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| Registros recuperados: 26 | |
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| Kiyohara,Pedro K.; Lima,Urgel de Almeida; Santos,Helena de Souza; Santos,Persio de Souza. |
| Alumina channeled beads and rough surface membranes prepared from aqueous sols of fibrillar pseudoboehmite are able to immobilize yeasts for ethanol fermentation of sugar solutions. This paper describes comparative results of assays carried out with yeasts immobilized onto alpha-alumina beads and membranes prepared under two different conditions of processing and firing. The fermentation tests evaluated by the decrease of fermentable sugars, referred as Brix degrees per hour, indicated that the yeasts immobilized on beads had similar performance, probably because their surfaces, even being morphologically different, presented the same value of open porosity. One type of membrane (asymmetrical; precursor: pseudoboehmite; firing temperature 1,150ºC; crystal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Porous alumina; Channeled alumina; Immobilized yeast; Ethanol production. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000200008 |
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| Oda, Y; Nakamura, K; Shinomiya, N; Ohba, K; 小田, 有二. |
| Kluyveromyces marxianus KD-15, called flex yeast, is a strain that is insensitive to catabolite repression and has the capacity to produce ethanol efficiently from a mixture of beet molasses and whey powder. When a fermentation test was conducted in 50 mL of a medium containing 200 mg mL-1 of sugar as sugar beet thick juice diluted with an arbitrary amount of crude whey, strain KD-15 produced over 99 mg mL-1 ethanol in all the media tested, and ethanol formation decreased in proportion to the volume of whey by K. marxianus NBRC 1963, the parental strain of KD-15, and Saccharomyces cerevisiae NBRC 0224, the reference strain for conventional ethanol production. Fermentation of thick juice diluted with whey alone by strain KD-15 at 30 °C initially proceeded... |
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Palavras-chave: Ethanol production; Flex yeast; Kluyveromyces marxianus; Beta vulgaris; Cheese whey. |
| Ano: 2010 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/3143 |
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| Lambert, Dayton M.; Wilcox, Michael D.; English, Alicia; Stewart, Lance A.. |
| The location of ethanol plants is determined by infrastructure, product and input markets, fiscal attributes of local communities, and state and federal incentives. This empirical analysis uses probit regression along with spatial clustering methods to analyze investment activity of ethanol plants at the county level for the lower U.S. 48 states from 2000 to 2007. The availability of feedstock dominates the site selection decision. Other factors, such as access to navigable rivers or railroads, product markets, producer credit and excise tax exemptions, and methyl tertiary-butyl ether bans provided some counties with a comparative advantage in attracting ethanol plants. |
| Tipo: Journal Article |
Palavras-chave: Cluster analysis; Comparative advantage; Ethanol production; Location model; Community/Rural/Urban Development; Environmental Economics and Policy; Political Economy; R1; R3. |
| Ano: 2008 |
URL: http://purl.umn.edu/45511 |
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| Mendonca, Marco Aurelio Alves de; Freitas, Rogerio Edivaldo; Santos, Amaro Olimpio Pereira Dos; Pereira, Andre Santos; Costa, Ricardo Cunha Da. |
| O PROALCOOL é conhecido internacionalmente com o programa mais bem sucedido de promoção de biocombustíveis. A análise da eficácia de tal programa é fundamental para formulação de políticas públicas, não somente na área de energia, mas em todos os setores da economia. Com este objetivo, o artigo utilizou a metodologia das curvas de aprendizagem para avaliar o PROALCOOL e mostrar o esforço necessário, em termos de investimentos, para o seu avanço.----------------------PROALCOOL is known internationally as the most successful biofuel promotion program. Prior analysis of the effectiveness of such a program is fundamental to formulation of public policy, not only in the area of energy, but in all sectors of the economy. The article applies learning curve... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Produção de álcool; Promoção de biocombustíveis; Curva de aprendizagem; Ethanol production; Promotion of biofuels; Learning curves; Resource /Energy Economics and Policy. |
| Ano: 2008 |
URL: http://purl.umn.edu/108140 |
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| Yan,Shoubao; Yao,Jianming; Yao,Liming; Zhi,Zhijun; Chen,Xiangsong; Wu,Jingyong. |
| The enzymatic hydrolysis of food waste by commercially available enzymes and the subsequent ethanol fermentation of the hydrolysates by Saccharomyces cerecisiae H058 were studied in this work. The optimum batch enzymatic conditions were found to be saccharification pH of 4.5, temperature of 55!, glucoamylase concentration of 120 u/g, α-amylase concentration of 10 u/g, solid-liquid ratio of 1: 0.75 (w/w). Fed batch hydrolysis process was started with a solid-liquid ratio of 1: 1 (w/w), with solid food waste added at time lapse of 2 h to get a final solid-liquid ratio of 1: 0.5 (w/w). After 4 h of reaction, the reducing sugar concentration reached 194.43 g/L with a enzymatic digestibility of 93.12%. Further fermentation of the batch and fed batch enzymatic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Food waste; Enzymatic hydrolysis; Hydrolysates; Fermentation; Ethanol production. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000200002 |
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| Techaparin,Atiya; Thanonkeo,Pornthap; Klanrit,Preekamol. |
| Abstract The application of high-potential thermotolerant yeasts is a key factor for successful ethanol production at high temperatures. Two hundred and thirty-four yeast isolates from Greater Mekong Subregion (GMS) countries, i.e., Thailand, The Lao People's Democratic Republic (Lao PDR) and Vietnam were obtained. Five thermotolerant yeasts, designated Saccharomyces cerevisiae KKU-VN8, KKU-VN20, and KKU-VN27, Pichia kudriavzevii KKU-TH33 and P. kudriavzevii KKU-TH43, demonstrated high temperature and ethanol tolerance levels up to 45 °C and 13% (v/v), respectively. All five strains produced higher ethanol concentrations and exhibited greater productivities and yields than the industrial strain S. cerevisiae TISTR5606 during high-temperature fermentation... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Thermotolerant yeast; Box-Behnken experimental design; Response surface method; Ethanol production; Sweet sorghum juice (SSJ). |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000300461 |
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| Susanto, Dwi; Rosson, C. Parr, III; Hudson, Darren. |
| This study analyzes the potential impacts of expanded ethanol production on southern agriculture. Results of regression analysis suggest that acreage planted for field crops (corn, cotton, soybeans, and wheat) is inelastic with respect to relative prices. The results provide statistical evidence of potential significant acreage shifts favoring corn over cotton, soybeans, and wheat. Simulations indicate that higher corn prices will increase corn acreage, but the South continues to be a deficit corn region. U.S. corn production is capable of supplying domestic demand for ethanol, feed for livestock and poultry, and other uses, while maintaining exports at more than 2 billion bushels annually. |
| Tipo: Journal Article |
Palavras-chave: Acreage shifts; Corn exports; Ethanol production; Southern agriculture; Agribusiness; Environmental Economics and Policy; Production Economics; Research and Development/Tech Change/Emerging Technologies; Q11; Q42. |
| Ano: 2008 |
URL: http://purl.umn.edu/47200 |
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| Registros recuperados: 26 | |
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