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Fermentative hydrogen production from agroindustrial lignocellulosic substrates BJM
Reginatto,Valeria; Antônio,Regina Vasconcellos.
To achieve economically competitive biological hydrogen production, it is crucial to consider inexpensive materials such as lignocellulosic substrate residues derived from agroindustrial activities. It is possible to use (1) lignocellulosic materials without any type of pretreatment, (2) lignocellulosic materials after a pretreatment step, and (3) lignocellulosic materials hydrolysates originating from a pretreatment step followed by enzymatic hydrolysis. According to the current literature data on fermentative H2 production presented in this review, thermophilic conditions produce H2 in yields approximately 75% higher than those obtained in mesophilic conditions using untreated lignocellulosic substrates. The average H2 production from pretreated material...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fermentation; Hydrogen; Lignocellulosic substrates; Pretreatment; Inhibitors.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000200323
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Energy generation in a Microbial Fuel Cell using anaerobic sludge from a wastewater treatment plant Scientia Agricola
Passos,Vinicius Fabiano; Aquino Neto,Sidney; Andrade,Adalgisa Rodrigues de; Reginatto,Valeria.
ABSTRACT In microbial fuel cells (MFCs), the oxidation of organic compounds catalyzed by microorganisms (anode) generates electricity via electron transfer to an external circuit that acts as an electron acceptor (cathode). Microbial fuel cells differ in terms of the microorganisms employed and the nature of the oxidized organic compound. In this study, a consortium of anaerobic microorganisms helped to treat the secondary sludge obtained from a sewage treatment plant. The microorganisms were grown in a 250 mL bioreactor containing a carbon cloth. The reactor was fed with media containing acetate (as the carbon source) for 48 days. Concomitantly, the electrochemical data were measured with the aid of a digital multimeter and data acquisition system. At the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microbial consortia; Anode; Power density; Effluent.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162016000500424
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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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