Journal article
Optimised biogas production from the co-digestion of sugar beet with pig slurry: Integrating energy, GHG and economic accounting
Department of Environmental Engineering, Technical University of Denmark1
Residual Resource Engineering, Department of Environmental Engineering, Technical University of Denmark2
Aarhus University3
University of Southern Denmark4
Department of Management Engineering, Technical University of Denmark5
Energy Economics and Regulation, Systems Analysis, Department of Management Engineering, Technical University of Denmark6
Knowledge Centre for Agriculture7
Norwegian Institute for Sustainability Research8
University of Copenhagen9
Several countries have established a number of increased targets for energy production from renewable sources. Biogas production, which will play a key role in future energy systems largely based on renewable sources, is expected to grow significantly in the next few decades. To achieve these ambitious targets, the biogas production chain has to be optimised to obtain economic viability and environmental sustainability while making use of a diversified range of feedstock materials, including agricultural residues, agro-industrial residues and, to some extent, dedicated energy crops.
In this study, we integrated energetic, GHG and economic analysis to optimise biogas production from the co-digestion of pig slurry (PS) and sugar beet pulp silage (SB). We found that utilising SB as a co-substrate improves the energy and GHG balances, mostly because of increased energy production. However, utilising SB negatively affects the profitability of biogas production, because of the increased costs involved in feedstock supply.
The scale of the processing plant is neutral in terms of profitability when SB is added. The results indicate that medium-to large-sized biogas plants, using low shares of SB co-substrate, may be the preferred solution.
Language: | English |
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Year: | 2016 |
Pages: | 606-617 |
ISSN: | 18736785 and 03605442 |
Types: | Journal article |
DOI: | 10.1016/j.energy.2016.06.068 |
ORCIDs: | Boldrin, Alessio , Fitamo, Temesgen Mathewos , Jensen, Ida Græsted , Nielsen, Lise Skovsgaard , 0000-0002-9168-3251 and 0000-0002-7034-1527 |
Agricultural wastes Agriculture Beta vulgaris subsp. vulgaris Biogas Chains Cost benefit analysis Crops Economic analysis Economy of scale Energy (all) Feedstocks Mass balance Pollution Profitability SDG 7 - Affordable and Clean Energy Silage Slurry pipelines Substrates Sugar beets Suidae Sustainable development Transport costs Value chain analysis economy of scale mass balance silage transport costs value chain analysis