Bioremediation Of Reservoir Polluted Sediment

In recent decades,people have done a lot of research for solving the problem of water eutrophication,with further research,people pay more and more attention to sediments in pollutant release and find the technology of control the release pollutants into the water.As the research focus abroad,bioremediation method has been universal concern,although there are already many successful examples, at present the application of bioremediation technology in China is not common,research is not penetrating. The domestic research and applications,for water sediment bioremediation research is still in its infancy.Many studies have showed that bioremediation technology has vast potential markets perspective and potential,it has incomparable advantages in comparison with the physical and chemical methods.Therefore, bioremediation of contaminated sediments is very meaningful.In the research,three high efficiency nitrifying bacteria and four high efficiency denitrifying bacteria were screened from the landscape water sediment of Tang Yu reservoir and Shi Bian Yu reservoir,we named them X4,X5,JX28,FX3,FX4,YFX3,YFX4.Ammonia nitrogen removal rate of JX28 has been up to 46% in 15℃,nitrate nitrogen removal rate of YFX3 and YFX4 has been up to 70%.According to the physiological-biochemical tests for FX3,FX4,YFX3,YFX4,they identified as Pseudomonas stutzeri.Under aerobic conditions,environmental factors which have a effect of the nitrogen removal for FX3,FX4,YFX3,YFX4 were been disccused, including C/N,pH,temperature.The result of research shows the best temperature for aerobic denitrifycation is about 25-35℃.When the PH increased to 8.5,nitrate nitrogen removal rate of FX3,YFX3,YFX4 exceed 65%.The C/N has a great influence for aerobic denitrifycation.When the C/N is about 6-9, nitrate nitrogen removal rate has been up to 50%.In the experiment, the nature of the ceramics,shale granules,vesuvianite,maifanitum and garnet were been disccused,and we choose the inorganic filler the first time.The research shows several filler on the adsorption amount of ammonia is different,the ceramics has the maximum adsorption capacity which exceed 1.8mg/L.By methylene blue test shows medium-pore volume of inorganic filler,explained to some extent that how developed the pore of the filler is. At last, we choose ceramics,shale granules to do the next experiment.Explained to some extent that how developed the pore of the filler is.By study the strains and filler,we finally decided to use the rate of FX3,YFX3,YFX4.By the practice experiment of hanging film and cover on the contaminated sediments,to restoration of biological effects.Results show that through bioremediation can prevent the pollution of sediments overlying the release of pollutants in water.Improve the water quality of overlying water.