Modélisation et simulation dynamique du couplage bioréaction-filtration PDF Download

Author: Joël Genty
Publisher:
ISBN:
Category :
Languages : fr
Pages : 176

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Book Description
Le couplage d'un bioréacteur et d'un système de filtration tangentielle est étudié. Une modélisation approfondie du procédé a été effectuée en tenant compte des paramètres biologiques et des variables de procédé. Il a ainsi été établi un système différentiel de 28 équations à 44 variables pour un ensemble représentatif des différents types d'installations couplant bioréacteur et système membranaire. Un logiciel a été programmé en langage C et en Visual Basic sous l'environnement Windows d'un PC 386, et permet de calculer ou de visualiser l'évolution dynamique de tous les débits et concentrations intervenant dans le procédé. Grace à cet outil, nous avons comparé des données bibliographiques expérimentales et des simulations dynamiques. Des essais de fermentation continue de bière ont aussi été effectués en bioréacteur à membrane et ont été confrontés aux résultats de simulation. Cette validation de la modélisation a ainsi été conduite sur 8 cas expérimentaux (3 en fermentation alcoolique et 5 en fermentation lactique). Il en ressort que l'écart par rapport aux calculs est du même ordre de grandeur que l'erreur expérimentale. Le simulateur dynamique possède un bon pouvoir prédictif et demeure cohérent avec les résultats expérimentaux.

Author: Jérome Jacob
Publisher:
ISBN:
Category :
Languages : fr
Pages : 170

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Book Description
LE SUJET DE CETTE THESE CONCERNE LA SIMULATION DYNAMIQUE DES BIOFILTRES (PROCEDES AUX MULTIPLES AVANTAGES, DE PLUS EN PLUS UTILISES DANS LES STATIONS D'EPURATION, VIS A VIS DES PROCEDES A BOUES ACTIVEES). DANS LA PREMIERE PARTIE DE LA THESE EST ELABORE UN MODELE DYNAMIQUE GENERAL DE BIOFILTRE IMMERGE, PRENANT EN COMPTE LES ASPECTS BIOLOGIQUES (ELIMINATION DES POLLUTIONS CARBONEES ET AZOTEES, CROISSANCE DE LA BIOMASSE), PHYSIQUES (FILTRATION DES MATIERES EN SUSPENSION) ET HYDRODYNAMIQUES (ECOULEMENT LIQUIDE PISTON, COLMATAGE DU FILTRE). LE MODELE, CONCU SOUS UNE FORME GENERALE, PEUT ETRE UTILISE EN ELIMINATION DE CARBONE, DENITRIFICATION, NITRIFICATION, DENITRITATION IL CONDUIT A UN SYSTEME D'EQUATIONS DIFFERENTIELLES PARTIELLES ET ALGEBRIQUES (EDPA) POUR LEQUEL EST MISE EN UVRE UNE TECHNIQUE DE RESOLUTION GLOBALE A MAILLAGE FIXE, DERIVEE D'UNE TECHNIQUE DE TYPE EDA (TRAITEMENT GLOBAL DES EQUATIONS DIFFERENTIELLES ET ALGEBRIQUES) AVEC IMPLANTATION D'UNE PROCEDURE AUTOMATIQUE DE TRAITEMENT DES EVENEMENTS TEMPORELS ET D'ETAT. LES PERFORMANCES DU MODELE, AINSI QUE L'EFFICACITE DE LA METHODE NUMERIQUE, SONT TESTEES EN SIMULATION DYNAMIQUE SUR DIFFERENTES APPLICATIONS AVEC COMPARAISON SYSTEMATIQUE VIS A VIS DE DONNEES OBTENUES SUR PILOTE (DENITRIFICATION D'UNE EAU RESIDUAIRE URBAINE, DENITRITATION D'UNE EAU SYNTHETIQUE, DENITRIFICATION D'UNE EAU A POTABILISER) CE QUI A CONDUIT A DEVELOPPER CERTAINS DE SES ASPECTS: INTEGRATION DU NOUVEAU CONCEPT DE BIOMASSE ACTIVE/BIOMASSE DESACTIVEE, DISSOCIATION DE L'AZOTE OXYDE EN NITRATES ET NITRITES, PRISE EN COMPTE DE LA TEMPERATURE. UNE ETUDE RIGOUREUSE DU DEMARRAGE DU FILTRE (ETAPE TRANSITOIRE GENERALEMENT OCCULTEE EN SIMULATION DYNAMIQUE) A EGALEMENT ETE EFFECTUEE. UNE PROCEDURE D'IDENTIFICATION, SPECIALEMENT ADAPTEE AUX SYSTEMES DE TYPE EDA, A ETE IMPLANTEE SUR LE MODELE AFIN D'ACCEDER A CERTAINS PARAMETRES BIOLOGIQUES QUI NE PEUVENT ETRE DETERMINES EXPERIMENTALEMENT

Author: G. A. Ekama
Publisher: International Water Assn
ISBN: 9781900222037
Category : Science
Languages : en
Pages : 216

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Book Description
The secondary settling tank (SST) plays a major ro

Author: Sandip Mazumder
Publisher: Academic Press
ISBN: 0128035048
Category : Mathematics
Languages : en
Pages : 484

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Book Description
Numerical Methods for Partial Differential Equations: Finite Difference and Finite Volume Methods focuses on two popular deterministic methods for solving partial differential equations (PDEs), namely finite difference and finite volume methods. The solution of PDEs can be very challenging, depending on the type of equation, the number of independent variables, the boundary, and initial conditions, and other factors. These two methods have been traditionally used to solve problems involving fluid flow. For practical reasons, the finite element method, used more often for solving problems in solid mechanics, and covered extensively in various other texts, has been excluded. The book is intended for beginning graduate students and early career professionals, although advanced undergraduate students may find it equally useful. The material is meant to serve as a prerequisite for students who might go on to take additional courses in computational mechanics, computational fluid dynamics, or computational electromagnetics. The notations, language, and technical jargon used in the book can be easily understood by scientists and engineers who may not have had graduate-level applied mathematics or computer science courses. - Presents one of the few available resources that comprehensively describes and demonstrates the finite volume method for unstructured mesh used frequently by practicing code developers in industry - Includes step-by-step algorithms and code snippets in each chapter that enables the reader to make the transition from equations on the page to working codes - Includes 51 worked out examples that comprehensively demonstrate important mathematical steps, algorithms, and coding practices required to numerically solve PDEs, as well as how to interpret the results from both physical and mathematic perspectives

Author: Jan Theodoor Henrard
Publisher:
ISBN:
Category : Aristida
Languages : en
Pages : 236

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Author: Mária Németh Lenke
Publisher:
ISBN:
Category : American drama
Languages : en
Pages : 164

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Book Description

Author: L M M Tijskens
Publisher: Woodhead Publishing
ISBN: 9781855735651
Category : Business & Economics
Languages : en
Pages : 516

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Book Description
Food process modelling provides an authoritative review of one of the most exciting and influential developments in the food industry. The modelling of food processes allows analysts not only to understand such processes more clearly but also to control them more closely and make predictions about them. Modelling thus aids the search for greater and more consistent food quality. Written by a distinguished international team of experts, Food process modelling covers both the range of modelling techniques and their practical applications across the food chain.

Author: Jamie Davies
Publisher:
ISBN: 019884154X
Category :
Languages : en
Pages : 137

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Book Description
Written primarily for mid-to-upper level undergraduates, this primer will introduce students to topics at the forefront of the subject that are being applied to probe biological problems, or to address the most pressing issues facing society. These topics will include those that form thecornerstone of contemporary research, helping students to make the transition to active researcher.This primer introduces the challenges and opportunities of applying synthetic biological techniques to mammalian cells, tissues, and organisms. It covers the special features that make engineering mammalian systems different from engineering bacteria, fungi, and plants, and provides an overview ofcurrent techniques. A variety of cutting-edge examples illustrate the different purposes of mammalian synthetic biology, including pure biomedical research, drug production, tissue engineering, and regenerative medicine.

Author: Debabrata Das
Publisher: Springer
ISBN: 3319667939
Category : Technology & Engineering
Languages : en
Pages : 508

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Book Description
This book represents a novel attempt to describe microbial fuel cells (MFCs) as a renewable energy source derived from organic wastes. Bioelectricity is usually produced through MFCs in oxygen-deficient environments, where a series of microorganisms convert the complex wastes into electrons via liquefaction through a cascade of enzymes in a bioelectrochemical process. The book provides a detailed description of MFC technologies and their applications, along with the theories underlying the electron transfer mechanisms, the biochemistry and the microbiology involved, and the material characteristics of the anode, cathode and separator. It is intended for a broad audience, mainly undergraduates, postgraduates, energy researchers, scientists working in industry and at research organizations, energy specialists, policymakers, and anyone else interested in the latest developments concerning MFCs.

Author: Laure Beyala
Publisher: Elsevier
ISBN: 0081023723
Category : Medical
Languages : en
Pages : 186

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Book Description
Connected objects today present a range of opportunities in medicine. We live in a new digital era where the monitoring and analysis of one's own health information no longer belongs solely to the realm of science fiction. The success of these new devices resides in their usage, which integrates seamlessly into the daily life of the user in order to continually collect the maximum amount of data. These medical connected devices therefore constitute a new hope in transforming user experience as well as the care pathway. They offer a better level of support and a better quality of life for those suffering from chronic illnesses or mental, sensorial or physical disabilities. However, these solutions also pose systematic problems, especially regarding the risks linked to their usage. This book presents a cartography which clearly details all the potential risk scenarios linked to the usage of connected devices as well as the actions which should be undertaken to promote balanced governance and guarantee the development of high-quality medical devices. - Aims to help the reader understand the difference between a connected object and a medical connected device - Identifies and evaluates all the potential risks and perspectives associated with the use of connected medical devices - Shows how to make a comprehensive risk analysis with standards like ISO 31000 and 14971