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| Markussen, Mads Ville; Østergård, Hanne; Oleskowicz-Popiel, Piotr; Schmidt, Jens Ejby; Pugesgaard, Siri. |
| One obvious way to enhance agricultural resilience is for farms to increase self-sufficiency with necessities such as fuel, fodder and fertilizer. Our research seeks to uncover these potentials for Danish organic dairy farming. The setting is a theoretical model of a farm-cooperation of 10 farms of 100 ha each producing only milk and animals for slaughtering and being self-sufficient with fodder and fertilizer. The question is if they can be self-sufficient with energy by means of shared biogas and/ or bioethanol production facilities. The method is mapping of energy, emergy (embodied energy measured in solar energy joules) and mass flows in different scenarios, that are based on empirical data from Danish dairy farms concerning mix of crops, crop yields,... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Farming Systems Recycling; Balancing and resource management Technology assessment. |
| Ano: 2009 |
URL: http://orgprints.org/15842/1/15842_Abstract.pdf |
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| Petersson, Anneli; Thomsen, Mette Hedegaard; Hauggaard-Nielsen, Henrik; Thomsen, Anne Belinda. |
| To meet the increasing need for bioenergy several raw materials have to be considered for the production of e.g. bioethanol and biogas.In this study, three lignocellulosic raw materials were studied, i.e. (1) winter rye straw (Secale cereale L), (2) oilseed rape straw (Brassica napus L.) and (3) faba bean straw (Viciafaba L.). Their composition with regard to cellulose, hemicellulose, lignin, extractives and ash was evaluated, as well as their potential as raw materials for ethanol and biogas production. The materials were pretreated by wet oxidation using parameters previously found to be optimal for pretreatment of corn stover (195 1C, 15 min, 2 g l_1 Na2CO3 and 12 bar oxygen). It was shown that pretreatment was necessary for ethanol production from all... |
| Tipo: Journal paper |
Palavras-chave: Farming Systems Recycling; Balancing and resource management Crop husbandry. |
| Ano: 2007 |
URL: http://orgprints.org/18980/4/18980.pdf |
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| Thomsen, Mette Hedegaard; Hauggaard-Nielsen, Henrik. |
| To obtain the best possible net energy balance of the bioethanol production the biomass raw materials used need to be produced with limited use of non-renewable fossil fuels. Intercropping strategies are known to maximize growth and productivity by including more than one species in the crop stand, very often with legumes as one of the components. In the present study clover-grass is undersown in a traditional wheat crop. Thereby, it is possible to increase input of symbiotic fixation of atmospheric nitrogen into the cropping systems and reduce the need for fertilizer applications. Furthermore, when using such wheat and clover-grass mixtures as raw material, addition of urea and other fermentation nutrients produced from fossil fuels can be reduced in the... |
| Tipo: Journal paper |
Palavras-chave: Farming Systems Recycling; Balancing and resource management Crop husbandry. |
| Ano: 2008 |
URL: http://orgprints.org/18981/4/18981.pdf |
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