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首页> 外文期刊>Water Research >Effect of microbial activity and microbial community structure on the formation of dissolved organic nitrogen (DON) and bioavailable DON driven by low temperatures
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Effect of microbial activity and microbial community structure on the formation of dissolved organic nitrogen (DON) and bioavailable DON driven by low temperatures

机译：微生物活性和微生物群落结构对低温驱动的溶解有机氮（Don）和生物可利用的影响

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摘要

Dissolved organic nitrogen (DON) formed by microbial metabolism in wastewater treatment processes adversely impacts wastewater reuse and receiving waters quality, and microbial metabolism is greatly influenced by temperatures. However, little is known about the effect of microorganisms on DON and bioavailable DON (ABDON) formation under low temperatures. In this study, six reactors were operated at low (8 degrees C and 15 degrees C) and room (25 degrees C) temperatures to evaluate the relationship between microbial activity, microbial communities, and DON and ABDON. Results showed that DON and ABDON concentrations significantly increased at low temperatures (p 0.05, t-test). DON formation was significantly correlated to microbial activity only, with adenosine triphosphate (negative, r = -0.64) and polysaccharide (positive, r = 0.61) as key indicators; however, ABDON formation was influenced by both microbial activity (polysaccharide triphenyltetrazolium chloride-dehydrogenases adenosine triphosphate) and microbial community structure. Short-term tests using the biomass from six reactors were performed at room temperature to further validate the relationship. The distinct differences between these results provide a basis for different strategies on reducing effluent DON and ABDON under low temperatures. (C) 2019 Published by Elsevier Ltd.
机译：废水处理过程中微生物代谢形成的溶解有机氮（DON）对废水再利用和接受水质产生不利影响，并且微生物代谢受到温度的大大影响。然而，关于在低温下对唐和生物可利用的唐（ABDON）形成的微生物的影响很少。在该研究中，在低（8摄氏度和15摄氏度）和室（25摄氏度）温度下操作六个反应器，以评估微生物活性，微生物群落和DON和ABDON之间的关系。结果表明，在低温下唐和ABDON浓度明显增加（P <0.05，T检验）。仅与微生物活性显着相关，腺苷三磷酸（阴性，r = -0.64）和多糖（阳性，r = 0.61）作为关键指标;然而，ABDON形成受微生物活性（多糖>三苯基四氯铵 - 脱氢酶>腺苷三磷酸）和微生物群落结构的影响。使用来自六个反应器的生物质的短期试验在室温下进行，以进一步验证关系。这些结果之间的明显差异为在低温下减少流出物唐和ABDON的不同策略提供了基础。 （c）2019年由elestvier有限公司发布

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  • 来源
    《Water Research》 |2019年第1期|397-405|共9页
  • 作者

    Liao Kewei; Hu Haidong; Ma Sijia; Ren Hongqiang;

  • 作者单位

    Nanjing Univ Sch Environm State Key Lab Pollut Control & Resource Reuse Nanjing 210023 Jiangsu Peoples R China;

    Nanjing Univ Sch Environm State Key Lab Pollut Control & Resource Reuse Nanjing 210023 Jiangsu Peoples R China;

    Nanjing Univ Sch Environm State Key Lab Pollut Control & Resource Reuse Nanjing 210023 Jiangsu Peoples R China;

    Nanjing Univ Sch Environm State Key Lab Pollut Control & Resource Reuse Nanjing 210023 Jiangsu Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Temperature; Dissolved organic nitrogen (DON); Microbial activity; Microbial communities; Wastewater treatment;

    机译：温度;溶解有机氮（Don）;微生物活动;微生物社区;废水处理;

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