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Dissertations / Theses on the topic 'Lignocellulose bioconversion'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Ghizzi, Damasceno da Silva Gabriela. "Fractionnement par voie sèche de la biomasse ligno-cellulosique : broyage poussé de la paille de blé et effets sur ses bioconversions." Thesis, Montpellier, SupAgro, 2011. http://www.theses.fr/2011NSAM0031/document.

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Dans le contexte de la bioraffinerie végétale pour la production de molécules et d'énergie, des prétraitements sont nécessaires pour augmenter la réactivité de la biomasse ligno-cellulosique. Cette thèse s'insère dans une thématique dont l'objectif général est d'établir les bases d'une raffinerie du végétal par des procédés par voie sèche. Cette étude a pour objectif de développer et comprendre le fractionnement mécanique poussé de la paille de blé jusqu'à des tailles sub-millimétriques et d'évaluer les effets sur des procédés de bioconversions énergétiques. La paille de blé présente une grand

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2

Barron, Niall. "Studies on the bioconversion of cellulosic substrates by the thermotolerant yeast, Kluyveromyces marxianus IMB3 at 45degC." Thesis, University of Ulster, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267684.

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3

Rojas, Ortúzar Ilse. "Bioconversion Of Lignocellulosic Components Of Sweet Sorghum Bagasse Into Fermentable Sugars." Diss., The University of Arizona, 2015. http://hdl.handle.net/10150/555836.

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The utilization of lignocellulosic residues to produce renewable energy is an interesting alternative to meet the increasing demand of fuels while at the same time reducing greenhouse gas emissions and climate change. Sweet sorghum bagasse is a lignocellulosic residue composed mainly of cellulose, hemicellulose, and lignin; and it is a promising substrate for ethanol production because its complex carbohydrates may be hydrolyzed and converted into simple sugars, and then fermented into ethanol. However, the utilization of lignocellulosic residues is difficult and inefficient. Lignocellulose is

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4

Chang, Chen-Wei. "Bioconversion of sugarcane bagasse and soybean hulls for the production of a generic microbial feedstock." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/bioconversion-of-sugarcane-bagasse-and-soybean-hulls-for-the-production-of-a-generic-microbial-feedstock(0144bdd8-5444-468d-9f0f-50613a79be67).html.

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Lignocellulose, mostly from agricultural and forestry resources, is a potential renewable material for sustainable development of biorefineries. From previous studies, reducing sugar production through biological pretreatment involves two steps: solid-state fermentation (SSF) for delignification, followed by enzymatic hydrolysis by adding celluloytic enzymes (cellulase and xylanase etc.). In the process described in this thesis, the necessary enzymes are produced in-situ and the hydrolysis proceeds directly after the solid-state fermentation. Enzyme hydrolysis releases free amino nitrogen (FAN

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5

Meyrial, Valérie. "Bioconversion des glucides majeurs dérivés des lignocelluloses en éthanol : relation entre les flux de protons traversant la membrane plasmique et la tolérance à l'éthanol de Pichia stipitis." Lyon 1, 1996. http://www.theses.fr/1996LYO19003.

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Pichia stipitis peut produire de l'ethanol a partir du xylose issu des lignocelluloses. Cependant, cette conversion est limitee par la faible tolerance a l'ethanol de ce type de levures. Aussi, ont ete etudies les mecanismes d'inhibition par l'ethanol, en particulier les flux de protons traversant la membrane plasmique. Les protons traversent la membrane plasmique selon deux directions opposees: entree passive et excretion active. Pour p. Stipitis les vitesses des flux de protons, ainsi que leur alteration en presence d'ethanol, dependent du substrat carbone catabolise. L'influx apparent de pr

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6

Nguyen, Tien Cuong. "In-situ and ex-situ multi-scale physical metrologies to investigate the destructuration mechanisms of lignocellulosic matrices and release kinetics of fermentescible cellulosic carbon." Thesis, Toulouse, INSA, 2014. http://www.theses.fr/2014ISAT0036/document.

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La bioconversion des biomasses lignocellulosiques est actuellement un grand défi pour le développement de technologies de bio-raffinage. Le manque de connaissances des mécanismes de liquéfaction et de saccharification est l’un des principaux facteurs qui pénalisent le développement des procédés de bio-raffinage. Ce travail est centré sur le développement d’analyses physiques et biochimiques in-situ (viscosimétrie, focus beam reflectance measurement) et ex-situ (rhéometrie, granulométrie laser, morphogranulométrie, sédimentation…) pour améliorer la compréhension des mécanismes de déstructuratio

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7

Kumi, Philemon James. "Improving the bioconversion of lignocellulosic feedstock to bio-fuels and chemicals." Thesis, University of South Wales, 2015. https://pure.southwales.ac.uk/en/studentthesis/improving-the-bioconversion-of-lignocellulosic-feedstock-to-biofuels-and-chemicals(7088d092-fb93-4d70-ba3d-1abb233e33e3).html.

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This study investigated the fate of lignocellulosic biomass (wheat-feed and perennial rye grass) in different anaerobic digestion systems, evaluating the role of substrate specificity on the pattern of degradation. The two-stage (biohydrogen-biomethane) anaerobic system was found to be more effective in the degradation of lignocellulose, when compared to the conventional single-stage system. The perennial rye grass substrate possessed about 21% higher holocellulose concentration when compared to the wheat-feed; its exploitation in the acidogenic digestion was however poor, resulting in a 2.9%

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8

Kim, Tae Hyun Lee Yoon Y. "Bioconversion of lignocellulosic material into ethanol pretreatment, enzymatic hydrolysis, and ethanol fermentation /." Auburn, Ala., 2004. http://repo.lib.auburn.edu/EtdRoot/2004/FALL/Chemical_Engineering/Dissertation/KIM_TAE_24.pdf.

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9

Mukhopadhyay, Achira. "Bioconversion of paper mill lignocellulosic materials to lactic acid using cellulase enzyme complex and microbial cultures." Thesis, Manhattan, Kan. : Kansas State University, 2009. http://hdl.handle.net/2097/2332.

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10

Agu, Chidozie Victor Agu. "Use of process design and metabolic engineering to enhance bioconversion of lignocellulosic biomass and glycerol to biofuels." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1480590331055825.

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11

Arnold, Stefanie [Verfasser], and Rudolf [Akademischer Betreuer] Hausmann. "Evaluation of bio-oil produced from fast pyrolysis of lignocellulosic biomass as carbon source for bacterial bioconversion / Stefanie Arnold ; Betreuer: Rudolf Hausmann." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2020. http://d-nb.info/1215756119/34.

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12

Soares, Laís Américo. "Bioconversão anaeróbia do bagaço de cana-de-açúcar em produtos de valor biotecnológico em condição termofílica e mesofílica." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-27092017-103405/.

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Nessa pesquisa foram testados separadamente dois inóculos solo/compostagem e lodo termofílico de reator anaeróbio de manta de lodo e fluxo ascendente (UASB) do tratamento de vinhaça em relação ao potencial de produção de compostos de valor agregado a partir do bagaço de cana-de-açúcar (BCA) em reatores em batelada em condição mesofílica e termofílica, respectivamente. Pré-tratamentos térmico, ácido e diluição seriada foram aplicados ao inóculo termofílico, como tentativa de inibir as arqueias metanogênicas. A diluição seriada foi o pré-tratamento aplicado em ambos os inóculos, mesofílico e ter

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13

Scheufele, Fabiano Bisinella. "Bioconversão de resíduos agroindustriais por micro-organismos do bioma amazônico produtores de enzimas lignocelulolíticas." Universidade Estadual do Oeste do Parana, 2012. http://tede.unioeste.br:8080/tede/handle/tede/1906.

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Made available in DSpace on 2017-07-10T18:08:19Z (GMT). No. of bitstreams: 1 Fabiano Bisinella Scheufele.pdf: 1716907 bytes, checksum: fee6288858ac3d92f0d2e7f9f8d02ba2 (MD5) Previous issue date: 2012-02-15<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>Lignocellulosic biomass has high yields of cellulose which can be hydrolyzed to fermentable carbohydrates. Global generation of agro-industrial wastes grows simultaneously with the sector development resulting at the accumulation of lignocellulosic residues leading environmental pollution and loss of potential materials f

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14

"Engineering Cellular Transport Systems to Enhance Lignocellulose Bioconversion." Doctoral diss., 2018. http://hdl.handle.net/2286/R.I.50438.

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abstract: Lignocellulosic biomass represents a renewable domestic feedstock that can support large-scale biochemical production processes for fuels and specialty chemicals. However, cost-effective conversion of lignocellulosic sugars into valuable chemicals by microorganisms still remains a challenge. Biomass recalcitrance to saccharification, microbial substrate utilization, bioproduct titer toxicity, and toxic chemicals associated with chemical pretreatments are at the center of the bottlenecks limiting further commercialization of lignocellulose conversion. Genetic and metabolic engineering

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15

Chandrakant, Priya. "Simultaneous bioconversion of glucose and xylose in lignocellulose hydrolyzate to ethanol." Thesis, 1999. http://localhost:8080/xmlui/handle/12345678/2732.

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16

Richardson, Terri. "Strain improvement of Scheffersomyces stipitis for the bioconversion of lignocellulosic biomass into ethanol." Thesis, 2013. http://hdl.handle.net/10214/6624.

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Pretreatment of recalcitrant lignocellulosic biomass to release sugars for bioconversion into ethanol produces fermentation inhibitors. Increasing yeast inhibitor tolerance should reduce production time and cost. UV mutagenesis followed by genome shuffling using cross mating was performed on Scheffersomyces stipitis strain GS301, a genome shuffled strain with increased tolerance to spent sulphite liquor (SSL). The main fermentation inhibitors in SSL are acetic acid, hydroxymethylfurfural (HMF), and various phenolics. UV mutagenesis resulted in acetic acid tolerant mutants, but they were pheno

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17

Obnamia, Jon Albert. "Modeling the Reaction Kinetics of the Enzymatic Hydrolysis of Lignocellulosic Biomass." Thesis, 2014. http://hdl.handle.net/1807/65594.

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Maximizing enzymatic hydrolysis performance can be achieved through the combination of experimental work and modeling. The present work utilizes an enzymatic hydrolysis model based on reaction kinetics, Langmuir adsorption isotherms, and product inhibition of enzymes (β-glucosidase, cellobiohydrolase, and endoglucanase). The model was developed from a 10% w/w corn stover system. Glucose yield sensitivity to changes in parameter values was assessed and linked to biomass and enzyme characteristics. A commercial enzyme cocktail (CEC) was subsequently characterized by FPLC and gel electrophoresis

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18

Awosusi, Ayotunde Ayokunle. "Bioconversion of waste lignocellulosic biomass (South African corn cob) to succinic acid in molten hydrate solvent system." Thesis, 2018. https://hdl.handle.net/10539/25888.

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A thesis submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, Johannesburg in fulfillment of the requirement for the degree of Doctor of Philosophy in Engineering April 2018<br>Lignocellulosic biomass (LCB) resources are central to modern, sustainable development of economies worldwide. They are abundant, cheap and do not contribute to net CO2 emissions hence their refinement for energy and valuable industrial commodities production provides a necessary alternative to crude oil. LCB have been used as solid fuels since the paleolithic ages.

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19

Feliciano, Angelo Alexandre Silva. "Bioconversão integrada de lamas celulósicas em etanol: alterações processuais para o aumento da produtividade." Master's thesis, 2015. http://hdl.handle.net/10316/40251.

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Dissertação de Mestrado Integrado em Engenharia Química apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra<br>Nas últimas décadas, a temperatura média global tem vindo a crescer devido à alteração da composição atmosférica resultante da queima dos combustíveis fósseis. De forma a reduzir a poluição ambiental e o consumo de petróleo, têm sido estudado diversos combustíveis alternativos, como o bioetanol. O bioetanol consiste no biocombustível mais utilizado no sector dos transportes, sendo a sua produção a partir de resíduos lenho-celulósicos uma das mais promissor

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