| in recent years,the control of nitrogen oxide pollution has attracted comprehensive attention, due to its well-known pollution.NOx in the fluet gas is mainly present in the form of NO and NO2. Essence of biological treatment is the use of microbial life activities will converted NOx to harmless inorganic cytoplasm and microorganisms. Denitrifying bacteria dissolve NOx can be divided purification of NO and NO2, the adsorption and biochemical effects.In general,the traditional denitrification proves has occurred under anaerobic conditions..however,the use of aerobic denitrifying bacteria to remove nitrogen oxides in the flue gas things should be considered be cause of the co-existence of oxygen.Microbiological method process equipment is simple, easy operation, low energy consumption, low running costs and no secondary pollution, which has allowed treatment of microbial nitrogen oxides in the gas as a new trend.and microbiological method has broad application.In order to remove nitrogen oxides in the flue gas using biological methods,this study was isolated an fheterotrophic nitrification- aerobic denitrifying bacteria from Activated sludge wastewater treatment plant,and according to the morphological,physiological and 16 Sr DNA sequence analysis to determine the strain,and by measuring the aerobic denitrifying bacteria efficiency at different factor conditions analyze their heterotrophic aerobic nitrification and denitrification.The strains isolated from activated sludge out of the named HFHV.16 Sr DNA sequence alignments strains and phylogenetic analysis showed:Strai was identified as Halomonas variabilis,and its registration number Gen Bank is AY204638.Colonies is light yellow brown,rod-shaped cell or short rod cell.It grew optimally p H 5.5-8.5 at 25-50 ℃.HFHV has good adaptability to various nitrogen sources, with heterotrophic nitrification.The removal of NO3--N was 95.6 % under optimum conditions. |
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