Download or read book Contribution l tude des m canismes de coagulation floculation written by Michel Franceschi and published by . This book was released on 1991 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: LA PREMIERE PARTIE DE CE MEMOIRE EST CONSACRE A L'ETUDE DE L'INFLUENCE DE LA COMPOSITION DE L'EAU ET DES CONDITIONS OPERATOIRES SUR L'EFFICACITE DE COAGULATION-FLOCULATION. L'ETUDE EST BASEE SUR L'UTILISATION DES MATRICES FACTORIELLES FRACTIONNAIRES ET DES RESEAUX UNIFORMES DE DOELHERT. A PARTIR DES RESULTATS OBTENUS, UN MODELE DE PREVISION DU TAUX DE COAGULANT A ETE ETABLI. LES TESTS EFFECTUES SUR UN SITE INDUSTRIEL ONT PERMIS DE CONSTATER LA BONNE ADEQUATION DU MODELE. LA DEUXIEME PARTIE EST CONSACREE A L'ETUDE DE LA MORPHOLOGIE DES AGREGATS FORMES LORS DU PROCESSUS DE COAGULATION-FLOCULATION. DEUX METHODES ONT ETE UTILISEES: UNE TECHNIQUE D'ANALYSE D'IMAGE, LA DETERMINATION D'UNE DIMENSION FRACTALE CARACTERISANT LA STRUCTURE DES AGREGATS. LES RESULTATS OBTENUS MONTRENT QUE LA TAILLE ET LA FORME DES AGREGATS EVOLUENT AVEC L'EFFICACITE DE COAGULATION ET EN FONCTION DE LA NATURE DU COAGULANT. IL Y A EGALEMENT UNE VARIATION DE LA DIMENSION FRACTALE, CE QUI REFLETE UNE MODIFICATION DE LA STRUCTURE DES AGREGATS QUAND L'EFFICACITE DE COAGULATION AUGMENTE

Download or read book M canisme de coagulation et de floculation de suspensions d argiles dilu es rencontr es en traitement des eaux written by Moïse Désiré Dihang and published by . This book was released on 2007 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mécanismes de coagulation et de floculation de suspensions d'argiles diluées rencontrées en traitement des eaux La latérite est la principale matière en suspension dans les eaux de rivière (eaux brutes) des régions tropicales. Son élimination est le principal enjeu du processus de potabilisation de ces eaux. La latéritique est une argile qui confère à l'eau un aspect trouble de couleur rougeâtre, y compris à de très faibles concentrations. Au-delà de 160 NTU de turbidité initiale (TI), les particules de latérite en suspension subissent une auto-floculation qui modifie les paramètres de coagulation et de floculation respectivement par des sels métalliques hydrolysables et des polymères. Ainsi, en-deçà de 160 NTU, la concentration critique de coagulation (CCC) de la latérite par le chlorure d'aluminium augmente avec la TI, tandis qu'au-delà de 160 NTU, la CCC diminue quand la TI augmente. La concentration maximale de coagulant ajoutée à la CCC et quelle que soit la TI est de l'ordre du quart des valeurs prescrites par les normes pour l'eau potable. Le potentiel Zeta semble être un paramètre plus pertinent que la turbidité résiduelle (TR) pour étudier la coagulation de telles suspensions. Dans tous les cas et quelle que soit la TI, le potentiel Zéta à la CCC est proche -20 MV. La floculation, par des polyacrylamides non ioniques (PAM-N), cationiques (PAM-C), ou anioniques (PAM-A) de poids moléculaire élevé favorise la réduction de la turbidité des suspensions coagulées. Cette réduction est indépendante de la quantité de polymère ajouté lorsque la suspension est coagulée à la CCC. Dans les autres cas, la réduction de la turbidité dépend de la concentration de polymère ajouté. Au contraire de suspensions de TI faible, la floculation n'améliore pas sensiblement l'efficacité de la coagulation pour les suspensions de TI élevée. A de faibles concentrations, PAM-N et PAM-A ne modifient pas sensiblement le potentiel Zeta des particules de latérite, ce qui permet d'utiliser le potentiel zéta comme un paramètre adéquat pour le suivie de la déstabilisation de suspensions de latérite par coagulation et floculation. Les particules de latérite sont par contre très sensibles à la présence de PAM-C, qui induit des inversions de charge de surface même à très faibles concentrations...

Download or read book Etude de la coagulation et de la floculation d une suspension mixte des eaux usees d une raffinerie de petrole written by Acher Elcabetz and published by . This book was released on 1975 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coagulation and Flocculation written by and published by . This book was released on 1955 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coagulation Kinetics and Structure Formation written by Hans Sonntag and published by . This book was released on 1987 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Everything You Want to Know about Coagulation Flocculation written by Zeta-Meter, Inc and published by . This book was released on 1988 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coagulation Current Research and Clinical Applications Proceedings Edited by Gottfried Schmer and Paul E Strandjord written by Symposium on Current Topics in Coagulation, University of Washington, 1972 and published by . This book was released on 1973 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Current concepts of coagulation and hemostasis proceedings eds R Losito written by Quebec Coagulation Conference, Univ. de Sherbrooke, Quebec, 1970 and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Etude de la coagulation et de la floculation d une suspension mixte des eaux us es d une raffinerie de p trole written by Elcabetz, Acher and published by 1975 [c1976]. This book was released on 1975 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Coagulation and Flocculation in Water and Wastewater Treatment written by John Bratby and published by IWA Publishing. This book was released on 2006-10-15 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coagulation and Flocculation in Water and Wastewater Treatment provides a comprehensive account of coagulation and flocculation techniques and technologies in a single volume covering theoretical principles to practical applications. Thoroughly revised and updated since the 1st Edition it has been progressively modified and increased in scope to cater for the requirements of practitioners involved with water and wastewater treatment. A thorough gamut of treatment scenarios is attempted, including turbidity, color and organics removal, including the technical aspects of enhanced coagulation. The effects of temperature and ionic content are described as well as the removal of specific substances such as arsenic and phosphorus. Chemical phosphorus removal is dealt with in detail, Rapid mixing for efficient coagulant utilization, and flocculation are dealt with in specific chapters. Water treatment plant waste sludge disposal is dealt with in considerable detail, in an Appendix devoted to this subject. Invaluble for water scientists, engineers and students of this field, Coagulation and Flocculation in Water and Wastewater Treatment is a convenient reference handbook in the form of numerous examples and appended information.

Download or read book Natural Organic Matter in Water written by Mika Silanpää and published by Butterworth-Heinemann. This book was released on 2014-10-07 with total page 383 pages. Available in PDF, EPUB and Kindle. Book excerpt: Approximately 77 percent of the freshwater used in the United States comes from surface-water sources and is subject to natural organic matter contamination according to the United States Geological Survey. This presents a distinct challenge to water treatment engineers. An essential resource to the latest breakthroughs in the characterization, treatment and removal of natural organic matter (NOM) from drinking water, Natural Organic Matter in Waters: Characterization and Treatment Methods focuses on advance filtration and treatment options, and processes for reducing disinfection byproducts. Based on the author’s years of research and field experience, this book begins with the characterization of NOM including: general parameters, isolation and concentration, fractionation, composition and structural analysis and biological testing. This is followed by removal methods such as inorganic coagulants, polyelectrolytes and composite coagulants. Electrochemical and membranes removal methods such as: electrocoagulation, electrochemical oxidation, microfiltration and ultrafiltration, nanofiltration and membrane fouling. Covers conventional as well as advanced NOM removal methods Includes characterization methods of NOM Explains removal methods such as: removal by coagulation, electrochemical, advanced oxidation, and integrated methods

Download or read book Advances in Membrane Technologies for Water Treatment written by Angelo Basile and published by Elsevier. This book was released on 2015-02-28 with total page 667 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in Membrane Technologies for Water Treatment: Materials, Processes and Applications provides a detailed overview of advanced water treatment methods involving membranes, which are increasingly seen as effective replacements for a range of conventional water treatment methods. The text begins with reviews of novel membrane materials and advances in membrane operations, then examines the processes involved with improving membrane performance. Final chapters cover the application of membrane technologies for use in water treatment, with detailed discussions on municipal wastewater and reuse in the textile and paper industries. Provides a detailed overview of advanced water treatment methods involving membranes Coverage includes advancements in membrane materials, improvement in membrane performance, and their applications in water treatment Discusses the use of membrane technologies in the production of drinking water, desalination, wastewater treatment, and recovery

Download or read book Coagulation and Flocculation written by John Bratby and published by . This book was released on 1980 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal de physique th orique et appliqu e written by and published by . This book was released on 1924 with total page 1284 pages. Available in PDF, EPUB and Kindle. Book excerpt: Beginning in 1920, contains section on bibliography and since 1928 minutes and résumeés of the society's proceedings, as well as other supplementary material (often separately paged).

Download or read book TECHNEAU written by Christian Kazner and published by IWA Publishing. This book was released on 2009-06-14 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: The best papers from the three-day conference on Safe Drinking Water from Source to Tap June 2009 in Maastricht are published in this book covering the themes of challenges of the water sector and adaptive strategies, treatment, distribution, risk assessment and risk management, sensors and monitoring, small scale systems, simulation, alternative water supply & sources, consumer involvement, and future drinking water. Worldwide, the water supply sector is facing tremendous challenges. Every new emerging contaminants and pathogens and aging infrastructures that are vulnerable for deliberate contamination pose a threat to the quality of water supplies. Shortage of good quality and readily treatable resources is increasing due to global warming, urbanisation and pollution from agriculture and industry. Regulators and consumers are becoming more demanding. Techneau - the largest European project on drinking water - addresses these challenges by developing adaptive supply system options and new and improved treatment and monitoring technologies. Future system options to be studied are flexible, small scale and multi-source supplies, utilising non conventional resources like brackish ground water, treated wastewater and urban groundwater.

Download or read book Carbon Black written by Jean-Baptiste Donnet and published by Routledge. This book was released on 2018-05-04 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: The second edition of this reference provides comprehensive examinations of developments in the processing and applications of carbon black, including the use of new analytical tools such as scanning tunnelling microscopy, Fourier transform infrared spectroscopy and inverse gas chromatography.;Completely rewritten and updated by numerous experts in the field to reflect the enormous growth of the field since the publication of the previous edition, Carbon Black: discusses the mechanism of carbon black formation based on recent advances such as the discovery of fullerenes; elucidates micro- and macrostructure morphology and other physical characteristics; outlines the fractal geometry of carbon black as a new approach to characterization; reviews the effect of carbon black on the electrical and thermal conductivity of filled polymers; delineates the applications of carbon black in elastomers, plastics, and zerographic toners; and surveys possible health consequences of exposure to carbon black.;With over 1200 literature citations, tables, and figures, this resource is intended for physical, polymer, surface and colloid chemists; chemical and plastics engineers; spectroscopists; materials scientists; occupational safety and health physicians; and upper-level undergraduate and graduate students in these disciplines.

Download or read book Current List of Medical Literature written by and published by . This book was released on 1945 with total page 808 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes section, "Recent book acquisitions" (varies: Recent United States publications) formerly published separately by the U.S. Army Medical Library.