References of "Richel, Aurore"
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See detailAspects stratégiques de la valorisation de la biomasse en Wallonie: innover pour la qualité ?
Richel, Aurore ULg

Conference (2016)

Le bioraffinage se définit comme l'art de valoriser la biomasse (végétale) en diverses applications relevant du secteur des "bioproduits", de l'énergie, des biocarburants, etc. La biomasse végétale est l ... [more ▼]

Le bioraffinage se définit comme l'art de valoriser la biomasse (végétale) en diverses applications relevant du secteur des "bioproduits", de l'énergie, des biocarburants, etc. La biomasse végétale est l'argument décisionnel le plus important dans la viabilité économique, la compétitivité et l'originalité des approches menées à l'heure actuelle. Cet exposé fait ainsi le point sur les grandes tendances en innovation concernant la biomasse et sa valorisation. Sont ainsi illustrés: 1) la sélection variétale en agriculture pour l'extraction de molécules pharmaceutiques; 2) la sélection de nouvelles espèces pour la production de caoutchouc naturel; 3) la valorisation des déchets verts et de jardinage; 4) le design de nouvelles approches de gestion et transformation des herbes de tonte; 5) la production de nouveaux biocarburants, notamment pour l'automobile et l'aviation civile, au départ des déchets municipaux solides; 7) la production de nouveaux matériaux pour le packaging (alimentaire) au départ de biomasse végétale et des déchets. [less ▲]

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See detailL’utilisation de l’hydrolyse enzymatique pour la production de nanocellulose dans une stratégie de bioraffinage forestier intégré (Synthèse Bibliographique)
Bombeck, Pierre-Louis ULg; Hebert, Jacques ULg; Richel, Aurore ULg

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment [=BASE] (2016), 20(1), 94-103

Introduction. In a world that seeks to break free from petrochemicals, the concept of forest biomass biorefinery is increasingly being studied as a way to maximize the value of the components of this ... [more ▼]

Introduction. In a world that seeks to break free from petrochemicals, the concept of forest biomass biorefinery is increasingly being studied as a way to maximize the value of the components of this biomass. Due to the high added value expected when transforming cellulose fibers into nanocellulose, this technology is highly attractive to the pulp and paper industrial world. <br />Literature. The concept of integrated forest biorefinery is to adapt existing pulp mills so as to maximize the value of the co-products. Through the use of various methods, two types of nanocellulose may be obtained from the cellulose in the pulp. Due to its production of valuable byproducts, enzymatic hydrolysis is an interesting method to use for this purpose, but it must be combined with mechanical post-treatments. The production of nanocellulose from chemical pulp takes place in the final step of pulp production, and could be implemented without modifying the existing mills. The economic viability of this mode of production and the potential market size are the subject of recent studies that appear encouraging. <br />Conclusions. Nanocellulose is a promising biomaterial whose field of application continues to grow. Cellulose in wood pulp can be used as a raw material for the production of nanocellulose using enzymatic pre-treatments that generate valuable co-products. This process can be integrated into a conventional chemical pulp mill and constitutes a broadening of the products available to the pulp and paper industry. [less ▲]

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See detailIndividual lignocellulosic components as raw materials for the biobased sector: strategic innovations in the Belgian context
Berchem, Thomas ULg; Istasse, Thibaut ULg; Richel, Aurore ULg

Scientific conference (2016)

The southern region of Belgium (Wallonia) has been selected by the European Commission to be a bioeconomic “model demonstrator region”. This designation ensures adequate financial support for the ... [more ▼]

The southern region of Belgium (Wallonia) has been selected by the European Commission to be a bioeconomic “model demonstrator region”. This designation ensures adequate financial support for the development of production of sustainable chemicals. At the University of Liège, the Laboratory of Biological and Industrial Chemistry, which is recognized as a Center of Excellence in Biorefining and Green Technologies, is engaged in R&D with a strong partnership with the industrial sector. With unique pilot facilities, this Laboratory is able to perform prototyping and demonstration for the conversion of an array of biomasses. Local raw (lignocellulosic) materials are emphasized. This talk will describe two specific topics developed in our laboratory, from fundamentals to industrial applications. Lignin: toward high-value-added applications (Ir. Thomas Berchem) Lignin, the most abundant natural aromatic biopolymer, demonstrates high added value potential as an alternative to fossil resources for the production of a wide range of bioproducts and molecules for the chemical sector because of its unique aromatic structure. In Wallonia, two providers of lignins have been identified: the pulping industry and the agricultural sector (mostly as by-products from cereals). Profitable applications of lignins were few in Belgium before 2010 and development of new technologies were needed to exploit the full potential of this promising resource. Several projects led by our Laboratory and aiming to extract and upgrade lignin in high-value-added industrial applications (surface active agents, electric dispersants, components for waterproofing membranes, flame retardants, etc.) are proposed herein. These projects are strongly supported by grants from the Belgian chemical sector. Production of furan-based compounds for the plastics industry (Ir. Thibaut Istasse) Belgium is world-class innovator for chemicals and plastics. It is notably innovative in the production of bioplastics, mostly for packaging). Combined with strong European regulations (e.g. REACh), the substitution of some petrochemical-based monomers by biobased alternatives is strongly favored. In this context, the production of furans derivatives is studied starting from several local biomasses. In particular, our Laboratory has emphasized the potential of hydrothermal treatments and aqueous acid-catalyzed processes as key industrial steps for an economically viable production of these furanic platform chemicals. [less ▲]

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See detailSphingolipids: promising lipid-class molecules with potential applications for industry. A review
Miazek, Krystian ULg; Lebecque, Simon ULg; Hamaïdia, Malik ULg et al

in Biotechnologie, Agronomie, Société et Environnement = Biotechnology, Agronomy, Society and Environment (2016), (20(S1)), 321-336

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See detailLignin degradation and stability: Volatile Organic Compounds (VOCs) analysis throughout processing
Sallem-Idrissi, N.; Vanderghem, C.; Pacary, T. et al

in Polymer Degradation and Stability (2016), 130

This work investigates the Volatile Organic Compounds (VOCs) emissions during the processing of composite of polyamide 6 (PA) bio-filled with technical lignin. This is of prime interest as volatile ... [more ▼]

This work investigates the Volatile Organic Compounds (VOCs) emissions during the processing of composite of polyamide 6 (PA) bio-filled with technical lignin. This is of prime interest as volatile phenolic structural monomers issued from lignin could penetrate the human organism and cause undesirable health damages. A special attention is given to the measurement of formaldehyde as it is known to be a human carcinogen. Lignin main identified emission consists of a high level of formaldehyde and a large amount of complex substituted phenol and benzene, all representative and constitutive of its structure. Regarding the PA alone, it has been found that the predominant VOC product is ϵ-caprolactam. When filling PA6 with lignin, the emitted VOCs associated to this filler are mainly produced during the extrusion while, only traces are detected during the injection process. Formaldehyde emission level is three times higher during the injection than during the extrusion. Phenols and some remaining reactants used during industrial cellulosic extraction process are identified. Regarding the value of the Short-Term Exposure Limit (STEL), suitable industrial process, safety and hygiene rules must be adopted. © 2016 Elsevier Ltd. All rights reserved. [less ▲]

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See detailMonitoring the laccase reaction of vanillin and poplar hydrolysate
Sòti, Valentin; Jacquet, Nicolas ULg; Apers, Sandra et al

in Journal of Chemical Technology & Biotechnology (2016), 91(6), 1914-1922

BACKGROUND: Laccase is an intensively researched enzyme for industrial use. Except for decolorisation measurements, HPLC analysis is the conventional method for monitoring the phenolic removal during ... [more ▼]

BACKGROUND: Laccase is an intensively researched enzyme for industrial use. Except for decolorisation measurements, HPLC analysis is the conventional method for monitoring the phenolic removal during laccase enzyme reaction. This paper reports an investigation of the continuous UV absorbance follow-up of the laccase reaction with steam pretreated poplar hydrolysate. RESULTS: Vanillin was used as a model substrate and lignocellulose xylose rich fraction (XRF) as a biologically complex substrate for laccase detoxification. The reaction was followed by HPLC-UV as well as by UV spectrometric measurements. Results suggest that the reaction can be successfully monitored by measuring the change of UV absorbance at 280 nm, without previous compound separation. In case of XRF experiments the spectrophotometric follow-up is especially useful, as HPLC analysis takes a long time and provides less information than in case of single substrates. The method seems to be suitable for optimization and process control. CONCLUSION: The obtained results can help to construct a fast, easy and straightforward monitoring system for laccase-phenolic substrate reactions. [less ▲]

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See detailMetabolic profile of mixed culture acidogenic fermentation of lignocellulosic residues and the effect of upstream substrate fractionation by steam explosion
Perimenis, Anastasios; van Aarle, Ingrid; Nicolay, Thomas et al

in Biomass Conversion and Biorefinery (2016), 6

Lignocellulosic biomass residues have attracted attention for the sustainable production of molecules for material and energetic use through biochemical conversion. Their recalcitrant structure prevents a ... [more ▼]

Lignocellulosic biomass residues have attracted attention for the sustainable production of molecules for material and energetic use through biochemical conversion. Their recalcitrant structure prevents a broader use and asks for the development of sustainable techniques that can efficiently separate, recover and valorize the constituting components. In a cascading concept, residual streams of such processes can be further exploited in an attempt to valorize the largest possible fraction of the initial material. Three lignocellulosic substrates, namely dried sugar beet pulp, wheat bran and miscanthus straw, were upstream fractionated by steam explosion to extract the hemicellulose fraction. This study evaluated the valorization of the residual solid fraction through mixed acidogenic fermentation for the production of volatile fatty acids (VFA) as platform chemicals. Batch experiments have been conducted for the reference material (non-treated) and the solid fraction remaining after steam explosion, with and without the addition of an external mixed inoculum. Steam explosion residues contained less hemicellulose than the initial materials. The difference in the fermentation profile between steam explosion residues and non-treated substrates is dependent on the substrate. Maximum total VFA (tVFA) concentration was 18.8 gCOD/kgmixed_liquor, and maximum yield of chemical oxygen demand (COD) conversion into tVFAwas 33 % for the case of non-treated inoculated beet pulp. [less ▲]

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See detailSteam Explosion Process
Jacquet, Nicolas ULg; Haubruge, Eric ULg; Richel, Aurore ULg

Scientific conference (2015, December 17)

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See detailIndustrial Biological Chemistry laboratory activities
Jacquet, Nicolas ULg; Richel, Aurore ULg

Conference (2015, November 26)

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See detailEffect of Metals, Metalloids and Metallic Nanoparticles on Microalgae Growth and Industrial Product Biosynthesis: A Review
Miazek, Krystian ULg; Iwanek, Waldemar; Remacle, Claire ULg et al

in International Journal of Molecular Sciences (2015), 16

Microalgae are a source of numerous compounds that can be used in many branches of industry. Synthesis of such compounds in microalgal cells can be amplified under stress conditions. Exposure to various ... [more ▼]

Microalgae are a source of numerous compounds that can be used in many branches of industry. Synthesis of such compounds in microalgal cells can be amplified under stress conditions. Exposure to various metals can be one of methods applied to induce cell stress and synthesis of target products in microalgae cultures. In this review, the potential of producing diverse biocompounds (pigments, lipids, exopolymers, peptides, phytohormones, arsenoorganics, nanoparticles) from microalgae cultures upon exposure to various metals, is evaluated. Additionally, different methods to alter microalgae response towards metals and metal stress are described. Finally, possibilities to sustain high growth rates and productivity of microalgal cultures in the presence of metals are discussed. [less ▲]

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See detailLa chimie biologique industrielle à Gembloux Agro-Bio Tech : Un aperçu de nos activités
Berchem, Thomas ULg; Istasse, Thibaut ULg; Schmetz, Quentin ULg et al

Conference given outside the academic context (2015)

Présentation du laboratoire de Chimie Biologique Industrielle et illustration de nos principales activités; point sur les recherches de trois jeunes doctorants. Leur travail consiste en la valorisation de ... [more ▼]

Présentation du laboratoire de Chimie Biologique Industrielle et illustration de nos principales activités; point sur les recherches de trois jeunes doctorants. Leur travail consiste en la valorisation de matrice biologique (déchets agricoles, industriels et forestiers,...) pour produire une gamme de nouveaux produits, biocarburants ou molécules chimiques. [less ▲]

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See detailBioresources and circular economy - Strategic approach for Wallonia
Richel, Aurore ULg

Speech/Talk (2015)

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See detailValorisation de la biomasse pour des applications vers des marchés de niche
Richel, Aurore ULg

Conference (2015, October)

Dans le contexte économique actuel de notre société, il est reconnu que des alternatives et des compléments à la pétrochimie devront être développés dans un futur proche. L’une des solutions possibles ... [more ▼]

Dans le contexte économique actuel de notre société, il est reconnu que des alternatives et des compléments à la pétrochimie devront être développés dans un futur proche. L’une des solutions possibles réside dans le développement de procédés permettant de substituer les actuels produits pétro-sourcés par de nouveaux matériaux bio-basés issus de la biomasse. Sur base de ce constat, Gembloux Agro-Bio Tech et son laboratoire de Chimie Biologique Industrielle se positionnent sur cette thématique en abordant les aspects technico-économiques de transformation du végétal en une gamme de produits à haute valeur ajoutée à destination de divers secteurs applicatifs tels que les matériaux, le cosmétique, le pharmaceutique, etc. L'importance de l'agronomie et des techniques agricoles, combinée à une gestion appropriée des déchets en circuits courts, sont deux piliers discutés dans ce exposé et illustrés au travers de divers exemples stratégiques. [less ▲]

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See detailEt si nos déchets devenaient la source de nouveaux produits. Notion d'économie circulaire
Richel, Aurore ULg; Jacquet, Nicolas ULg; Berchem, Thomas ULg et al

Conference given outside the academic context (2015)

Description et illustration de nos activités visant à utiliser les déchets agricoles et forestiers, les déchets végétaux et industriels et nos déchets ménagers pour produire une gamme de nouveaux produits ... [more ▼]

Description et illustration de nos activités visant à utiliser les déchets agricoles et forestiers, les déchets végétaux et industriels et nos déchets ménagers pour produire une gamme de nouveaux produits, biocarburants ou molécules chimiques. Cette présentation se consacre aux nouveaux produits et polymères générés au départ de ces déchets dans une approche d'économie circulaire et de priorité des usages. [less ▲]

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See detailAlternatives to traditional valorisation ways for brewer’s spent grains
Villani, Nicolas ULg; Aguedo, Mario ULg; Richel, Aurore ULg

Poster (2015, August 05)

Brewer’s Spent Grains (BSG) are a highly available and cheap food supply chain waste (FSCW) that is mainly used in low-valued feed applications. This residue represents around 85 % of the total amount of ... [more ▼]

Brewer’s Spent Grains (BSG) are a highly available and cheap food supply chain waste (FSCW) that is mainly used in low-valued feed applications. This residue represents around 85 % of the total amount of waste produced by breweries with an annual tonnage of 3.4 million tons (on a dry basis) in the European Union. Based on its composition, BSG could be valorised in a wide variety of value-added products. For example, cellulose and remaining starch could easily be turned into ethanol or used as solid state fermentation media or as platform molecules for further chemical synthesis. These alternative valorisation ways could lead to an important economic relief through the whole brewery industry. Herein is described a multistep fractionation of BSG into cellulosic pulp, free sugars, proteins, germs and lignin using an Organosolv acidic pretreatment. This extraction procedure has been optimised in order to allow the most efficient and complete valorisation of BSG. [less ▲]

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See detailUrban biorefineries: a solution to manage and upgrade wastes in Wallonia ? Strategic aspects, proof-of-concept and industrial transfert
Richel, Aurore ULg

Scientific conference (2015, July)

“Urban biorefining” is an original concept aiming at using urban wastes (household wastes, municipal wastes, industrial liquid and/or solid residues and side-products, etc.), mainly of vegetal origin, for ... [more ▼]

“Urban biorefining” is an original concept aiming at using urban wastes (household wastes, municipal wastes, industrial liquid and/or solid residues and side-products, etc.), mainly of vegetal origin, for the production of an array of biofuels and bioproducts. This “urban biorefining” concept fits particularly with the economic, geographic and politic contexts and constraints of the Walloon Region (south part of Belgium). Indeed, Walloon Region is a very small territory (area of about 6,504 sq mi) with a temperate climate. Supply feedstock, mainly arising form forestry and agriculture, are thus rather restricted, submitted to importation, and subjected to non-standardized quality. Several examples of our regional strategy, still available on an industrial scale, are herein proposed and detailed. [less ▲]

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See detailWood Acid Hydrolysate as a Feedstock for Chlorella Growth
Miazek, Krystian ULg; Goffin, Dorothée ULg; Richel, Aurore ULg et al

Scientific conference (2015, June 24)

In this work, the effect of beech (Fagus sylvatica) wood acid hydrolysate on growth of Chlorella sorokin-iana was evaluated. Experiments carried out in this study show that neutralized wood acid ... [more ▼]

In this work, the effect of beech (Fagus sylvatica) wood acid hydrolysate on growth of Chlorella sorokin-iana was evaluated. Experiments carried out in this study show that neutralized wood acid hydrolysate can vastly improve Chlorella growth, due to the presence of organic carbon. However, simultaneously the suppression of Chlorella growth at the onset of cultivation was observed, presumably due to inhibitory substances, and this effect was more pronounced with the increase of hydrolysate dosage. Beech wood acid hydrolysate can be a valuable feedstock to stimulate Chlorella growth, on condition that inhibitory level of hydrolysate loading is avoided. [less ▲]

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