 29～35℃, the removal rate of TN and TP decreases with time,and the match temperature is 29℃.In contract of the purified datas from canna and hyacinth,we can conclude that the results are the same.In the study of new-type ecological floating island,cystosepiment of 2 centimeter is more stable than that of 6 centimeter,and more appliable for engineering.The main conclusions are:After charged 31 days,wind-solar hybrid system designed produces 1788.33J heat which can be able to support a 20W pump to operate 88h and 85W pump to operate 0.33h in all.