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Book Analyse et optimisation de plusieurs proc  d  s d   limination de la mati  re organique naturelle dissoute en vue du traitement d eau potable

Download or read book Analyse et optimisation de plusieurs proc d s d limination de la mati re organique naturelle dissoute en vue du traitement d eau potable written by Ronan Treguer and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: La matière organique naturelle (MON) est devenue aujourd’hui un critère primordial de la qualité des eaux potables. Le premier objectif de ces travaux a été d’évaluer les performances de matériaux particulaires vis-à-vis de l’élimination de la MON après clarification, puis l’action de polymères cationiques, associés ou non à un coagulant classique, a été investiguée ; l’association des deux types de réactifs a ensuite été réalisée. Le charbon actif (CA) ayant confirmé son potentiel d’élimination de la MON, et l’amélioration de la coagulation – floculation ayant montré des limites, les travaux se sont tournés vers l’utilisation de CA. Après comparaison des performances de plusieurs CA commerciaux vis-à-vis de la MON dissoute, les travaux ont porté sur le couplage d’une suspension de CA d’âge élevé avec une séparation par ultrafiltration. Différentes techniques analytiques ont été utilisées : analyses de COD, de CODB, d’UV, utilisation de chromatographie d’exclusion stérique.

Book   tude d un coagulant organique naturel pour le traitement des eaux potable et us  es

Download or read book tude d un coagulant organique naturel pour le traitement des eaux potable et us es written by Nora Aouba and published by . This book was released on 2017 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le Tanfloc est un coagulant organique naturel à base d'extrait de tanin. Ce produit est issu du métabolisme de certaines plantes, dont l'Acacia mearnsii, qui est utilisé pour sa production. Selon certaines études, le Tanfloc présenterait des performances d'abattement de la matière organique dissoute comparables à celles de l'alun dans le traitement des eaux de surface, avec l'avantage de ne pas être influencé par le pH. Il pourrait être également utilisé comme l'alun, dans le traitement des eaux usées, pour l'abattement de la DCO (Demande chimique en Oxygène), de la MES (Matière En Suspension) et de la demande biologique en oxygène. Contrairement aux autres coagulants organiques naturels, tels que le Moringa, le Tanfloc est présenté comme le coagulant organique qui pourrait être un alternatif aux coagulants inorganiques tels que l'alun, dont l'utilisation présente quelques inconvénients. Les objectifs de cette étude, sont d'améliorer les connaissances sur ce coagulant : ses mécanismes de coagulation, ses performances, et d'étudier les possibilités de son utilisation dans le traitement des eaux usées et dans la potabilisation en comparaison avec l'alun. En eau potable, les résultats de séries de jar tests réalisées avec des sources d'eau différentes (Fleuve Saint Laurent et la Rivière Chaudière), montrent que le résiduel de COD (Carbone organique dissous) du Tanfloc en plus de dégrader la qualité de l'eau traitée, implique une demande en chlore plus élevée. Cependant, il semble que cet apport de COD ne soit pas précurseur des sous-produits de désinfection. En outre, tout comme l'alun, ses performances sont influencées par la variation du pH, de la dose et des caractéristiques de l'eau brute. En eaux usées, bien qu'il ne permette pas l'abattement de l'azote total et du phosphore total, le Tanfloc pourrait être utilisé dans le traitement des eaux usées (traitement primaire), car il permet selon nos résultats un meilleur abattement de la DCO et de la MES que l'alun. En outre, le caractère organique des boues produites suite à l'utilisation du Tanfloc pourrait améliorer leurs valorisations.

Book La mati  re organique naturelle dissoute des eaux de surface

Download or read book La mati re organique naturelle dissoute des eaux de surface written by Bénédicte Martin and published by . This book was released on 1995 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE PRINCIPAL OBJECTIF DE CETTE ETUDE VISAIT A UNE MEILLEURE CONNAISSANCE DE LA MATIERE ORGANIQUE AQUATIQUE NATURELLE POUR UNE OPTIMISATION DES CONDITIONS DE TRAITEMENT EN USINE. CES TRAVAUX SE SONT APPUYES SUR LE DEVELOPPEMENT DES PROTOCOLES DE FRACTIONNEMENT ET D'EXTRACTION, BASES SUR LA FILTRATION SUR RESINES XAD-8 ET XAD-4, PROCEDURES PERMETTANT D'EXTRAIRE LES ACIDES HUMIQUES ET FULVIQUES (SUBSTANCES HUMIQUES) ET LES ACIDES HYDROPHILES, OU DE FRACTIONNER LA MATIERE ORGANIQUE DISSOUTE EN SUBSTANCES HYDROPHOBES, ACIDES HYDROPHILES ET HYDROPHILES NON RETENUES. LA METHODE D'EXTRACTION PERMET D'ISOLER TROIS FRACTIONS DE PROPRIETES STRUCTURALES DIFFERENTES. EN ACCORD AVEC SA DENOMINATION, LES ACIDES HYDROPHILES ONT PRESENTE UNE STRUCTURE PLUS HYDROPHILE QUE LES SUBSTANCES HUMIQUES. EN EFFET, CETTE FRACTION EST MOINS AROMATIQUE, DE PLUS FAIBLE MASSE MOLECULAIRE ET CONTIENT MOINS DE CARBONE (42%) ET PLUS D'OXYGENE (44%) QUE LES SUBSTANCES HUMIQUES. LEUR TENEUR EN AZOTE EST COMPARABLE A CELLE DES ACIDES HUMIQUES ET INFERIEURE A CELLE DES ACIDES FULVIQUES EN ACCORD AVEC LA PROPORTION EN ACIDES AMINES. L'ANALYSE RMN#1#3C ET LA PYROLYSE SOULIGNENT QUE LES ACIDES HYDROPHILES PROVIENNENT PRINCIPALEMENT DES SUCRES. LE PROTOCOLE DE FRACTIONNEMENT A MONTRE QUE LA FRACTION HYDROPHOBE ETAIT EQUIVALENTE A CELLE HYDROPHILE. LE TRAITEMENT DE COAGULATION DIMINUE TRES LEGEREMENT LA FRACTION HYDROPHOBE ET SIGNIFICATIVEMENT LE COD ET LE CODB (50%), L'ABSORBANCE UV (70%), LES MASSES MOLECULAIRES ET LA REACTIVITE AVEC LES OXYDANTS. CES RESULTATS SONT EN ACCORD AVEC CEUX OBTENUS SUR LES FRACTIONS, A SAVOIR QUE LA COAGULATION REDUIT DANS LES MEMES PROPORTIONS LES ACIDES HYDROPHILES ET FULVIQUES. LA MATIERE ORGANIQUE REFRACTAIRE A LA COAGULATION DES FRACTIONS OU DES EAUX PRESENTE DES PFTOX DE 11630 G CL/MG C POUR UNE ABSORBANCE UV RELATIVE DE 0,0180,004 CM#-#1 1 MG#-#1 C. LES EAUX CLARIFIE OU BRUTES, PRESENTENT DES CORRELATIONS ENTRE LA REACTIVITE AVEC LES OXYDANTS, L'ABSORBANCE UV ET LE COD. SEULE UNE CORRELATION ENTRE LE CODB ET LA FRACTION HYDROPHILE EST OBTENUE POUR DES DOSES DIFFERENTES. NOTONS QUE LA SAISON ET L'ORIGINE A UNE INFLUENCE NOTABLE SUR PRATIQUEMENT TOUS LES PARAMETRES MESURES

Book ICREEC 2019

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 Characterization  Treatment and Use of Sewage Sludge

Download or read book Characterization Treatment and Use of Sewage Sludge written by P. L'Hermite and published by Springer. This book was released on 1981-05-31 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of the Second European Symposium held in Vienna, Austria, 21-23 October, 1980

Book Integration of Geographic Information Systems and Remote Sensing

Download or read book Integration of Geographic Information Systems and Remote Sensing written by Jeffrey L. Star and published by Cambridge University Press. This book was released on 1997-01-28 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Applications of remote sensing and geographic information systems to resource management and environmental research.

Book Ground Improvement Techniques

Download or read book Ground Improvement Techniques written by T. G. Sitharam and published by Springer. This book was released on 2022-04-08 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents select papers presented at the 7th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. The papers discuss advances in the fields of soil dynamics and geotechnical earthquake engineering. Some of the themes include slope stability, shallow and deep foundations, geosynthetics, ground improvement techniques, etc. A strong emphasis is placed on connecting academic research and field practice, with many examples, case studies, best practices, and discussions on performance based design. This volume will be of interest to researchers and practicing engineers alike.

Book People and Environment in Africa

Download or read book People and Environment in Africa written by Tony Binns and published by . This book was released on 1995-04-12 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of case studies revealing how the indigenous people of Africa are coping with the local environment by using a number of methods such as soil conservation, diversification, pastoral systems, irrigation projects and innovative crop-growing strategies.

Book Climate Information and Prediction Services

Download or read book Climate Information and Prediction Services written by World Meteorological Organization and published by . This book was released on 1995 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Gaining public acceptance

Download or read book Gaining public acceptance written by Anju Singh and published by IUCN. This book was released on 2005 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Experimental Long lead Forecast Bulletin

Download or read book Experimental Long lead Forecast Bulletin written by and published by . This book was released on 1994 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Climate Prediction and Agriculture

Download or read book Climate Prediction and Agriculture written by Mannava VK Sivakumar and published by Springer Science & Business Media. This book was released on 2007-05-26 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on an International Workshop held in Geneva in 2005, this book reviews the advances made so far in seasonal climate predictions and their applications for management and decision-making in agriculture. It also identifies the challenges to be addressed in the next 5 to 10 years to further enhance operational applications of climate predictions in agriculture, especially in developing countries.

Book The Natural Radiation Environment VII

Download or read book The Natural Radiation Environment VII written by J.P. McLaughlin and published by Elsevier. This book was released on 2005-03-30 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Natural Radiation Environment Symposium (NRE VII), the Seventh in the NRE series, which commenced forty years ago in 1963 at Rice University Texas, was held in Rhodes (Greece) in May 2002. During the intervening four decades the research work presented at these NRE Symposia has contributed to a deeper understanding of natural radiation and in particular of its contribution to human radiation exposures.It is clear from the quality and diversity of the 143 papers in this volume of Radioactivity in the Environment series that the study of the natural radiation environment is an active and continually expanding field of research. The papers in this volume fall into a number of main and topical research areas namely: the measurement and behaviour of natural radionuclides in the environment cosmic radiation measurement and dosimetry the external penetrating radiation field at ground level TENR (Technologically Enhanced Natural Radiation) and NORM (Naturally Occurring Radioactive Materials) studies assessment of the health effects of radon regulatory aspects of natural radiation exposures In these papers the results of many new surveys of natural radionuclide levels in the environment and of improved methods of detection are described. While some of the natural radiation sources investigated are unmodified by human activity, many accounts are given here of exposures to natural sources which have been enhanced by technology. Such TENR and NORM exposures are shown to range from activities such as mining, oil and gas exploitation, the use of industrial by-products as building materials, to space travel to name but a few. In several cases quite high doses to some individuals are shown to occur. Accounts are given here of methods to prevent and reduce exposures to such sources.

Book Forest Fire Research

Download or read book Forest Fire Research written by Universidade de Coimbra and published by . This book was released on 2010 with total page 355 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Wastewater Technology Centre

    Book Details:
  • Author : Wastewater Technology Centre (Canada)
  • Publisher :
  • Release : 1991
  • ISBN :
  • Pages : 7 pages

Download or read book Wastewater Technology Centre written by Wastewater Technology Centre (Canada) and published by . This book was released on 1991 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: