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Investigating two-phase digestion of grass silage for demand-driven biogas applications: Effect of particle size and rumen fluid addition

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  • Wall, D.M.
  • Allen, E.
  • O'Shea, R.
  • O'Kiely, P.
  • Murphy, J.D.

Abstract

High lignocellulose content grass silage was investigated for two-phase digestion (leaching followed by upflow anaerobic sludge blanket (UASB)) for application to demand-driven biogas production. Leaching trials were undertaken investigating the effects of particle size reduction and rumen fluid addition on the hydrolysis and acidogenesis phases. Reducing grass silage particle size to <1 cm was not suited to leaching as particles could not be fully entrained in the system; this was not an issue at >3 cm particle size. Rumen fluid addition increased production of volatile fatty acids (VFA) but reduced pH levels, which subsequently hindered hydrolysis of volatile solids (VS). When electricity demand is low, it is recommended to operate in leach only mode with grass silage particle size >3 cm and with rumen fluid addition; this limits VS destruction to 30% while maintaining a high VFA yield. When electricity demand is high, connection of the UASB generates 61% destruction of VS maximising biogas production. Operation of the SLBR-UASB achieves lower specific methane yields than traditional single-stage digestion but may offer advantages in demand driven biogas systems.

Suggested Citation

  • Wall, D.M. & Allen, E. & O'Shea, R. & O'Kiely, P. & Murphy, J.D., 2016. "Investigating two-phase digestion of grass silage for demand-driven biogas applications: Effect of particle size and rumen fluid addition," Renewable Energy, Elsevier, vol. 86(C), pages 1215-1223.
    • Handle: RePEc:eee:renene:v:86:y:2016:i:c:p:1215-1223
    DOI: 10.1016/j.renene.2015.09.049
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    References listed on IDEAS

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    1. G. Ganesh & Obuli P. Karthikeyan & Kurian Joseph, 2010. "Enhancing the hydrolysis step in anaerobic digestion of municipal solid waste using rumen fluid," International Journal of Environmental Technology and Management, Inderscience Enterprises Ltd, vol. 13(3/4), pages 311-321.
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    Cited by:

    1. Tsapekos, P. & Khoshnevisan, B. & Alvarado-Morales, M. & Symeonidis, A. & Kougias, P.G. & Angelidaki, Irini, 2019. "Environmental impacts of biogas production from grass: Role of co-digestion and pretreatment at harvesting time," Applied Energy, Elsevier, vol. 252(C), pages 1-1.
    2. Shane, Agabu & Gheewala, Shabbir H. & Kafwembe, Young, 2017. "Urban commercial biogas power plant model for Zambian towns," Renewable Energy, Elsevier, vol. 103(C), pages 1-14.
    3. Van Dael, Miet & Kreps, Sabine & Virag, Ana & Kessels, Kris & Remans, Koen & Thomas, Denis & De Wilde, Fabian, 2018. "Techno-economic assessment of a microbial power-to-gas plant – Case study in Belgium," Applied Energy, Elsevier, vol. 215(C), pages 416-425.
    4. Dahlin, Johannes & Nelles, Michael & Herbes, Carsten, 2017. "Biogas digestate management: Evaluating the attitudes and perceptions of German gardeners towards digestate-based soil amendments," Resources, Conservation & Recycling, Elsevier, vol. 118(C), pages 27-38.
    5. Liang, Jinsong & Nabi, Mohammad & Zhang, Panyue & Zhang, Guangming & Cai, Yajing & Wang, Qingyan & Zhou, Zeyan & Ding, Yiran, 2020. "Promising biological conversion of lignocellulosic biomass to renewable energy with rumen microorganisms: A comprehensive review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 134(C).
    6. Gao, Zhenghui & Alshehri, Khaled & Li, Yuan & Qian, Hang & Sapsford, Devin & Cleall, Peter & Harbottle, Michael, 2022. "Advances in biological techniques for sustainable lignocellulosic waste utilization in biogas production," Renewable and Sustainable Energy Reviews, Elsevier, vol. 170(C).
    7. Zarkadas, I. & Dontis, G. & Pilidis, G. & Sarigiannis, D.A., 2016. "Exploring the potential of fur farming wastes and byproducts as substrates to anaerobic digestion process," Renewable Energy, Elsevier, vol. 96(PB), pages 1063-1070.
    8. Susanne Theuerl & Christiane Herrmann & Monika Heiermann & Philipp Grundmann & Niels Landwehr & Ulrich Kreidenweis & Annette Prochnow, 2019. "The Future Agricultural Biogas Plant in Germany: A Vision," Energies, MDPI, vol. 12(3), pages 1-32, January.

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