Anaerobic Digestion of Hemp and Flax Straw and Shives and Rapeseed Straw by the Ruminal Microbiota

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Aline Fernandes Figueiredo
  • Melanie Brede
  • Jannika Heller
  • Larissa Redzepovic
  • Lukas Illi
  • Dirk Weichgrebe

External Research Organisations

  • University of Veterinary Medicine of Hannover, Foundation
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Details

Original languageEnglish
Pages (from-to)700-709
Number of pages10
JournalBioEnergy research
Volume17
Issue number1
Early online date9 Sept 2023
Publication statusPublished - Mar 2024

Abstract

To mitigate greenhouse gas emissions and improve energy supply security, there is an increasing effort toward the use of non-fossil energy sources. Crop residues have a great potential to be exploited as biomass for biogas production. However, due to their lignocellulosic structures they are difficult to degrade and do not reach competitive performance. A feasible option to mine these substrates is present in the forestomach of ruminants. Therefore, the aim of the present study was to use rumen microorganisms to improve anaerobic digestion (AD) of crop residues. For this purpose, hemp straw, mechanically pre-treated hemp fibers and shives, flax straw, flax shives, and aged and fresh rapeseed straw were evaluated using the rumen simulation technique. The AD of the substrates was divided into three batches. In two batches, hay was added as a control substrate. In summary, none of the analyzed substrates had an equivalent performance as the control hay, but pre-treated hemp fibers and shives had better AD parameters compared to all other alternative substrates, with the lowest pH (mean: 6.81), highest short chain fatty acid (20.0 mmol/day) and H2 production (25.6 mM) and highest degradability (25.2%). Flax straw had the second-best performance (6.81, 17.4 mmol/day, 20.6 mM and 22.2%, respectively), followed by fresh rapeseed straw, hemp straw, aged rapeseed straw and flax shives. Therefore, hemp fibers and shives demonstrated to be the most suitable substrates for AD. However, since pre-treatment can represent significant additional costs for biogas production, flax straw also demonstrated to be a good alternative.

Keywords

    Anaerobic digestion, Biogas, Crop residues, Rumen Simulation Technique (RUSITEC), Straw

ASJC Scopus subject areas

Sustainable Development Goals

Cite this

Anaerobic Digestion of Hemp and Flax Straw and Shives and Rapeseed Straw by the Ruminal Microbiota. / Figueiredo, Aline Fernandes; Brede, Melanie; Heller, Jannika et al.
In: BioEnergy research, Vol. 17, No. 1, 03.2024, p. 700-709.

Research output: Contribution to journalArticleResearchpeer review

Figueiredo AF, Brede M, Heller J, Redzepovic L, Illi L, Weichgrebe D. Anaerobic Digestion of Hemp and Flax Straw and Shives and Rapeseed Straw by the Ruminal Microbiota. BioEnergy research. 2024 Mar;17(1):700-709. Epub 2023 Sept 9. doi: 10.1007/s12155-023-10667-7, 10.15488/16272
Figueiredo, Aline Fernandes ; Brede, Melanie ; Heller, Jannika et al. / Anaerobic Digestion of Hemp and Flax Straw and Shives and Rapeseed Straw by the Ruminal Microbiota. In: BioEnergy research. 2024 ; Vol. 17, No. 1. pp. 700-709.
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AU - Figueiredo, Aline Fernandes

AU - Brede, Melanie

AU - Heller, Jannika

AU - Redzepovic, Larissa

AU - Illi, Lukas

AU - Weichgrebe, Dirk

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