Anaerobic co-digestion of lipid-spent microalgae with waste activated sludge and glycerol in batch mode

P. Neumann, A. Torres, F. G. Fermoso, R. Borja, DAVID ALEJANDRO JEISON NUÑEZ

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45 Scopus citations

Abstract

Anaerobic co-digestion of lipid-spent Botryococcus braunii (LSBB) with waste activated sludge (WAS) and glycerol was studied. Different co-digestion mixtures were assessed in biochemical methane potential tests, performed at mesophilic temperature (35°C). The experimental methane yields obtained were compared to theoretical values calculated from the methane individual yields. No significant increase in BMP was observed when mixing these substrates. A first-order exponential kinetic model was used to obtain the apparent kinetic constant of the processes assayed. The kinetic constant value of the mixture 25% WAS-75% LSBB was 116%, 16% and 43% higher than for WAS, LSBB and glycerol alone, respectively.

Original languageEnglish
Pages (from-to)85-88
Number of pages4
JournalInternational Biodeterioration and Biodegradation
Volume100
DOIs
StatePublished - 1 May 2015

Keywords

  • Biomethane
  • Co-digestion
  • Glycerol
  • Lipid spent microalgae
  • Waste activated sludge

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