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首页> 外文期刊>Chemosphere >A modified two-point titration method for the determination of volatile fatty acids in anaerobic systems
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A modified two-point titration method for the determination of volatile fatty acids in anaerobic systems

机译：改进的两点滴定法测定厌氧系统中的挥发性脂肪酸

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摘要

The volatile fatty acids (VFA) concentration plays important roles in the rapid start-up and stable operation of anaerobic reactors. It's essential to develop a simple and accurate method to monitor the VFA concentration in the anaerobic systems. In present work, a modified two-point titration method was developed to determine the VFA concentration. The results show that VFA concentration in standard solutions estimated by the titration method coincided well with that measured by gas chromatograph, where all relative errors were lower than 5.5%. Compared with the phosphate, ammonium and sulfide subsystems, the effect of bicarbonate on the accuracy of the developed method was relatively significant. When the bicarbonate concentration varied from 0 to 8 mmol/L, the relative errors increased from 1.2% to 30% for VFA concentration at 1 mmol/L, but were within 2.0% for that at 5 mmol/L. In addition, the VFA composition affected the accuracy of the titration method to some extent. This developed titration method was further proved to be effective with practical effluents from a lab-scale anaerobic reactor under organic shock loadings and an unstable full-scale anaerobic reactor. (C) 2018 Elsevier Ltd. All rights reserved.
机译：挥发性脂肪酸（VFA）的浓度在厌氧反应器的快速启动和稳定运行中起着重要作用。开发一种简单而准确的方法来监测厌氧系统中VFA的浓度至关重要。在目前的工作中，开发了一种改进的两点滴定法以确定VFA浓度。结果表明，用滴定法估算的标准溶液中的VFA浓度与气相色谱仪测得的VFA浓度吻合得很好，所有相对误差均低于5.5％。与磷酸盐，铵和硫化物子系统相比，碳酸氢盐对所开发方法准确性的影响相对显着。当碳酸氢盐浓度在0至8 mmol / L之间变化时，VFA浓度在1 mmol / L时相对误差从1.2％增加到30％，但在5 mmol / L时相对误差在2.0％以内。另外，VFA组成在一定程度上影响了滴定方法的准确性。进一步证明了这种改进的滴定方法对实验室规模的厌氧反应器中的实际废水在有机冲击负荷和不稳定的全规模厌氧反应器中的排放是有效的。 （C）2018 Elsevier Ltd.保留所有权利。

著录项

  • 来源
    《Chemosphere》 |2018年第8期|251-256|共6页
  • 作者

    Mu Zhe-Xuan; He Chuan-Shu; Jiang Jian-Kai; Zhang Jie; Yang Hou-Yun; Mu Yang;

  • 作者单位

    Univ Sci & Technol China, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Dept Chem, CAS Key Lab Urban Pollutant Convers, Hefei 230026, Anhui, Peoples R China;

    Univ Sci & Technol China, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Dept Chem, CAS Key Lab Urban Pollutant Convers, Hefei 230026, Anhui, Peoples R China;

    Univ Sci & Technol China, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Dept Chem, CAS Key Lab Urban Pollutant Convers, Hefei 230026, Anhui, Peoples R China;

    Univ Sci & Technol China, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Dept Chem, CAS Key Lab Urban Pollutant Convers, Hefei 230026, Anhui, Peoples R China;

    Univ Sci & Technol China, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Dept Chem, CAS Key Lab Urban Pollutant Convers, Hefei 230026, Anhui, Peoples R China;

    Univ Sci & Technol China, Collaborat Innovat Ctr Suzhou Nano Sci & Technol, Dept Chem, CAS Key Lab Urban Pollutant Convers, Hefei 230026, Anhui, Peoples R China;

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

    Volatile fatty acids; Two-point titration; Anaerobic digestion; Weak acid;

    机译：挥发性脂肪酸;两点滴定;厌氧消化;弱酸;

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