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Does the Nitrification-Suppressed BOD_5 Test Make Sense?

机译：硝化抑制的BOD_5测试是否有意义？

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摘要

The presence of dissolved oxygen (DO) in a water body is critical for water quality and the support of aquatic life. Demands on DO via biochemical and chemical degradation of organic and inorganic pollutants are of great importance to water quality management. With this background, the measurement of biochemical oxygen demand (BOD) was identified as a good standard indicator of water quality over 100 years ago,1 with lower BOD levels reflecting higher levels of water quality. We argue that the standard BOD-measure-ment method, ISO 5815-1, is routinely underestimating the DO demand in a water body by employing routine suppression of oxygen demand from the nitrification process of converting ammonium to nitrate. Underestimation of the actual oxygen demand may subsequently cause systemic risk in environmental impact assessments. BOD is commonly measured using the ISO 5815 standard method: Water quality-Determination of biochemical oxygen demand after n days (BOD_n).2,3 This standard procedure can be applied to all waters having biochemical oxygen demands between 1 mg/L and 6000 mg/L~2 and involves dilution, seeding, and incubation of the water samples for 5 or 7 days in a completely filled and sealed bottle at 20 ℃ in the dark. The DO concentration (in mg/L) is determined before and after incubation, and the difference calculated is taken as the BOD concentration.
机译：水体中溶解氧（DO）的存在对于水质和维持水生生物至关重要。通过有机和无机污染物的生化和化学降解对溶解氧的需求对水质管理非常重要。在这种背景下，生化需氧量（BOD）的测量被认为是100年前水质的良好标准指标，1的BOD较低反映了较高的水质。我们认为，标准BOD测量方法ISO 5815-1通过采用常规抑制将铵转化为硝酸盐的硝化过程中的氧气需求量，经常低估了水体中的DO需求量。实际氧气需求的低估可能会在环境影响评估中导致系统性风险。 BOD通常使用ISO 5815标准方法进行测量：水质-n天后生化需氧量的测定（BOD_n）.2,3此标准程序可适用于生化需氧量在1 mg / L至6000 mg之间的所有水/ L〜2，涉及将水样稀释，接种和在完全充满密封的瓶子中于20℃黑暗中孵育5或7天。在孵育之前和之后确定DO浓度（以mg / L为单位），并将计算出的差异作为BOD浓度。

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  • 来源
    《Environmental Science & Technology》 |2020年第9期|5323-5324|共2页
  • 作者

    Changyu Liu; Clare Morrison; Jianbo Jia; Xiaolong Xu; Minchao Liu; Shanqing Zhang;

  • 作者单位

    School of Biotechnology and Health Sciences Wuyi University Jiangmen 529020 China;

    School of Environment and Science Gold Coast Campus Griffith University Southport Queensland 4222 Australia;

    School of Biotechnology and Health Sciences Wuyi University Jiangmen 529020 China State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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