Denitrification characteristics of a marine origin psychrophilic aerobic denitrifying bacterium

查看全文 作　　者：Haiyan Zheng Ying Liu Guangdong Sun Xiyan Gao Qingling Zhang Zhipei [1]Liu

机构地区：[1]State Key Laboratory of Microbial Resources,Institute of Microbiology,Chinese Academy of Sciences,Beijing 100101,China.

出　　处：《Journal of Environmental Sciences》索引2011年第23卷第11期,共6页

基　　金：supported by the Knowledge Innova-tion Program of the Chinese Academy of Sciences(No.KJCX2-YW-L08) 摘　　要：A psychrophilic aerobic denitrifying bacterium,strain S1-1,was isolated from a biological aerated filter conducted for treatment of recirculating water in a marine aquaculture system.Strain S1-1 was preliminarily identified as Psychrobacter sp.based on the analysis of its 16S rRNA gene sequence,which showed 100% sequence similarity to that of Psychrobacter sp.TSBY-70.Strain S1-1 grew well either in high nitrate or high nitrite conditions with a removal of 100% nitrate or 63.50% nitrite,and the total nitrogen removal rates could reach to 46.48% and 31.89%,respectively.The results indicated that nitrate was mainly reduced in its logarithmic growth phase with a very low leve1 accumulation of nitrite,suggesting that the aerobic denitrification process of strain S1-1 occurred mainly in this phase.The GC-MS results showed that N 2 O was formed as the major intermediate during the aerobic denitrifying process of strain S1-1.Finally,factors affecting the growth of strain S1-1 and its aerobic denitrifying ability were also investigated.Results showed that the optimum aerobic denitrification conditions for strain S1-1 were sodium succinate as carbon source,C/N ratio15,salinity 10 g/L NaCl,incubation temperature 20°C and initial pH 6.5. 关键词：反硝化细菌好氧海洋起源 RRNA基因序列亚硝酸盐反硝化过程特性脱氮

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Denitrification characteristics of a marine origin psychrophilic aerobic denitrifying bacterium

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