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首页> 外文期刊>Journal of Environmental Management >Dynamics of denitrification performance and denitrifying community under high-dose acute oxytetracycline exposure and various biorecovery strategies in polycaprolactone-supported solid-phase denitrification
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Dynamics of denitrification performance and denitrifying community under high-dose acute oxytetracycline exposure and various biorecovery strategies in polycaprolactone-supported solid-phase denitrification

机译：高剂量急性氧化含量暴露下脱氮性能和脱氮群落的动态及多己内酯支持固相脱氮中的各种生物再生策略

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摘要

Solid-phase denitrification (SPD) is a promising technology for nitrate-rich water purification. This study aimed to examine the variation in denitrification performance and denitrifying community under high-dose acute oxytetracycline (OTC) exposure and various biorecovery strategies. The denitrification performance was impaired significantly after one-day OTC shock at 50 mg L~(-1) in a continuous-flow SPD system supported by a polycaprolactone (PCL) carrier but could rapidly recover without the addition of OTC. When 50 mg L~(-1) OTC stress was applied for a longer time in the batch tests, a natural recovery period of more than 20 days was required to reach more than 95% nitrate reduction. Under the same conditions, the addition of both mature biofilm-attached PCL carrier and fresh biofilm-free PCL carrier significantly shortened the recovery time for efficient nitrate reduction, mainly due to the increase in organic availability from the PCL carriers. However, the composition of the microbial community notably changed due to the effects of OTC according to high-throughput sequencing and metagenomic analysis. Genes encoding NAR and NIR were much more sensitive than those encoding NOR and NOS to OTC shock. Tetracycline resistance gene (TRG) enrichment was 15.86% higher in the biofilm that experienced short-term OTC shock than in the control biofilm in the continuous-flow SPD system.
机译：固相脱氮（SPD）是富含硝酸盐的水净化的有希望的技术。本研究旨在检测高剂量急性氧化素（OTC）暴露和各种生物再生策略下的脱硝性能和反硝化群落的变化。在由多己内酯（PCL）载体支撑的连续流动SPD系统中，在50 mg L〜（-1）下的一日OTC冲击后，脱氮性能显着损害，但在不添加OTC的情况下可以快速恢复。当在分批测试中施加50mg L〜（-1）OTC应激时，需要超过20天的自然恢复期达到95％的硝酸盐还原。在相同的条件下，添加成熟的生物膜附着的PCL载体和新鲜的生物膜无pCL载体显着缩短了恢复时间，以便有效地减少硝酸盐，主要是由于PCL载体的有机可用性的增加。然而，由于OTC的影响，微生物群落的组成显着改变了根据高通量测序和代理分析。编码NAR和NIR的基因比编码和OTC休克的编码和NOS更敏感。生物膜中的四环素抗性基因（Trg）富集在持续的短期OTC冲击比连续流动SPD系统中的对照生物膜中的短期OTC震动更高。

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  • 来源
    《Journal of Environmental Management》 |2021年第1期|111763.1-111763.10|共10页
  • 作者

    Hui Yu; Xin Ye; Lijuan Feng; Jingyi Yang; Zeyu Lan; Chengzhe Ren; Wenzhuo Zhu; Guangfeng Yang; iaheng Zhou;

  • 作者单位

    Department of Environmental Science and Engineering Zhejiang Ocean University Zhoushan 316022 People's Republic of China;

    Department of Environmental Science and Engineering Zhejiang Ocean University Zhoushan 316022 People's Republic of China;

    Department of Environmental Science and Engineering Zhejiang Ocean University Zhoushan 316022 People's Republic of China;

    Department of Environmental Science and Engineering Zhejiang Ocean University Zhoushan 316022 People's Republic of China;

    Department of Environmental Science and Engineering Zhejiang Ocean University Zhoushan 316022 People's Republic of China;

    Department of Environmental Science and Engineering Zhejiang Ocean University Zhoushan 316022 People's Republic of China;

    Department of Environmental Science and Engineering Zhejiang Ocean University Zhoushan 316022 People's Republic of China;

    Department of Environmental Science and Engineering Zhejiang Ocean University Zhoushan 316022 People's Republic of China;

    College of Civil Engineering and Architecture Zhejiang University of Technology Hangzhou 310014 PR China;

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

    Solid-phase denitrification (SPD); Oxytetracycline (OTC); Microbial community; Denitrifiers; Denitrification genes;

    机译：固相脱氮（SPD）;氧赤素（OTC）;微生物群落;脱氮剂;脱氮基因;

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