How to report biogas production when monitoring small-scale digesters in field

J. Martí-Herrero, T. Flores, R. Alvarez, D. Perez

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

The aim of this research was to evaluate the error originated when biogas production from field monitoring digesters, influenced by the diurnal temperature cycle, was normalized to standard conditions for pressure and temperature (273.15 K and 100 kPa) from local conditions. The biogas production data is often reported without indicating if done under local conditions, whether these conditions have been standardized and, if they have actually been standardized, the standard temperature and pressure is not indicated. In this research ambient and biogas temperature, as well as biogas production were monitored with a 30 min frequency during three consecutive days, in three different tubular digesters. Normalization was realized using the high frequency data collected as reference values, and also using daily biogas production with mean daily biogas, ambient and nearby meteorological station temperatures. The outcome of this research shows that normalization of biogas production can be obtained using daily biogas production and the daily mean ambient temperature with an overestimation by no more than 1.5%, in comparison to the normalization achieved by using high frequency data from biogas temperature and production. Using mean daily ambient temperature or mean daily biogas temperature results in the same overestimation, while using mean daily ambient temperature from a nearby airport weather station pushes the overestimation up to 2.7%. So, if ambient temperature and altitude is identified, biogas production reported in local conditions can be normalized.

Original languageEnglish
Pages (from-to)31-36
Number of pages6
JournalBiomass and Bioenergy
Volume84
DOIs
StatePublished - 1 Jan 2016

Bibliographical note

Funding Information:
Financial support to carry out this research was provided by Rada&Asociados , Hivos and the Endev-Bolivia Program of the GIZ , as well as the collaboration of the Caribbean and Latin American Biodigesters Net (RedBioLAC). Jaime Martí-Herrero is thankful to the Prometeo Project of the Secretariat for Higher Education, Science, Technology and Innovation of the Republic of Ecuador that funded part of his work. The authors wish to acknowledge the revision of the document by Mike Baker and Samay Schütt. Suggestions provided by three anonymous reviewers improved this paper.

Publisher Copyright:
© 2015 Elsevier Ltd.

Keywords

  • Anaerobic digestion
  • Biogas production
  • Monitoring
  • Normalization
  • Pressure
  • Temperature

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