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An improved titration model reducing over estimation of total volatile fatty acids in anaerobic digestion of energy crop, animal slurry and food waste

机译:一种改进的滴定模型,减少了能源作物,动物粪便和食物垃圾厌氧消化中总挥发性脂肪酸的过高估计

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摘要

Titration methodologies have been used for the many years for low cost routine monitoring of full scale anaerobic digestion plants. These methodologies have been correlated to indicate the carbonate alkalinity and the volatile fatty acids (VFA) content within digesters. Two commonly used two end-point titration methods were compared using a dataset of 154 samples from energy crop and animal slurry digestates and were shown to be inaccurate in the estimation of tVFA. Using this dataset correlated with HPLC VFA analysis, two empirical bivariate linear regression equations were derived, where the validation dataset showed an absolute tVFA mean error improvement from ±3386 and ±3324 mg kg~(-1) tVFA to ±410 and ±286 mg kg~(-1) tVFA, respectively. The same equation was then applied to a food waste dataset where an absolute tVFA mean error was improved from ±3828 to ±576 mg kg~(-1) tVFA. The newly derived titration equations can provide greater confidence in digester performance monitoring and are tools that can improve digester management.
机译:滴定法已用于全尺寸厌氧消化厂的低成本常规监测多年。这些方法已相互关联,以指示消化池中的碳酸盐碱度和挥发性脂肪酸(VFA)含量。使用来自能源作物和动物粪便消化液的154个样品的数据集,比较了两种常用的两种终点滴定方法,结果表明tVFA的估算不准确。使用与HPLC VFA分析相关的数据集,推导出两个经验性双变量线性回归方程,其中验证数据集显示绝对tVFA平均误差从±3386和±3324 mg kg〜(-1)tVFA改善为±410和±286 mg kg〜(-1)tVFA。然后将相同的方程式应用于食物垃圾数据集,其中绝对tVFA平均误差从±3828提高到±576 mg kg〜(-1)tVFA。新推导的滴定方程可提供对蒸煮器性能监控的更大信心,并且是可以改善蒸煮器管理的工具。

著录项

  • 来源
    《Water Research》 |2014年第15期|162-170|共9页
  • 作者单位

    Sustainable Environment Research Centre, Faculty of Computing, Engineering and Science, University of South Wales, Pontypridd, UK;

    Sustainable Environment Research Centre, Faculty of Computing, Engineering and Science, University of South Wales, Pontypridd, UK;

    ISF GmbH (Schaumann Research & Development), An der Muehlenau 4, D-25421 Pinneberg, Germany;

    Sustainable Environment Research Centre, Faculty of Computing, Engineering and Science, University of South Wales, Pontypridd, UK;

    Sustainable Environment Research Centre, Faculty of Computing, Engineering and Science, University of South Wales, Pontypridd, UK;

    Sustainable Environment Research Centre, Faculty of Computing, Engineering and Science, University of South Wales, Pontypridd, UK;

  • 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

    Anaerobic digestion; Titration volatile fatty acids; Process monitoring; Digester stability; Empirical model;

    机译:厌氧消化;滴定挥发性脂肪酸;过程监控;消化器稳定性;实证模型;

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