新型异养细菌不动杆菌属H36的好氧反硝化作用与生物矿化作用
Aerobic denitrification and biomineralization by a novel heterotrophic bacterium, Acinetobacter sp. H36.
作者信息
Su Jun Feng, Shi Jing Xin, Ma Fang
机构信息
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; State Key Laboratory of Urban Water Resource and Environment, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
出版信息
Mar Pollut Bull. 2017 Mar 15;116(1-2):209-215. doi: 10.1016/j.marpolbul.2017.01.014. Epub 2017 Jan 8.
A novel aerobic denitrification and biomineralization strain H36 was isolated from the Qu Jiang artificial lake. Based on phylogenetic characteristics, the isolated strain was identified as Acinetobacter species. Strain H36 was confirmed to have the ability to perform simultaneous denitrification and biomineralization. Results showed the strain H36 had the capability to completely reduce 96.29% of NO-N and 78.59% of Ca over 112h under aerobic condition. Response surface methodology (RSM) analysis demonstrated the highest removal ratio of Ca was 74.24% with hardness concentration of 350mg/L, pH of 8.5, organic concentration of 0.75g/L and inoculum size of 15%. The highest removal ratio of nitrate was 77.00% with hardness concentration of 350mg/L, pH of 7.5, organic concentration of 0.75g/L and inoculum size of 10%. Besides, X-ray diffraction (XRD) analysis showed calcium carbonate could be formed in the process of biomineralization.
从曲江人工湖分离出一株新型好氧反硝化和生物矿化菌株H36。根据系统发育特征，该分离菌株被鉴定为不动杆菌属。菌株H36被证实具有同时进行反硝化和生物矿化的能力。结果表明，菌株H36在好氧条件下112小时内能够完全还原96.29%的NO-N和78.59%的Ca。响应面法（RSM）分析表明，当硬度浓度为350mg/L、pH为8.5、有机浓度为0.75g/L、接种量为15%时，Ca的最高去除率为74.24%。当硬度浓度为350mg/L、pH为7.5、有机浓度为0.75g/L、接种量为10%时，硝酸盐的最高去除率为77.00%。此外，X射线衍射（XRD）分析表明，生物矿化过程中可形成碳酸钙。
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