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Regional variation in climate impact of grass-based biogas production: A Swedish case study

Nilsson, Johan and Sundberg, Cecilia and Tidåker, Pernilla and Hansson, Per-Anders (2020). Regional variation in climate impact of grass-based biogas production: A Swedish case study. Journal of Cleaner Production. 275 , 122778
[Research article]

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Abstract

Transitioning from a fossil economy to a bio-economy will inevitably increase the demand for biomass production. One strategy to meet the demand is to re-cultivate set-aside arable land. This study investigated the climate impact and energy potential of grass-based biogas produced using fallow land in Uppsala municipality, Sweden. The assessment was performed on regional level for more than 1000 individual sites, using the agro-ecosystem model DeNitrification DeComposition (DNDC) in combination with time-dynamic life cycle assessment methodology. The results showed that the system could significantly increase biogas production within the region, which would reduce the climate impact by 9950 Mg CO2-eq per year. Compared with diesel fuel, the grass-based biogas gave a GWP reduction of 85%. However, the site-specific GWP reduction showed large spatial variability, ranging between 102 and 79% compared with diesel fuel, depending on where in the region the grass was cultivated. Two alternative scenarios were investigated, increased mineral N fertilisation and inclusion of N-fixing crops in the feedstock mixture. The highest mitigation per biogas energy produced was found for the N-fixing scenario but, because of lower yields, this scenario had lower total mitigation potential for the region than the increased fertilisation scenario. The increased fertilisation scenario had a lower climate mitigation effect per biogas energy produced, but the highest mitigation potential when the whole region was considered, because of the increased biogas production. The method applied in this study can guide land-use planning of local energy production from arable land, also for other regions. (C) 2020 The Author(s). Published by Elsevier Ltd.

Authors/Creators:Nilsson, Johan and Sundberg, Cecilia and Tidåker, Pernilla and Hansson, Per-Anders
Title:Regional variation in climate impact of grass-based biogas production: A Swedish case study
Series Name/Journal:Journal of Cleaner Production
Year of publishing :2020
Volume:275
Article number:122778
Number of Pages:10
Publisher:ELSEVIER SCI LTD
ISSN:0959-6526
Language:English
Publication Type:Research article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Environmental Sciences (social aspects to be 507)
Keywords:Grass cultivation, Biomethane, Soil carbon sequestration, DNDC, Regional-LCA, Soil N2O emissions
URN:NBN:urn:nbn:se:slu:epsilon-p-109047
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-109047
Additional ID:
Type of IDID
DOI10.1016/j.jclepro.2020.122778
Web of Science (WoS)000579495100030
ID Code:19126
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Energy and Technology
Deposited By: SLUpub Connector
Deposited On:08 Dec 2020 10:23
Metadata Last Modified:15 Jan 2021 19:44

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