Recherche

Bastian Christèle

Intervenant-e externe

Compétences principales

Intervenant-e externe

HES-SO Valais-Wallis - Haute Ecole d'Ingénierie
Rue de l'Industrie 23, 1950 Sion, CH

Domaine
Chimie et sciences de la vie

Filière principale
Technologies du vivant

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Terminés

Biofuel Cell Power Supply for Portable and Stationary Applications

AGP

Rôle: Collaborateur/trice

Requérant(e)s: VS - Institut Technologies du vivant, Fischer Fabian, VS - Institut Technologies du vivant

Financement: HES-SO Rectorat

Description du projet : Electric power is produced by a stacked microbial fuel cell from biomass. The generated electricity is transformed with minimal loss by a transformer developed for this purpose. The resulting bio-power supply is tested for electricity production. It will be implemented as microbial fuel cell for waste water treatment. With this processing technology energy cost is estimated to be cut in half. Moreover used water plants become net balance energy producer.

Equipe de recherche au sein de la HES-SO: Steiner Amandus , Fischer Fabian , Bastian Christèle , Chappuis Thierry , Hautier Serge , Mabillard Eric , Silvestri Anne-Claire

Partenaires académiques: 425 - Oenologie; VS - Institut Technologies du vivant; FR - EIA - ICHIMIE - Chimie industrielle et appliquée; Fischer Fabian, VS - Institut Technologies du vivant

Durée du projet: 01.09.2010 - 29.02.2012

Montant global du projet: 130'200 CHF

Statut: Terminé

Application of plastoglobule technology to cosmetic and nutritional products

AGP

Rôle: Collaborateur/trice

Requérant(e)s: HES-SO Valais-Wallis, Grogg Alain François, HES-SO Valais-Wallis

Financement: Université de Neuchâtel

Description du projet : Application of plastoglobule technology to cosmetic and nutritional products

Equipe de recherche au sein de la HES-SO: Bastian Christèle

Partenaires académiques: HES-SO Valais-Wallis; Grogg Alain François, HES-SO Valais-Wallis

Durée du projet: 15.03.2006 - 01.04.2009

Statut: Terminé

Développement d'un produit d'alimentation pour poissons à base de farine d'algues

AGP

Rôle: Collaborateur/trice

Requérant(e)s: VS - Institut Technologies du vivant, Grogg Alain François, VS - Institut Technologies du vivant

Financement: Ichthys Ltd

Description du projet : Développement d'un produit d'alimentation pour poissons à base de farine d'algues. - étude préliminaire du comportement des produits - plan d'expériences réduit afin de maîtriser les paramètres-clef - production en fonction de la taille des pellets - mise en place d'une analytique ad hoc

Equipe de recherche au sein de la HES-SO: Amoos Serge , Bastian Christèle , Bocquel Dimitri

Partenaires académiques: VS - Institut Technologies du vivant; Grogg Alain François, VS - Institut Technologies du vivant

Durée du projet: 15.08.2007 - 31.12.2008

Montant global du projet: 16'000 CHF

Statut: Terminé

2012

Bio-inspired chemical hydrogen storage and discharge as a source of electrical energy

Article scientifique ArODES

Fabian Fischer, Sophie Mermoud, Gnagna Diouf, Christèle Bastian

Journal of Applied Electrochemistry, 2012, vol. 42, pp. 419-425

Lien vers la publication

Résumé:

Reversible bio-inspired chemical hydrogen storage systems accumulate electrical energy in the form of electrons and proton ions located on biomolecules or bio-like storage molecules. Electro-active biomolecules (EAB) in Yeast media show such behavior: 2e− + 2H+ + EAB+(aq) ⇆ EABH/H+(aq) also electro-active Methylene Blue (MB): 2e− + 2H+ + MB +(aq) ⇆ MBH/H +(aq). The power characteristics of microbial fuel cell stacks equipped with such bio-inspired hydrogen storage systems were examined. E. coli cultures charged these bio-inspired separate chemical hydrogen storage units up to E = 0.50 ± 0.06 V; cell potentials increased proportionally in serial double, triple, and quadruple hydrogen storage stacks up to E OCV = 1.98 V; the maximum power densities that were obtained improved proportionally with stack length by an increment of 1.4. The bio-inspired chemical hydrogen storage principle is of great interest for application in low-cost batteries that store renewable energy.

2011

Microbial fuel cell enables phosphate recovery from digested sewage sludge as struvite

Article scientifique ArODES

Fabian Fischer, Christèle Bastian, Manuel Happe, Eric Mabillard, Nicolas Schmidt

Bioresource Technology, 2011, vol. 102, no. 10, pp. 5824-5330

Lien vers la publication

Résumé:

Orthophosphate was mobilized from iron phosphate (FePO4) contained in digested sewage sludge by microbial fuel cell power. FePO4 was reduced through electrons and protons obtained from metabolic activity of Escherichia coli. The process yielded up to 82% or 600 mg/l. Optical emission spectroscopy was used for phosphate dosage. 31P NMR showed a singlet at δp = 3.72 ppm indicating that orthophosphate (H3PO4, HPO-4, HPO2-4 and PO3-4) was recovered. The phosphate containing supernatant solution was reacted with stoichiometric amounts of MgCl2 and NH4OH to precipitate struvite (MgNH4PO4·6H2O). The crystalline fertilizer was analyzed by scanning electron microscopy comprising elemental analysis, revealing a composition accuracy of ∼90% and the absence of any toxic metals such as As, Cd, Pb, or Cr. The phosphate extraction is also a means to reduce the volume of digested sewage sludge while increasing the heat of combustion. This study represents a concept for sustainable decentralized phosphate recycling.

2009

Ionic liquid-coated immobilized lipase for the synthesis of methylglucose fatty acid esters

Article scientifique ArODES

Julien Mutschler, Thierry Rausis, Jean-Marc Bourgeois, Christèle Bastian, Daniel Zufferey, Isabelle Vanessa Mohrenz, Fabian Fischer

Green Chemistry, 2009, vol. 11, pp. 1793-1800

Lien vers la publication

Résumé:

A homologous series of biosurfactants has been synthesized by a novel sustainable biotransformation technique and compared with three other enzymatic processes. 6-O-Alkanoyl-methyl-α-D-glucopyranosides were obtained by lipase mediated esterification of methyl-α-D-glucopyranoside with capric acid C10:0, lauric acid C12:0, myristic acid C14:0, palmitic acid C16:0, and oleic acid C18:1. Solvent free transformations were compared with the use of ionic liquids and organic solvents. The lipase from Candida antarctica B, immobilized on macroporous acrylic acid beads (Novozyme 435), was employed either untreated or coated with small amounts of ionic liquids. This resulted in superior efficiencies (80%) with 1-butyl-4-methylpyridine hexafluorophosphate [4bmpy][PF6] and broader substrate tolerance in comparison to solvent free transformation. The results show a positive correlation with increasing polarity of the ionic liquids used as liquid film-coating, which was in opposition to the use of the same ionic liquid as solvent. The analysis of the ionic liquid film coated catalyst carriers was performed by optical and scanning electron microscopy (SEM).

Réalisations

Recherche

Bastian Christèle

Intervenant-e externe

Compétences principales

Ingénierie chimique

santé au travail

Analyse de risques

Environnement

Formation d'adultes

Intervenant-e externe