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Registros recuperados: 6
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Biohydrogen production by Thermoanaerobacterium thermosaccharolyticum KKU-ED1: Culture conditions optimization using mixed xylose/arabinose as substrate Electron. J. Biotechnol.
Saripan,Arunsri Fangkum; Reungsang,Alissara.
Background: Biological hydrogen production by microorganisms can be divided into two main categories i.e. photosynthetic organisms that produce hydrogen using light as energy source and anaerobic bacteria that produce hydrogen via dark fermentation. Dark fermentative hydrogen production by anaerobic bacteria has the advantages of a higher HPR without illumination and of the capability to convert various kinds of substrate. Results: Thermophilic hydrogen producer was isolated from elephant dung and identified as Thermoanaerobacterium thermosaccharolyticum KKU-ED1 by 16S rRNA gene analysis, which was further used to produce hydrogen from mixed pentose sugar i.e., xylose/arabinose. The optimum conditions for hydrogen production from mixed xylose/arabinose by...
Tipo: Journal article Palavras-chave: Arabinose; Biohydrogen; Elephant dung; Hydrolysate; Thermophilic; Xylose.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000100001
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Buffering action of acetate on hydrogen production by Ethanoligenens harbinense B49 Electron. J. Biotechnol.
Xu,Ji-Fei; Mi,Yuan-Ting; Ren,Nan-Qi.
The buffering effect of acetate on hydrogen production during glucose fermentation by Ethanoligenens harbinense B49 was investigated compared to phosphate, a widely used fermentative hydrogen production buffer. Specific concentrations of sodium acetate or phosphate were added to batch cultures, and the effects on hydrogen production were comparatively analyzed using a modified Gompertz model. Adding 50 mM acetate or phosphate suppressed the hydrogen production peak and slightly extended the lag phase. However, the overall hydrogen yields were 113.5 and 108.5 mmol/L, respectively, and the final pH was effectively controlled. Acetate buffered against hydrogen production more effectively than did phosphate, promoting cell growth and preventing decreased pH....
Tipo: Journal article Palavras-chave: Acetate; Biohydrogen; Buffering action; Ethanoligenens harbinense phosphate.
Ano: 2016 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582016000500002
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Effect of temperature and initial pH on biohydrogen production from palm oil mill effluent: long-term evaluation and microbial community analysis Electron. J. Biotechnol.
O-Thong,Sompong; Mamimin,Chonticha; Prasertsan,Poonsuk.
Anaerobic sludge from palm oil mill effluent (POME) treatment plant was used as a source of inocula for the conversion of POME into hydrogen. Optimization of temperature and initial pH for biohydrogen production from POME was investigated by response surface methodology. Temperature of 60ºC and initial pHof 5.5 was optimized for anaerobic microflora which gave a maximum hydrogen production of 4820 ml H2/l-POME corresponding to hydrogen yield of 243 ml H2/g-sugar. Total sugar consumption and chemical oxygen demand (COD) removal efficiency were 98.7% and 46%, respectively. Long-term hydrogen production in continuous reactor at HRT of 2 days, 1 day and 12 hrs were 4850 ± 90, 4660 ± 99 and 2590 ± 120 ml H2/l-POME, respectively. Phylogenetic analysis of the...
Tipo: Journal article Palavras-chave: Biohydrogen; Long-term evaluation; Palm oil mill effluent; Response surface methodology; Thermophilic condition.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000500009
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Feasibility of biohydrogen production from industrial wastes using defined microbial co-culture Biol. Res.
Chen,Peng; Wang,Yuxia; Yan,Lei; Wang,Yiqing; Li,Suyue; Yan,Xiaojuan; Wang,Ningbo; Liang,Ning; Li,Hongyu.
BACKGROUND: The development of clean or novel alternative energy has become a global trend that will shape the future of energy. In the present study, 3 microbial strains with different oxygen requirements, including Clostridium acetobutylicum ATCC 824, Enterobacter cloacae ATCC 13047 and Kluyveromyces marxianus 15D, were used to construct a hydrogen production system that was composed of a mixed aerobic-facultative anaerobic-anaerobic consortium. The effects of metal ions, organic acids and carbohydrate substrates on this system were analyzed and compared using electrochemical and kinetic assays. It was then tested using small-scale experiments to evaluate its ability to convert starch in 5 L of organic wastewater into hydrogen. For the one-step...
Tipo: Journal article Palavras-chave: Renewable Energy; Biohydrogen; Microbial consortium; Hydrogen.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602015000100024
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Genome sequence of the H2-producing Clostridium beijerinckii strain Br21 isolated from a sugarcane vinasse treatment plant Genet. Mol. Biol.
Fonseca,Bruna Constante; Riaño-Pachón,Diego Mauricio; Guazzaroni,María-Eugenia; Reginatto,Valeria.
Abstract We report on the nearly complete genome sequence of Clostridium beijerinckii strain Br21, formerly isolated from a sugarcarne vinasse wastewater treatment plant. The resulting genome is ca. 5.9 Mbp in length and resembles the size of previously published C. beijerinckii genomes. We annotated the genome sequence and predicted a total of 5323 genes. Strain Br21 has a genetic toolkit that allows it to exploit diverse sugars that are often found after lignocellulosic biomass pretreatment to yield products of commercial interest. Besides the whole set of genes encoding for enzymes underlying hydrogen production, the genome of the new strain includes genes that enable carbon sources conversion into butanol, ethanol, acetic acid, butyric acid, and the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Clostridium; Biofuels; Biohydrogen; Beta-glucosidase.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000100139
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Profiling carbohydrate composition, biohydrogen capacity, and disease resistance in potato Electron. J. Biotechnol.
Diez-de-Medina Roldán,Sergio; Silva,Herman; Jeblick,Wolfgang; Nowik,Isabella; Modigell,Michael; Neuhaus,H. Ekkehard; Conrath,Uwe.
Background: Potato (Solanum tuberosum) is one of the most important sources of carbohydrates in human diet. Because of its high carbohydrate levels it recently has also received attention in biohydrogen production. To exploit the natural variation of potato with respect to resistance to major diseases, carbohydrate levels and composition, and capacity for biohydrogen production we analyzed tubers of native, improved, and genetically modified potatoes, and two other tuberous species for their glucose, fructose, sucrose, and starch content. Results: High-starch potato varieties were evaluated for their potential for Caldicellulosiruptor saccharolyticus-mediated biohydrogen production with Desirée and Rosita varieties delivering the highest biohydrogen...
Tipo: Journal article Palavras-chave: Biohydrogen; Caldicellulosiruptor saccharolyticus; Carbohydrates; Natural variation; Phytophthora infestans; Potato.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000600002
Registros recuperados: 6
Primeira ... 1 ... Última
 

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