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Biogaserzeugung ohne Flächenkonkurrenz auf Basis von Zwischenfrüchten, Kleegras und Reststoffen

Szerencsits, Manfred and Erhart, Eva (2015) Biogaserzeugung ohne Flächenkonkurrenz auf Basis von Zwischenfrüchten, Kleegras und Reststoffen. Paper at: 13. Wissenschaftstagung Ökologischer Landbau, Hochschule für nachhaltige Entwicklung Eberswalde, 17. - 20. März 2015.

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Summary

Cover or catch crops have beneficial effects for soil, water, erosion, etc. If harvested, they also provide feedstock for biogas without competition for arable land. The latter also applies to clover grass ley or other residues on organic farms without ruminants and for manure. With an explorative approach, combining field experiments and data collection of practical implementation, we investigated achievable yields and identified recommendations for practical use. Gross energy yields of cover crops varied between 700 and 2000 m³ methane (CH4) ha-1 in Austria. The energy return on energy invested (EROI) ranges from 4 to 7, if biogas is upgraded and com¬pressed for biofuel use. Therefore, about 1000 m³ CH4 ha-1 are remaining as net energy yield from 4.5 t of dry matter (DM). With an adequate harvesting process and a price of 85 € t-1 DM cost-covering can be reached with about 4.5 t DM ha-1. If positive side effects are taken into account, 2.5 t DM ha-1 may be sufficient. Even if harvested and organic matter relevant for humification is returned with digestate, beneficial effects of cover crops on soil, water and climate may be improved. 7 – 16 % of the gross biogas yield of cover crops are sufficient for the entire production of cover and main crop from cultivation to harvest including transport. Therefore biogas enables organic farming without fossil fuels. Tractors fuelled with CH4 to 70 – 80 % are already available.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Agrovoc keywords:
LanguageValueURI
EnglishBiogasUNSPECIFIED
Englishcatch cropsUNSPECIFIED
Englishcover cropsUNSPECIFIED
Englishland use competitionUNSPECIFIED
Englishfood securityUNSPECIFIED
Subjects: Food systems > Recycling, balancing and resource management
Crop husbandry
Soil
Environmental aspects
Research affiliation: International Conferences > 2015: Scientific Conference of the German Speaking Countries > Nature conservation, environmental aspects
International Conferences > 2015: Scientific Conference of the German Speaking Countries > Others
ISBN:978-3-89574-885-1
DOI:27238
Related Links:http://www.wissenschaftstagung.de/
Deposited By: Szerencsits, Dr. Manfred
ID Code:27238
Deposited On:22 Jun 2015 13:19
Last Modified:13 Jan 2016 11:32
Document Language:German/Deutsch
Status:Published
Refereed:Peer-reviewed and accepted
Additional Publishing Information:Dieser Beitrag ist im Tagungsband der 13. Wissenschaftstagung erschienen.
Häring, A.M., Hörning, B., Hoffmann-Bahnsen, R., Luley, H., Luthardt, V., Pape, J., Trei, G. (Hrsg.)(2015):
Am Mut hängt der Erfolg - Rückblicke und Ausblicke auf die ökologische Landbewirtschaftung.
Beiträge zur 13. Wissenschaftstagung Ökologischer Landbau, Hochschule für nachhaltige Entwicklung Eberswalde, 17.-20. März 2015
Verlag Dr. Köster, Berlin

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