Co-Digestion of <i>Salix</i> and Manure for Biogas: Importance of Clone Choice, Coppicing Frequency and Reactor Setup
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 feedstock...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-07-01
|
| Series: | Energies |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1996-1073/13/15/3804 |
| _version_ | 1797561455353004032 |
|---|---|
| author | Jonas A. Ohlsson Ann-Christin Rönnberg-Wästljung Nils-Erik Nordh Anna Schnürer |
| author_facet | Jonas A. Ohlsson Ann-Christin Rönnberg-Wästljung Nils-Erik Nordh Anna Schnürer |
| author_sort | Jonas A. Ohlsson |
| collection | DOAJ |
| description | 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 <i>Salix</i> 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 <i>Salix</i> 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<sup>−1</sup> d<sup>−1</sup> and 192 NmL (g volatile solids (VS))<sup>−1</sup>, respectively. Biomethanation potential was the highest for the two-year-old shoots, although gains in biomass productivity suggest that every-third-year coppicing may be a better strategy for supplying <i>Salix</i> feedstock for anaerobic digestion. The biomethane production performance of the sequential digestion of minimally pretreated <i>Salix</i> mirrors that of hydrothermally pretreated hardwoods and may provide an option where such pretreatments are not feasible. |
| first_indexed | 2024-03-10T18:14:13Z |
| format | Article |
| id | doaj.art-9cb1dd22dfbd4dd2b21f609d86cf6885 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T18:14:13Z |
| publishDate | 2020-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-9cb1dd22dfbd4dd2b21f609d86cf68852023-11-20T07:51:52ZengMDPI AGEnergies1996-10732020-07-011315380410.3390/en13153804Co-Digestion of <i>Salix</i> and Manure for Biogas: Importance of Clone Choice, Coppicing Frequency and Reactor SetupJonas A. Ohlsson0Ann-Christin Rönnberg-Wästljung1Nils-Erik Nordh2Anna Schnürer3Department of Molecular Sciences, Swedish University of Agricultural Sciences, Box 7015, S-750 07 Uppsala, SwedenDepartment of Plant Biology, Linnean Centre for Plant Biology, Swedish University of Agricultural Sciences, Box 7080, S-750 07 Uppsala, SwedenDepartment of Crop Production Ecology, Swedish University of Agricultural Sciences, Box 7043, S-750 07 Uppsala, SwedenDepartment of Molecular Sciences, Swedish University of Agricultural Sciences, Box 7015, S-750 07 Uppsala, SwedenAnimal 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 <i>Salix</i> 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 <i>Salix</i> 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<sup>−1</sup> d<sup>−1</sup> and 192 NmL (g volatile solids (VS))<sup>−1</sup>, respectively. Biomethanation potential was the highest for the two-year-old shoots, although gains in biomass productivity suggest that every-third-year coppicing may be a better strategy for supplying <i>Salix</i> feedstock for anaerobic digestion. The biomethane production performance of the sequential digestion of minimally pretreated <i>Salix</i> mirrors that of hydrothermally pretreated hardwoods and may provide an option where such pretreatments are not feasible.https://www.mdpi.com/1996-1073/13/15/3804anaerobic digestionco-digestionenergy cropsmanure<i>Salix</i> |
| spellingShingle | Jonas A. Ohlsson Ann-Christin Rönnberg-Wästljung Nils-Erik Nordh Anna Schnürer Co-Digestion of <i>Salix</i> and Manure for Biogas: Importance of Clone Choice, Coppicing Frequency and Reactor Setup Energies anaerobic digestion co-digestion energy crops manure <i>Salix</i> |
| title | Co-Digestion of <i>Salix</i> and Manure for Biogas: Importance of Clone Choice, Coppicing Frequency and Reactor Setup |
| title_full | Co-Digestion of <i>Salix</i> and Manure for Biogas: Importance of Clone Choice, Coppicing Frequency and Reactor Setup |
| title_fullStr | Co-Digestion of <i>Salix</i> and Manure for Biogas: Importance of Clone Choice, Coppicing Frequency and Reactor Setup |
| title_full_unstemmed | Co-Digestion of <i>Salix</i> and Manure for Biogas: Importance of Clone Choice, Coppicing Frequency and Reactor Setup |
| title_short | Co-Digestion of <i>Salix</i> and Manure for Biogas: Importance of Clone Choice, Coppicing Frequency and Reactor Setup |
| title_sort | co digestion of i salix i and manure for biogas importance of clone choice coppicing frequency and reactor setup |
| topic | anaerobic digestion co-digestion energy crops manure <i>Salix</i> |
| url | https://www.mdpi.com/1996-1073/13/15/3804 |
| work_keys_str_mv | AT jonasaohlsson codigestionofisalixiandmanureforbiogasimportanceofclonechoicecoppicingfrequencyandreactorsetup AT annchristinronnbergwastljung codigestionofisalixiandmanureforbiogasimportanceofclonechoicecoppicingfrequencyandreactorsetup AT nilseriknordh codigestionofisalixiandmanureforbiogasimportanceofclonechoicecoppicingfrequencyandreactorsetup AT annaschnurer codigestionofisalixiandmanureforbiogasimportanceofclonechoicecoppicingfrequencyandreactorsetup |