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Energies 2017, 10(11), 1822; https://doi.org/10.3390/en10111822

Methodology for Analysing Energy Demand in Biogas Production Plants—A Comparative Study of Two Biogas Plants

1
Department of Management and Engineering, Division of Energy Systems, Linköping University, SE-581 83 Linköping, Sweden
2
Biogas Research Center, Linköping University, SE-581 83 Linköping, Sweden
3
Tranås Energi, SE-573 24 Tranås, Sweden
*
Author to whom correspondence should be addressed.
Received: 30 September 2017 / Revised: 7 November 2017 / Accepted: 8 November 2017 / Published: 10 November 2017
(This article belongs to the Section Energy Sources)
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Abstract

Biogas production through anaerobic digestion may play an important role in a circular economy because of the opportunity to produce a renewable fuel from organic waste. However, the production of biogas may require energy in the form of heat and electricity. Therefore, resource-effective biogas production must consider both biological and energy performance. For the individual biogas plant to improve its energy performance, a robust methodology to analyse and evaluate the energy demand on a detailed level is needed. Moreover, to compare the energy performance of different biogas plants, a methodology with a consistent terminology, system boundary and procedure is vital. The aim of this study was to develop a methodology for analysing the energy demand in biogas plants on a detailed level. In the methodology, the energy carriers are allocated to: (1) sub-processes (e.g., pretreatment, anaerobic digestion, gas cleaning), (2) unit processes (e.g., heating, mixing, pumping, lighting) and (3) a combination of these. For a thorough energy analysis, a combination of allocations is recommended. The methodology was validated by applying it to two different biogas plants. The results show that the methodology is applicable to biogas plants with different configurations of their production system. View Full-Text
Keywords: biogas production; energy demand; methodology; anaerobic digestion; energy performance; renewable fuel; waste management biogas production; energy demand; methodology; anaerobic digestion; energy performance; renewable fuel; waste management
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Lindkvist, E.; Johansson, M.T.; Rosenqvist, J. Methodology for Analysing Energy Demand in Biogas Production Plants—A Comparative Study of Two Biogas Plants. Energies 2017, 10, 1822.

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