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Valorisation De Co Produits Agro Industriels Pour La Production De Charbons Actifs Vegetaux
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Book Synopsis Valorisation de co-produits agro-industriels pour la production de charbons actifs végétaux by : Karim Tabet
Download or read book Valorisation de co-produits agro-industriels pour la production de charbons actifs végétaux written by Karim Tabet and published by . This book was released on 2003 with total page 237 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ce travail s'inscrit dans la minimisation et la valorisation de résidus agro-industriels de paille et de son sous forme de charbon actif (CA). Après une phase d'optimisation à l'échelle laboratoire permettant la sélection des paramètres d'activation / carbonisation, nous avons pu élaborer des CA performants et avons précisé l'influence des conditions opératoires sur leur structure poreuse. Nous avons utilisé l'ATG pour établir le rôle de l'activant dans le développement de la porosité. Au cours de l'extrapolation de la production à l'échelle pilote, nous avons établi que la présence des gaz de pyrolyse est indispensable à l'obtention de CA performants et montré que le CO2 est directement responsable de la formation de la porosité. Enfin, nous avons établi que la décoloration des sirops de sucres dépend du volume des mésopores compris entre 4 nm et 12 nm. En testant nos CA en captation des pesticides, nous avons montré que le volume microporeux conditionne leur adsorption.
Book Synopsis Co-valorisation de déchets lignocellulosiques en tant qu'adsorbants appliqués en dépollution aqueuse et production de chaleur par combustion by : Elloe Martin Boizi
Download or read book Co-valorisation de déchets lignocellulosiques en tant qu'adsorbants appliqués en dépollution aqueuse et production de chaleur par combustion written by Elloe Martin Boizi and published by . This book was released on 1999 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les charbons actifs sont des matières carbonées ayant subi un traitement chimique et/ou physique spécifique leur conférant une porosité très développée, et par conséquent un certain pouvoir adsorbant. Le modèle industriel de production de charbons actifs passe nécessairement par une phase dite d'activation qui demande un investissement lourd engendré non seulement par la complexité des installations mais aussi par la spécificité des procédés. L’étude consiste à utiliser des matières premières peu onéreuses (résidus d'exploitations agricoles, taillis à courte rotation) pour la production de charbons ayant des propriétés requises pour une application en traitement d'eau usée et cela sans recours aux procédés d'activation. Afin de palier à une moindre efficacité par rapport aux charbons actifs commerciaux et dans un souci de rendre la filière bien plus attractive, la faisabilité de la dégradation thermique des polluants, associée à celle d'une récupération de l'énergie des charbons ont été étudiées. Des charbons végétaux sont produits par pyrolyse conventionnelle simple. Une étude de l'influence des paramètres de traitement a été réalisée, en vue d'une maximisation de la capacité des produits à adsorber des polluants aqueux. Le pouvoir adsorbant de ces matières carbonées activées (MCA) obtenues, est caractérisé par la surface spécifique et les indices (d'adsorption) d'iode et de bleu de méthylène. Des tests d'abattement de polluants modèles ou réels ont permis d'estimer les performances des MCA en dépollution d'effluents réels. Les résultats obtenus montrent que les charbons de bois, produits par pyrolyse conventionnelle ont des performances approximativement moitié de celles des charbons actifs commerciaux destinés au traitement en milieu aqueux. La co-valorisation par combustion des MCA consiste à incinérer les polluants pièges via un mélange tri-phasique solide/liquide/gaz (mousse chargée en charbon pollué). L'énergie ainsi générée peut être utilisée à d'autres fins. Les essais réalisés dans ce sens ont permis d'atteindre des niveaux élevés de solide dans la mousse et une destruction quasi-totale des polluants adsorbés. Les approches économiques réalisées à partir d'étude de cas réels, aussi bien pour la production que pour l'utilisation des MCA (en dépollution et génération d'énergie), affichent des résultats prometteurs.
Book Synopsis Valorisation de sous-produits végétaux par fermentation pour la production de composés à valeur ajoutée by : Justine Godard
Download or read book Valorisation de sous-produits végétaux par fermentation pour la production de composés à valeur ajoutée written by Justine Godard and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les enjeux de développement durable et de gestion des déchets sont de plus en plus considérés dans nos sociétés. Dans ce contexte, il est nécessaire de développer des recherches dans le but d'enrichir les connaissances scientifiques, et permettre de développer des systèmes de valorisation efficients. Parmi les voies de valorisation pour le recyclage des sous-produits végétaux, issus de l'industrie agroalimentaire, la fermentation peut être utilisée pour la production de métabolites à valeur ajoutée. Le projet dans le cadre duquel j'ai préparé ma thèse a été mené avec l'appui de cinq industriels du secteur agroalimentaire qui souhaitaient travailler sur la valorisation spécifique de leurs sous-produits végétaux : Charles et Alice, Florette, Panzani, Philibert Savours et Pierre Martinet. Les sous-produits associés sont respectivement des peaux de pommes, des épluchures de salades, du son de blé, du levain de germe de blé et de la pulpe de carottes. Dans un premier temps, des caractéristiques physico-chimiques (pH, teneur en eau, aw), biochimiques (acidité titrable, fractions azotées), et biologiques (flores microbiennes des produits bruts) de chacune de ces 5 matrices ont été déterminées. Couplé à des essais de fermentation spontanée, les résultats ont dans un premier temps permis de sélectionner une matrice de référence, la pulpe de carottes. La fermentation spontanée des sous-produits a été étudiée en faisant varier les paramètres d'incubation, selon un plan d'expérience factoriel, pour la matrice modèle. Les observations réalisées ont permis de sélectionner les conditions de fermentation des quatre autres sous-produits. Les mesures d'acidité (pH et acidité titrable) et le suivi de flores microbiennes au cours du temps ont montré la fermentescibilité des sous-produits. Pour la pulpe de carotte, les paramètres de culture choisis (broyage, température, pourcentage d'eau et rafraîchis) et les niveaux fixés, n'ont pas permis de favoriser la production de molécules d'intérêt parmi celles suivies : les composés phénoliques, les acides organiques et les composés volatils. En accord avec les partenaires du projet, la troisième partie avait pour objectif de sélectionner une souche de Lactobacillus, à partir de la matrice modèle, pour produire de l'acide L-lactique. La souche de Lactobacillus paracasei A1L sélectionnée a montré sa capacité à produire de l'acide L-lactique dans des quantités plus importantes qu'en fermentation spontanée, bien que celles-ci restent faibles pour envisager une application industrielle (quantité maximale produite = 0,974 g/L). Les essais réalisés selon un plan d'expérience D-optimal ont permis d'évaluer les effets de la température, du pH, de l'ajout d'enzymes (hémicellulase et protéase) et du taux d'ensemencement. Les résultats montrent que la production d'acide L-lactique est favorisée à une température de 25°C, un pH initial de 8 et une quantité de microorganismes ensemencée de 10E+8 UFC/mL. Au terme du projet, les connaissances acquises sur les dynamiques de fermentation, spontanée ou dirigée, sont des éléments qui permettront d'adapter les conditions de fermentation.
Author :Agence de l'environnement et de la maîtrise de l'énergie (France). Publisher : ISBN 13 :9782868172181 Total Pages :75 pages Book Rating :4.1/5 (721 download)
Book Synopsis Les coproduits d'origine végétale des industries agroalimentaires by : Agence de l'environnement et de la maîtrise de l'énergie (France).
Download or read book Les coproduits d'origine végétale des industries agroalimentaires written by Agence de l'environnement et de la maîtrise de l'énergie (France). and published by . This book was released on 2000 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Solid State Fermentation by : S. Roussos
Download or read book Advances in Solid State Fermentation written by S. Roussos and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 641 pages. Available in PDF, EPUB and Kindle. Book excerpt: G.HAINNAUX Departement Milieu et Activites Agricoles, Centre ORSTOM, 911 Avenue d' Agropolis, B.P. 5045, 34032 Montpellier Cedex , France. Solid state fermentation, popularly abbreviated as SSF, is currently investigated by many groups throughout the world. The study of this technique was largely neglected in the past in European and Western countries and there is now a high demand for SSF, meaning in food, environment, agricultural, phannaceutical and many other biotechnological applications. It gives me satisfaction to note that the importance of this technique was realised at my department way back in 1975 since then, our team has put concentrated efforts on developing this technique. xvii Foreword Advances in Solid State Fermentation Foreword M. PUYGRENIER Agropolis Valorisation, Avenue d' Agropolis, 34394 Montpellier Cedex 5, France. On the name of the Scientific Community, I would like to express the wish that this International Symposium on SSF should be successful. Solid State Fermentation is part of biotechnology research. It consists on seeding solid culture medium with bacteria or fungi (filamentous or higher) and on producing, in this medium (solid components and exudates) metabolites and high value products. In fact, this process is very old. In older industries such the food and agricultural, this technique has been extensively used. An example of this is the production of pork sausages and Roquefort cheese. Pharmaceutical industry could make extensive use of SSF in the production of secondary metabolites of many kinds and development in this direction is soon expected.
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9789251039809 Total Pages :40 pages Book Rating :4.0/5 (398 download)
Book Synopsis Risk Management and Food Safety by : Food and Agriculture Organization of the United Nations
Download or read book Risk Management and Food Safety written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 1997 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Risk analysis is widely recognised as the fundamental methodology underlying the development of food safety standards. As recognised in the 1995 consultation, risk analysis is composed of three separate but integrated elements, namely risk assessment, risk management and risk communication. That consultation recognised risk communication as an interactive process of exchange of information and opinion on risk among risk assessors, risk managers, and other interested parties. Risk management is defined within Codex as the process of weighing policy alternatives in the light of the results of risk assessment and, if required, selecting and implementing appropriate control options, including regulatory measures. The outcome of the risk management process, as undertaken by Committees within the Codex Alimentarius system, is the development of standards, guidelines and other recommendations for food safety, m the national situation it is likely that different risk management decisions could be made according to different criteria and different ranges of risk management options. The overall objective of Codex is to ensure consumer protection and to facilitate international trade.
Book Synopsis Bananas and Food Security by : Claudine Picq
Download or read book Bananas and Food Security written by Claudine Picq and published by Bioversity International. This book was released on 1999 with total page 806 pages. Available in PDF, EPUB and Kindle. Book excerpt: Importance de la banane sur les plans economique et alimentaire; Diversite et dynamique des filieres; Organisation des marches et commercialisation; Systemes de productions/production systems.
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Book Synopsis Basic Technics in Ecological Farming / Techniques de Base en Agriculture Biologique / Grundsätzliche Verfahren der ökologischen Landwirtschaft / Le Maintien de la Fertilité des Sols / The Maintenance of Soil Fertility / Die Erhaltung der Bodenfruchtbarkeit by : Stuart Hill
Download or read book Basic Technics in Ecological Farming / Techniques de Base en Agriculture Biologique / Grundsätzliche Verfahren der ökologischen Landwirtschaft / Le Maintien de la Fertilité des Sols / The Maintenance of Soil Fertility / Die Erhaltung der Bodenfruchtbarkeit written by Stuart Hill and published by Birkhäuser. This book was released on 2013-12-14 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :International Livestock Research Institute Publisher :ILRI (aka ILCA and ILRAD) ISBN 13 :9789291460038 Total Pages :268 pages Book Rating :4.4/5 (6 download)
Book Synopsis Livestock Policy Analysis by : International Livestock Research Institute
Download or read book Livestock Policy Analysis written by International Livestock Research Institute and published by ILRI (aka ILCA and ILRAD). This book was released on 1995-01-01 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: Policy concepts; Identification of policy issues; Production systems, supply and demand; Market, price and trade policies; Marketing and distribution systems; Budget and manpower planning; Land tenure police for the livestock sector; Policy analysis report writing and communication; Livestock production and marketing in alphabeta - a case study.
Book Synopsis Biogas from Waste and Renewable Resources by : Dieter Deublein
Download or read book Biogas from Waste and Renewable Resources written by Dieter Deublein and published by John Wiley & Sons. This book was released on 2008-04-18 with total page 469 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written as a practical introduction to biogas plant design and operation, this book fills a huge gap by presenting a systematic guide to this emerging technology -- information otherwise only available in poorly intelligible reports by US governmental and other official agencies. The author draws on teaching material from a university course as well as a wide variety of industrial biogas projects he has been involved with, thus combining didactical skill with real-life examples. Alongside biological and technical aspects of biogas generation, this timely work also looks at safety and legal aspects as well as environmental considerations.
Book Synopsis 2nd Pan-African Symposium on the Sustainable Use of Natural Resources in Africa by : Bihini won wa Musiti
Download or read book 2nd Pan-African Symposium on the Sustainable Use of Natural Resources in Africa written by Bihini won wa Musiti and published by IUCN. This book was released on 2003 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: This bilingual publication results from a four-day symposium aimed at capturing the general directions and analytical issues that characterize approaches to sustainable use in Africa. The papers included in this work are organized under four major headings: modes of use, devolution, scale issues and external issues. Authors explore these themes through the use of case studies and the description of specific regional experiences. External issues are further explored in a series of commissioned policy papers which have also been included.
Book Synopsis Biomethanization of the Organic Fraction of Municipal Solid Wastes by : J. Mata-Alvarez
Download or read book Biomethanization of the Organic Fraction of Municipal Solid Wastes written by J. Mata-Alvarez and published by IWA Publishing. This book was released on 2002-08-31 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biomethanization of the Organic Fraction of Municipal Solid Wastes is a comprehensive introduction to both the fundamentals and the more practical aspects of the anaerobic digestion of organic solid wastes, particularly those derived from households, that is, the organic fraction of municipal solid wastes (OFMSW). It can be used as a textbook for specialized courses and also as a guide for practitioners. In the first part, the book covers the relevant aspects of anaerobic digestion (AD) of organic wastes. The fundamentals and kinetic aspects of AD are reviewed with particular emphasis on the aspects related to solid wastes. This introduction is necessary to have a comprehensive view of the AD process and to understand the practical principles as well as the origin of possible problems arising from the management of the process. Chapter 2 emphasizes the role of kinetics in designing the reactor, paying special attention to existing models, particularly the dynamic ones. Through this introduction, it is intended to facilitate the technology transfer from laboratory or pilot plant experiences to full-scale process, in order to implement improvements in current digesters. Laboratory methods are described for the analysis and optimization of reactor performance, such as methanogenic activity tests or experimental evaluation of the biodegradation kinetics of solid organic waste. The different reaction patterns applied to industrial reactors are outlined. Industrial reactors are classified in accordance with the system they use, pointing out advantages and limitations. Co-digestion, enabling the co-treatment of organic wastes of different origin in a more economically feasible way, is described in detail. Examples of co-digestion are given, with OFMSW as a base-substrate. Finally, full-scale co-digestion plants are discussed. Various types (mechanical, biological, physico-chemical) of pre-treatment to increase the biodegradability, and thus the yields of the process, are reviewed in detail. The use of the fermentation products of anaerobic digesters for biological nutrient removal processes in wastewater treatment plants is described. This constitutes an example of integrated waste management, a field in which both economic and technical advances can be achieved. Balances are given to justify the approach, and a full-scale case study is presented. The important topic of economics and the ecological advantages of the process are emphasized. The use of compost, the integration with composting technology, and advantages over other technologies are detailed in the framework of an environmental impact assessment of biowaste treatment. Finally, the anaerobic digestion of MSW in landfills is reviewed in detail, with emphasis on landfill process enhancement and strategies for its application.
Book Synopsis The Microbiology of Anaerobic Digesters by : Michael H. Gerardi
Download or read book The Microbiology of Anaerobic Digesters written by Michael H. Gerardi and published by John Wiley & Sons. This book was released on 2003-09-19 with total page 189 pages. Available in PDF, EPUB and Kindle. Book excerpt: Anaerobic digestion is a biochemical degradation process that converts complex organic material, such as animal manure, into methane and other byproducts. Part of the author's Wastewater Microbiology series, Microbiology of Anareboic Digesters eschews technical jargon to deliver a practical, how-to guide for wastewater plant operators.
Book Synopsis Pesticide Manual by : British Crop Protection Council
Download or read book Pesticide Manual written by British Crop Protection Council and published by . This book was released on 1971 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Struggle for the Long-Term in Transnational Science and Politics by : Jenny Andersson
Download or read book The Struggle for the Long-Term in Transnational Science and Politics written by Jenny Andersson and published by Routledge. This book was released on 2015-04-10 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reconsiders the power of the idea of the future. Bringing together perspectives from cultural history, environmental history, political history and the history of science, it investigates how the future became a specific field of action in liberal democratic, state socialist and post-colonial regimes after the Second World War. It highlights the emergence of new forms of predictive scientific expertise in this period, and shows how such forms of expertise interacted with political systems of the Cold War world order, as the future became the prism for dealing with post-industrialisation, technoscientific progress, changing social values, Cold War tensions and an emerging Third World. A forgotten problem of cultural history, the future re-emerges in this volume as a fundamentally contested field in which forms of control and central forms of resistance met, as different actors set out to colonise and control and others to liberate. The individual studies of this book show how the West European, African, Romanian and Czechoslovak "long term" was constructed through forms of expertise, computer simulations and models, and they reveal how such constructions both opened up new realities but also imposed limits on possible futures.
Download or read book Exportateur Americain written by and published by . This book was released on 1912 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
