Particle size reduction optimization of Laminaria spp. biomass for enhanced methane production

Silvia Tedesco, Dubhaltach Mac Lochlainn, Abdul Ghani Olabi

Research output: Contribution to journalArticle

Abstract

Recent studies have reported improved biogas and methane yield from marine biomass when the particle size is mechanically reduced and the specific surface area available to enzymes is increased prior to anaerobic incubation. Although the advantage of reducing the particle size has been identified, an ideal particle size that would offer greater yield with a positive energy balance has not been identified for such substrate to date. As particle size reduction by mechanical means is often highly demanding in energy, this paper attempts to fill this gap for macroalgal biomass by identifying the particle size distribution allowing the highest biogas and methane yields obtained in a previous work. The study estimated that when about 80% of the particles are sized below 1.6 mm2, a biogas and methane yield improvement of up to 52% and 53% respectively can be achieved. The results are discussed in relation to the biogas yield, related methane content and potential inhibitory phenomena occurred during the fermentation.

Original languageEnglish
Pages (from-to)857-862
JournalEnergy
Volume76
DOIs
Publication statusPublished - 1 Nov 2014

Keywords

  • Methane
  • Biogas
  • Macroalgae
  • Seaweeds
  • Mechanical pre-treatment
  • Particle size

Cite this

Tedesco, Silvia ; Mac Lochlainn, Dubhaltach ; Olabi, Abdul Ghani. / Particle size reduction optimization of Laminaria spp. biomass for enhanced methane production. In: Energy. 2014 ; Vol. 76. pp. 857-862.
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Particle size reduction optimization of Laminaria spp. biomass for enhanced methane production. / Tedesco, Silvia; Mac Lochlainn, Dubhaltach; Olabi, Abdul Ghani.

In: Energy, Vol. 76, 01.11.2014, p. 857-862.

Research output: Contribution to journalArticle

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AU - Mac Lochlainn, Dubhaltach

AU - Olabi, Abdul Ghani

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AB - Recent studies have reported improved biogas and methane yield from marine biomass when the particle size is mechanically reduced and the specific surface area available to enzymes is increased prior to anaerobic incubation. Although the advantage of reducing the particle size has been identified, an ideal particle size that would offer greater yield with a positive energy balance has not been identified for such substrate to date. As particle size reduction by mechanical means is often highly demanding in energy, this paper attempts to fill this gap for macroalgal biomass by identifying the particle size distribution allowing the highest biogas and methane yields obtained in a previous work. The study estimated that when about 80% of the particles are sized below 1.6 mm2, a biogas and methane yield improvement of up to 52% and 53% respectively can be achieved. The results are discussed in relation to the biogas yield, related methane content and potential inhibitory phenomena occurred during the fermentation.

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