| 针对硝化菌抗盐机理的研究 |
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| 引用本文： | 屈晋云,刘波,万馥君,王铸. 针对硝化菌抗盐机理的研究[J]. 环境科学与技术, 2012, 0(9): 108-111 |
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| 作者姓名： | 屈晋云 刘波 万馥君 王铸 |
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| 作者单位： | 南京大学环境学院 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项(2009ZX07010-002-003.1) |
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| 摘 要： | 为研究盐度对硝化菌的影响,以及硝化菌对盐度的抵抗机理,以模拟皮革废水为处理对象,考察了硝化菌硝化作用过程中的脱氮效率,脱氮数率,pH值,溶解氧,以及硝化菌胞外聚合物的含量与成分变化。结果表明在盐度逐步提高的情况下,出水氨氮从几乎检测不出升高到80 mg/L左右,硝化菌脱氮效率下降明显,并且有一定的规律性。pH值先降后升,溶解氧随着时间推移逐渐升高,但是随着盐度提高规律性越来越不明显。硝化菌所产生的胞外聚合物随着盐度提高,胞外聚合物总量有所提高,其主要成分含量发生变化,即多糖所占比例从35.2%升高到63.6%,蛋白质所占比例从58.8%减少到30.9%,从而影响活性污泥的絮凝性,从机理方面来解释盐度对硝化菌硝化作用的影响。
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| 关 键 词： | 胞外聚合物(EPS) 皮革废水 盐度 硝化作用 聚焦光束反射测定法(FBRM) |
Research on Salt-tolerant Mechanism of Nitrification Bacteria |
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| QU Jin-yun,LIU Bo,WAN Fu-jun,WANG Zhu. Research on Salt-tolerant Mechanism of Nitrification Bacteria[J]. Environmental Science and Technology, 2012, 0(9): 108-111 |
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| Authors: | QU Jin-yun LIU Bo WAN Fu-jun WANG Zhu |
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| Affiliation: | (School of Environment,Nanjing University,Nanjing 210046,China) |
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| Abstract: | An experimental study was conducted to investigate the influence of salinity in wastewater on nitrifying bacteria with respect to their de-nitrification efficiency and rate.Wastewater samples containing salt were simulated tannery effluent prepared in the lab,in which changes of pH,DO and extracellular polymeric substances(EPS)of the de-nitrifying bacteria with the increases of salinity were studied.As salinity of the wastewater increased,so did EPS produced by the de-nitrifying bacteria,but EPS’s major ingredients changed with the increase of portion of polysaccharides and decrease of protein.As a result,increased salinity affected flocculation of the activated sludge. |
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| Keywords: | extracellular polymeric substances(EPS) tannery effluents salinity nitrification focused beam reflectance measurement |
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