A simple and novel volumetric method to metre low gas flows from laboratory-scale bioreactors and its application on laboratory sludge digesters

Tamás Tauber, Brigitta Berta, Zsolt Szabó, József Kovács, Károly Márialigeti, Erika M. Tóth

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5 Citations (Scopus)


A novel, cheap and easy to use method has been developed to measure low gas yields in bioreactors, based on the principle of bubble counting via digital imaging techniques and pattern recognition. No external hardware control is required for the measurements, and the device can be turned into a multichannel tool without further detector accessories. The method proved to perform outstandingly according to the testing and calibrating measurements against standard gas flow and revealed a short periodicity in the gas yields of two parallel laboratory-scale mesophilic biogas reactors providing well analysable data about them. For exact characterization of the oscillation, the data were converted into Morell wavelet spectra, which showed that every feeding period had a characteristic and similarly shaped wavelet profile, thereby this rhythm must have had an immanent source in the community metabolism, and it was not an artefact.

Original languageEnglish
Pages (from-to)1453-1461
Number of pages9
JournalApplied Microbiology and Biotechnology
Issue number4
Publication statusPublished - May 1 2011



  • Biogas production
  • Bubble counting
  • Laboratory-scale digester
  • Low gas yield
  • Pattern recognition

ASJC Scopus subject areas

  • Biotechnology
  • Applied Microbiology and Biotechnology

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