Biomass Conversion and Biorefinery

, Volume 8, Issue 2, pp 245–254 | Cite as

Miscanthus as biogas feedstock: influence of harvest time and stand age on the biochemical methane potential (BMP) of two different growing seasons

  • Axel Schmidt
  • Sébastien Lemaigre
  • Thorsten Ruf
  • Philippe Delfosse
  • Christoph Emmerling
Original Article
  • 51 Downloads

Abstract

The use of perennial crops instead of maize as feedstock in biogas plants can be associated with multiple environmental and economic benefits. One promising species in this domain is the C4-grass Miscanthus × giganteus. The use of its biomass can mitigate carbon dioxide emissions by substitution of fossil fuels, sequestration of carbon in soils and reduced fertilizing. We compared Miscanthus from two different old fields (established 1995 and 2008) at three different harvest dates over 2 years. While the harvest in spring, like usual for combustion purposes, led to relatively low methane yields per hectare, the harvest in autumn, when the biomass is still green, exceeded the average methane yields per hectare of maize. The comparison of different old Miscanthus fields showed that there is no significant difference in terms of biomass yield, specific BMP and BMP per hectare. Only the influence of repeated autumn harvest showed differences in the methane production per hectare between both stand ages. The methane yield of the younger stand did not change considerable, while in the older stand, the productivity decreased about 15% after 1 year.

Keywords

Miscanthus Perennial energy crop Anaerobic digestion Biochemical methane potential Harvest date Stand age 

Abbreviations

BMP

Biochemical methane potential

FM

Fresh matter

LN

Normalized litre (1013 hPa, 0 °C)

MWTP

Municipal wastewater treatment plant

SD

Standard deviation

SE

Standard error

TS

Total solids = dry matter

VS

Volatile solids = organic dry matter

%

percent per weight

Notes

Acknowledgements

This work has been financially supported by the Ministry of Education, Science, Youth & Culture Rhineland-Palatinate, Germany, within the Research Initiative: Trier Centre of Sustainable Studies (TriCSS), 04/2013–12/2016, University of Trier.

The authors would like to thank Marie Fossépré, Anaïs Noo and Bénédicte De Vos for their valuable support conducting the experiments. We also acknowledge the farmer Franz-Josef Koch for the possibility to work on his Miscanthus fields.

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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Axel Schmidt
    • 1
  • Sébastien Lemaigre
    • 2
  • Thorsten Ruf
    • 1
  • Philippe Delfosse
    • 2
  • Christoph Emmerling
    • 1
  1. 1.Faculty of Regional and Environmental Sciences, Soil Science DepartmentUniversity of TrierTrierGermany
  2. 2.Environmental Research and Innovation Department (ERIN)Luxembourg Institute of Science and Technology (LIST)BelvauxLuxembourg

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