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饮用水除氨氮功能菌株的筛选及降解特性

Keywords: 异养菌,氨氮,饮用水,低温

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Abstract:

从松花江原水中筛选出2株异养菌YX1和YX2,经生理生化及16SrDNA序列鉴定,YX1为微杆菌属(Microbacteriumsp.),YX2为不动杆菌属(Acinetobactersp.)。5℃菌株YX1的世代时间为3.03h,菌株YX2的世代时间为3.87h。应用生物增强活性炭技术研究了异养菌株YX1和YX2对氨氮的降解特征,结果表明,菌株经过3~4d的适应期后,在低温5℃对氨氮具有较强的降解能力,且环境条件影响菌株对氨氮的降解效果。菌株YX1和YX2在高溶解氧浓度下氨氮降解效果好,属于好氧细菌,降解氨氮的最适合温度为12~15℃,属于耐冷型中温菌,最适宜的pH为弱碱性(7.5~8.0),以乙酸盐为碳源时对氨氮降解能力最强,其次为葡萄糖>柠檬酸三钠>碳酸钙>甘油,以上结果可为低温水源水中氨氮的去除提供新的技术方法和理论依据。

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