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Biodegradation Des Hydrocarbures En Milieu Poreux Insature
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Book Synopsis Biodégradation des hydrocarbures en milieu poreux insaturé by : Céline Gautier
Download or read book Biodégradation des hydrocarbures en milieu poreux insaturé written by Céline Gautier and published by . This book was released on 2007 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: L’évaluation de l’impact environnemental de coupes pétrolières complexes constitue un enjeu primordial. Pour ce faire, il est en effet nécessaire de disposer d'informations sur les évolutions à la fois cinétiques et compositionnelles de ces coupes hydrocarbonées dans l’environnement. Cette étude a eu pour objet d'étudier l’influence des principaux facteurs limitants "pressentis" sur la vitesse de dégradation d'un produit pétrolier en phase au sein d'un milieu poreux insaturé en eau, par des microflores issues de sols pollués par des hydrocarbures pétroliers. Une procédure expérimentale a été développée en utilisant des membranes céramiques microporeuses, permettant de contrôler la saturation/désaturation respective de l'eau et de l'huile dans le milieu poreux. Dans ces conditions trois phases eau/huile/air occupent le volume poral, avec, pour chacune de ces phases, une répartition homogène sur toute la hauteur de milieu poreux. On peut, dans une certaine limite, régler pour chaque phase, son pourcentage moyen d'occupation du volume poral. Cette procédure a été validée en étudiant la cinétique de dégradation de l'hexadécane apporté en faible quantité dans une phase HMN non biodégradable. La cinétique de dégradation a été suivie en respirométrie, permettant à la fois la mesure et la fourniture d'oxygène. Deux principaux facteurs physico-chimiques limitants "pressentis", c'est-à-dire la granulométrie, et la saturation à l'eau ont été évalués avec une phase hydrocarbure simulée, d'abord par de l'hexadécane en phase pure, puis par deux coupes pétrolières, un gazole et un gazole déaromatisé, également en phase pure. L'azote, introduit par le biais de la phase eau, a été utilisé pour régler la quantité de biomasse dans ce milieu poreux et a permis d'obtenir des informations sur les facteurs physico-chimiques qui étaient limitants et de les hiérarchiser en fonction des conditions de milieux poreux expérimentés. Des données chiffrées sur des potentialités de transferts d'oxygène et d'hydrocarbures, (hexadécane en particulier) dans ces milieux poreux insaturés ont pu être obtenues. Avec des coupes hydrocarbures complexes (gazole et gazole déaromatisé), la dégradation des composés récalcitrants et en particulier des composés saturés peu solubles intervient également comme facteur limitant.
Book Synopsis Suivi de la biodégradation des hydrocarbures par le couplage des mesures géophysiques électriques du sol (polarisation provoquée) et des analyses des gaz (concentration du CO 2 et isotopie du carbone) by : Cécile Noel
Download or read book Suivi de la biodégradation des hydrocarbures par le couplage des mesures géophysiques électriques du sol (polarisation provoquée) et des analyses des gaz (concentration du CO 2 et isotopie du carbone) written by Cécile Noel and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: La biodégradation stimulée est une méthode de dépollution in situ utilisée pour dégrader des hydrocarbures. Son suivi se fait actuellement via des forages coûteux et trop peu nombreux. Ce travail de thèse propose d'améliorer le suivi d'une biodégradation en combinant des méthodes géophysiques électriques (polarisation provoquée) et des analyses de CO2 (flux en surface et isotopie du carbone). Ces outils ont été testés à l'échelle du laboratoire, puis mis en œuvre sur un site pilote en cours de dépollution. La dégradation aérobie du toluène en colonnes par une souche bactérienne connue (Rhodococcus wratislaviensis) a été caractérisée par une production de CO2, un fractionnement isotopique du carbone, et par une évolution de la résistivité électrique complexe du milieu poreux, en corrélation avec les analyses microbiologiques et géochimiques. Ces résultats ont permis de mettre en place un suivi à l'échelle du terrain. Le site est une station-service où des fuites d'essences et de gasoil ont eu lieu il y a une quinzaine d'années. Une tranchée apporte de l'oxygène à la nappe pour stimuler les processus bactériens aérobies. Des campagnes géophysiques ainsi que des analyses de CO 2ont été réalisées à partir de février 2014. Les premiers résultats montrent une zone plus conductrice et plus chargeable qui correspond à la zone polluée définie par les analyses géochimiques en forages. De plus, au niveau de cette zone, de fortes émissions de CO2 ont été mesurées avec une signature isotopique caractéristique d'une biodégradation d'hydrocarbures. Ces résultats montrent l'intérêt de combiner des méthodes géophysiques avec des analyses de gaz pour surveiller des zones de biodégradation et d'ores-et-déjà, permettent de fournir une méthodologie non destructrice et originale de monitoring in situ.
Book Synopsis BIODEGRADATION DES HYDROCARBURES DANS LES MILIEUX SURSALES by : Maha Al Mallah
Download or read book BIODEGRADATION DES HYDROCARBURES DANS LES MILIEUX SURSALES written by Maha Al Mallah and published by . This book was released on 1988 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multidisciplinary approaches to food and foodways in the medieval Eastern Mediterranean by : Sylvie Yona Waksman
Download or read book Multidisciplinary approaches to food and foodways in the medieval Eastern Mediterranean written by Sylvie Yona Waksman and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Energy Density Materials by : Thomas M. Klapötke
Download or read book High Energy Density Materials written by Thomas M. Klapötke and published by Springer. This book was released on 2007-06-12 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The John Zink Combustion Handbook by : Jr., Charles E. Baukal
Download or read book The John Zink Combustion Handbook written by Jr., Charles E. Baukal and published by CRC Press. This book was released on 2001-03-27 with total page 801 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite the length of time it has been around, its importance, and vast amounts of research, combustion is still far from being completely understood. Industrial applications of combustion add environmental, cost, and fuel consumption issues to its fundamental complexity, and the process and power generation industries in particular present their o
Book Synopsis Biotreatment of Industrial Effluents by : Mukesh Doble
Download or read book Biotreatment of Industrial Effluents written by Mukesh Doble and published by Elsevier. This book was released on 2005-04-07 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: With increasing government regulation of pollution, as well as willingness to levy punitive fines for transgressions, treatment of industrial waste is a important subject. This book is a single source of information on treatment procedures using biochemical means for all types of solid, liquid and gaseous contaminants generated by various chemical and allied industries. This book is intended for practicing environmental engineers and technologists from any industry as well as researchers and professors. The topics covered include the treatment of gaseous, liquid and solid waste from a large number of chemical and allied industries that include dye stuff, chemical, alcohol, food processing, pesticide, pharmaceuticals, paint etc. Information on aerobic and anaerobic reactors and modeling and simulation of waste treatment systems are also discussed.* Compares chemical and biochemical means of industrial waste treatment* Provides details of technology (i.e. reactors, operating conditions etc) with regard to the biochemistry aspects.* Can be used as a teaching aid for graduate courses and a reference material by practicing environmental scientists and engineers.* Researchers can extract synergy between treatment procedures and various effluents.
Book Synopsis Propellants and Explosives by : Naminosuke Kubota
Download or read book Propellants and Explosives written by Naminosuke Kubota and published by John Wiley & Sons. This book was released on 2015-04-23 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: This third edition of the classic on the thermochemical aspects of the combustion of propellants and explosives is completely revised and updated and now includes a section on green propellants and offers an up-to-date view of the thermochemical aspects of combustion and corresponding applications. Clearly structured, the first half of the book presents an introduction to pyrodynamics, describing fundamental aspects of the combustion of energetic materials, while the second part highlights applications of energetic materials, such as propellants, explosives and pyrolants, with a focus on the phenomena occurring in rocket motors. Finally, an appendix gives a brief overview of the fundamentals of aerodynamics and heat transfer, which is a prerequisite for the study of pyrodynamics. A detailed reference for readers interested in rocketry or explosives technology.
Book Synopsis The Role of the Stratosphere in Global Change by : Marie-Lise Chanin
Download or read book The Role of the Stratosphere in Global Change written by Marie-Lise Chanin and published by Springer. This book was released on 2011-12-16 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists concerned with the processes occurring in the stratosphere are becoming more and more aware of the role that the stratosphere may play in the global climate and in global change in general. This book focuses on the basic processes taking place in the stratosphere and on the stratospheric changes which may occur from either natural or anthropogenic forcing. Of major concern here is the consequence of the increasing Antarctic Ozone Hole and the possibility of similar processes occurring at northern latitudes. One of the expected consequences of the change in the stratospheric composition, mainly ozone depletion, is the change in the penetration of UV-B in the troposphere, at the surface, and in the top layers of the ocean. Monitoring and modeling of those changes are still in infancy, even though the implications may be of utmost importance for the entire biosphere. Several aspects of these consequences with regard to aquatic ecosystems, terrestrial vegetation and human health are presented by experts in these fields.
Book Synopsis Environmental Pollution Control Engineering by : C. S. Rao
Download or read book Environmental Pollution Control Engineering written by C. S. Rao and published by New Age International. This book was released on 2007 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Revised Edition Of The Book On Environmental Pollution Control Engineering Features A Systematic And Thorough Treatment Of The Principles Of The Origin Of Air, Water And Land Pollutants, Their Effect On The Environment And The Methods Available To Control Them. The Demographic And Environmental Trends, Energy Consumption Patterns And Their Impact On The Environment Are Clearly Discussed. Application Of The Physical, And Chemical Engineering Concepts To The Design Of Pollution Control Equipment Is Emphasized. Due Importance Is Given To Modelling, Quality Monitoring And Control Of Specific Major Pollutants. A Separate Chapter On The Management Of Hazardous Wastes Is Added. Information Pertaining To Indian Conditions Is Given Wherever Possible To Help The Reader Gain An Insight Into India Sown Pollution Problems.This Book Is Mainly Intended As A Textbook For An Integrated One-Semester Course For Senior Level Undergraduate Or First Year Post-Graduate Engineering Students And Can Also Serve As A Reference Book To Practising Engineers And Decision Makers Concerned With Environmental Pollution Control.
Book Synopsis Atmospheric Chemistry by : Barbara J. Finlayson-Pitts
Download or read book Atmospheric Chemistry written by Barbara J. Finlayson-Pitts and published by Wiley-Interscience. This book was released on 1986 with total page 1164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides comprehensive coverage of the new and emerging discipline of atmospheric chemistry. Starting with the fundamentals of kinetics and photochemistry, it shows how the experimental techniques in these areas are applied to the study and control of chemical reactions in the troposphere. Gives detailed analysis of such major societal issues as smog, acid rain and volatile toxic organics, and treats the seven criteria pollutants considered by the U.S. Environmental Protection Agency to be hazardous, as well as a variety of trace non-criteria pollutants, such as those cited in the Clean Air Act of 1977. Also included is a comprehensive bibliography and over 340 illustrations.
Book Synopsis Process Engineering and Design for Air Pollution Control by : Jaime Benítez
Download or read book Process Engineering and Design for Air Pollution Control written by Jaime Benítez and published by . This book was released on 1993 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers cost estimation, incineration, adsorption devices, flue gas desulfurization, control of nitrogen oxides, particulate emissions control, cyclonic devices, electrostatic precipitators, and fabric filters.
Book Synopsis Emulsion Explosives by : Xuguang Wang
Download or read book Emulsion Explosives written by Xuguang Wang and published by . This book was released on 1994 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
