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| Oleskowicz-Popiel, Piotr; Kádár, Zsófia; Heiske, Stefan; Klein-Marcuschamer , D.; Simmons, Blake A.; Blanch, Harvey W.; Schmidt, Jens Ejbye. |
| The addition of a biorefinery to an organic farm was investigated, where ethanol was produced from germinated rye grains and whey, and the effluent was separated into two streams: the protein-rich solid fraction, to be used as animal feed, and the liquid fraction, which can be co-digested with clover grass silage to produce biogas. A method for ethanol production from rye was applied by utilizing inherent amylase activity from germination of the seed. Biogas potential of ethanol fermentation effluent was measured through anaerobic digestion trials. The effluent from the trials was assumed to serve as natural fertilizer. A technoeconomic analysis was also performed; total capital investment was estimated to be approximately 4 M USD. Setting a methane... |
| Tipo: Journal paper |
Palavras-chave: Technology assessment; Post harvest management and techniques. |
| Ano: 2012 |
URL: http://orgprints.org/20461/4/20461.pdf |
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| Kádár, Zsófia; Christensen , Anne Deen; Oleskowicz-Popiel, Piotr; Heiske, Stefan; Thomsen , Mette Hedegaard; Schmidt, Jens Ejbye. |
| Organic agriculture is one sustainable alternative to avoid negative environmental effects often caused by conventional agriculture. The area for organic farming in Europe is increased rapidly in the last decades and Denmark is one of the top-ten countries in Europe as regards the organic share of the total cultivated area. The production of bioenergy from local biological resources and the maintenance of soil fertility seem to have been opposing aims in organic agriculture. In organic farming, there is a strong effort to reduce the reliance on fossil fuels and decrease greenhouse gas emissions in organic agriculture. Cheese whey is a by-product from the dairy industry, which has the highest market share of organic foods in Denmark. It generates... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Technology assessment; Composting and manuring; Post harvest management and techniques. |
| Ano: 2011 |
URL: http://orgprints.org/19017/2/19017.pdf |
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| Kádár, Zsófia; Christensen, Anne Deen; Thomsen, Mette Hedegaard; Bjerre, Anne Belinda. |
| In organic farming, there is a strong effort to minimize the share of non-renewable resources (e.g. fossil fuels) and use only (preferably on-farm produced) bio-based energy and renewable raw materials, with the aim of achieving sustainable production systems and to become self-sufficient in energy. Throughout our studies, wheat and rye grain was used as raw material in bioethanol production with the purpose of producing in situ enzymes (during germination) for the hydrolysis of starch in the grains and compared with commercial amylase enzyme preparations. Whey permeate was incorporated into the grain in Simultaneous Saccharification and Fermentation (SSF) process to use a cheap nutrient and water source. The ethanol fermentations were completed by 190... |
| Tipo: Journal paper |
Palavras-chave: Post harvest management and techniques. |
| Ano: 2011 |
URL: http://orgprints.org/19010/1/JFUE_5339[1].pdf |
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| Oleskowicz-Popiel, Piotr; Kádár, Zsófia; Heiske, Stefan; Klein-Marcuschamer , D.; Schmidt, Jens Ejbye. |
| The organic farming community has long been recognized for its environmental awareness and has been seeking ways to reduce greenhouse gas emissions and become energy independent. In that regard, ethanol can substitute a fraction of the gasoline used by farming equipment, whereas biogas can fuel the production of heat and electricity for the farm. We investigated the addition of a biorefinery to an organic farm, where ethanol was produced from germinated rye grains and whey and the effluent was separated into two streams: the protein-rich solid fraction, to be used as animal feed, and the liquid fraction, which can be co-digested with clover grass silage to produce biogas. The effluent from the anaerobic digestion process was assumed to serve as natural... |
| Tipo: Journal paper |
Palavras-chave: Technology assessment; Post harvest management and techniques. |
| Ano: 2011 |
URL: http://orgprints.org/19007/2/19007.pdf |
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| Thomsen, Anne Belinda; Arvaniti, Efthalis; Xu, Jian; Oleskowicz-Popiel, Piotr; Frenqvist, Tomas; Schultz-Jensen, Nadja; Kádár, Zsófia; Jensen, Morten; Thomsen, Sune T.; Thygessen, Anders. |
| Pretreatment technologies for production of 2G bioethanol from agricultural waste and crops |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Post harvest management and techniques. |
| Ano: 2010 |
URL: http://orgprints.org/19020/2/19020.pdf |
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| Kádár, Zsófia; Oleskowicz-Popiel, Piotr; Schmidt, Jens Ejbye; Thomsen, Anne Belinda. |
| Organic agriculture is one sustainable alternative to avoid the negative environmental effects often caused by conventional agriculture. BioConcens is an interdisciplinary project aims at developing new biorefinery concept and processes for co-production of bioethanol, biogas and animal feed based on resources from organic agriculture (clover grass, straw) and associated food processing (whey). Bioenergy produced in organic agriculture can reduce its dependency of fossil fuels and decrease greenhouse-gas emission, and at the same time it is important that carbon and nutrients cycle are not influenced negatively. Biogas can be produced from any carbon rich waste/by-product, which can be further utilized in combined heat and power plant to produce heat and... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Post harvest management and techniques. |
| Ano: 2009 |
URL: http://orgprints.org/19023/2/19023.pdf |
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| Kádár, Zsófia; Christensen, Anne Deen; Thomsen, Mette Hedegaard; Thomsen, Anne Belinda. |
| The malting in brewing process develops enzymes that are required to hydrolyze the complex starch in grain into simple fermentable sugars. These proceed the three following steps: Steeping encourages germination to start, germination prepares the conversion of the starch to sugars, and kilning stops the germination. In this study, a method for bioethanol production from rye grain was developed by utilizing the inherent amylase activity from germination of the seed. Grain germination was performed in two steps (steeping, germination) under different conditions, where the effect of temperature, duration and humidity was examined on amylase activity and final ethanol yield. Commercial enzymes were used for reference experiments. Simultaneous... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Post harvest management and techniques. |
| Ano: 2009 |
URL: http://orgprints.org/19026/2/19026.pdf |
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| Christensen, Anne Deen; Kádár, Zsófia; Oleskowicz-Popiel, Piotr; Thomsen, Mette Hedegaard. |
| Ethanol production by K. marxianus in whey from organic cheese production was examined in batch and continuous mode. The results showed that no pasteurization or freezing of the whey was necessary and that K. marxianus was able to compete with the lactic acid bacteria added during cheese production. The results also showed that, even though some lactic acid fermentation had taken place prior to ethanol fermentation, K. marxianus was able to take over and produce ethanol from the remaining lactose, since a significant amount of lactic acid was not produced (1–2 g/l). Batch fermentations showed high ethanol yield (*0.50 g ethanol/g lactose) at both 30ºC and 40ºC using low pH (4.5) or no pH control. Continuous fermentation of nonsterilized whey was performed... |
| Tipo: Journal paper |
Palavras-chave: Post harvest management and techniques. |
| Ano: 2010 |
URL: http://orgprints.org/19014/4/19014.pdf |
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