Manure-based biogas fermentation residues – friend or foe of soil fertility?
Abstract
Anaerobic digestion of organic residues has the potential to significantly contribute to a shift from fossil to renewable energy. The by-product, anaerobic slurry, does have properties that are different from the undigested material. There are concerns of soil organic matter depletion in soils, enhanced greenhouse gas and odour emissions, and pathogen spread upon production and use of biogas slurries as fertilizer. However, considering the pros and cons, anaerobic digestion of residues does have positive effects for the climate, the environment and for the farmer, compared to the use of undigested matter.
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Digestate could enhance soil microbial activity and biomass as compared to manure.
“While differences in soil microbial community and activity between manure and digestate were not such that they justified the recommendation of either substrate before the other (Abubaker et al., 2013), Insam et al. (2015) concluded that digestate could enhance soil microbial activity and biomass as compared to manure.”
From Intensify production, transform biomass to energy and novel goods and protect soils in Europe—A vision how to mobilize marginal lands (2018) · cites this paper as Insam et al., 2015
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References 202 · Cited by 321
- Authors
- Insam, H., Gómez-Brandón, M., & Ascher, J.
- Affiliations
- Universität Innsbruck (AT)
- Corresponding author
- Insam, Heribert
- ORCID
- Insam, Heribert
- Venue
- Soil Biology and Biochemistry
- Publisher
- Elsevier BV
- Published
- 2015-05
- Volume
- 84
- Pages
- 1-14
- ISSN
- 0038-0717 (ISSN-L)
- OpenAlex
- W2071165286
- Cited by
- 321
- References
- 202
- Citations by year
- 2026: 15 · 2025: 22 · 2024: 25 · 2023: 29 · 2022: 42 · 2021: 43 · 2020: 33 · 2019: 39 · 2018: 27 · 2017: 19 · 2016: 19 · 2015: 8
- FWCI
- 33.06
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Soil Biology and Biochemistry (publishedVersion)
- Topics
- Physical Sciences › Engineering › Building and Construction › Anaerobic Digestion and Biogas Production
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
- Life Sciences › Agricultural and Biological Sciences › Soil Science › Agricultural Science and Fertilization
- Keywords
- anaerobic digestion, digestate, manure, soil fertility, soil organic matter, greenhouse gas emissions, odor emissions, pathogen spread, renewable energy, organic residues
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