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Co-digestion of salix and manure for biogas: importance of clone choice, coppicing frequency and reactor setup

Rönnberg Wästljung, Ann-Christin and Ohlsson, Jonas and Nordh, Nils-Erik and Schnürer, Anna (2020). Co-digestion of salix and manure for biogas: importance of clone choice, coppicing frequency and reactor setup. Energies. 13 , 3804 , 1-15
[Journal article]

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Abstract

Animal manure represents a major source of renewable energy that can be converted into biogas using anaerobic digestion. In order to most efficiently utilize this resource, it can be co-digested with energy dense, high biomethanation potential feedstocks such as energy crops. However, such feedstocks typically require pretreatments which are not feasible for small-scale facilities. We investigated the use of single-stage and the sequential co-digestion of comminuted but otherwise non-pretreated Salix with animal manure, and further investigated the effects of coppicing frequency and clone choice on biomethanation potential and the area requirements for a typical Swedish farm-scale anaerobic digester using Salix and manure as feedstock. In comparison with conventional single-stage digestion, sequential digestion increased the volumetric and specific methane production by 57% to 577 NmL L-1 d-1 and 192 NmL (g volatile solids (VS))−1, respectively. Biomethanation potential was the highest for the two-year-old shoots, although gains in biomass productivity suggest that every-third-year coppicing maybe a better strategy for supplying Salix feedstock for anaerobic digestion. The biomethane production performance of the sequential digestion of minimally pretreated Salix mirrors that of hydrothermally pretreated hardwoods and may provide an option where such pretreatments are not feasible.

Authors/Creators:Rönnberg Wästljung, Ann-Christin and Ohlsson, Jonas and Nordh, Nils-Erik and Schnürer, Anna
Title:Co-digestion of salix and manure for biogas: importance of clone choice, coppicing frequency and reactor setup
Year of publishing :2020
Volume:13
Article number:3804
Number of Pages:15
Publisher:MDPI
ISSN:1996-1073
Language:English
Publication Type:Journal 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 > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Other Biological Topics
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Microbiology (Microbiology in the medical area to be 30109)
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
Keywords:anaerobic digestion, co-digestion, energy crops, manure, Salix
URN:NBN:urn:nbn:se:slu:epsilon-p-107061
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-107061
Additional ID:
Type of IDID
DOI10.3390/en13153804
ID Code:17379
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Crop Production Ecology
(NL, NJ) > Dept. of Plant Biology and Forest Genetics (until 131231)
(NL, NJ) > Department of Molecular Sciences
Deposited By: SLUpub Connector
Deposited On:01 Sep 2020 12:52
Metadata Last Modified:01 Sep 2020 12:53

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