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Representative Sampling Implementation in Online VFA/TIC Monitoring for Anaerobic Digestion

Author

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  • Camilo Wilches

    (bwe Energiesysteme GmbH Co. KG, Zeppelinring 12-16, 26127 Friesoythe, Germany)

  • Maik Vaske

    (bwe Energiesysteme GmbH Co. KG, Zeppelinring 12-16, 26127 Friesoythe, Germany)

  • Kilian Hartmann

    (Department of Engineering Science, University of Applied Sciences Aschaffenburg, Würzburger Str. 45, D-63743 Aschaffenburg, Germany)

  • Michael Nelles

    (Faculty for Agricultural and Environmental Sciences, University of Rostock, Justus-von-Liebig-Weg 6, D-18059 Rostock, Germany)

Abstract

This paper describes an automatic sampling system for anaerobic reactors that allows taking representative samples following the guidelines of Gy’s (1998) theory of sampling. Due to the high heterogeneity degree in a digester the sampling errors are larger than the analysis error, making representative sampling a prerequisite for successful process control. In our system, samples are automatically processed, generating a higher density of data and avoiding human error by sample manipulation. The combination of a representative sampling system with a commercial automate titration unit generates a robust online monitoring system for biogas plants. The system was successfully implemented in an operating biogas plant to control a feeding-on-demand biogas system.

Suggested Citation

  • Camilo Wilches & Maik Vaske & Kilian Hartmann & Michael Nelles, 2019. "Representative Sampling Implementation in Online VFA/TIC Monitoring for Anaerobic Digestion," Energies, MDPI, vol. 12(6), pages 1-18, March.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:6:p:1179-:d:217364
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    References listed on IDEAS

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    1. Madsen, Michael & Holm-Nielsen, Jens Bo & Esbensen, Kim H., 2011. "Monitoring of anaerobic digestion processes: A review perspective," Renewable and Sustainable Energy Reviews, Elsevier, vol. 15(6), pages 3141-3155, August.
    2. Andreas Lemmer & Hans-Joachim Naegele & Jana Sondermann, 2013. "How Efficient are Agitators in Biogas Digesters? Determination of the Efficiency of Submersible Motor Mixers and Incline Agitators by Measuring Nutrient Distribution in Full-Scale Agricultural Biogas ," Energies, MDPI, vol. 6(12), pages 1-19, December.
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    1. Yong Hu & Haiyuan Ma & Jiang Wu & Takuro Kobayashi & Kai-Qin Xu, 2022. "Performance Comparison of CSTR and CSFBR in Anaerobic Co-Digestion of Food Waste with Grease Trap Waste," Energies, MDPI, vol. 15(23), pages 1-11, November.

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