Download or read book R duction de la production de boues written by María del Carmen Alonso San José and published by . This book was released on 2004 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Etude exp rimentale et mod lisation du proc d d oxydation par voie humide written by Merzak Belkhodja and published by . This book was released on 2000 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: Des campagnes expérimentales d'oxydation humide de différents types de boues d'épuration en conditions sous-critiques ont été menées dans un réacteur agite haute pression de 2,5L de volume fonctionnant en semi-continu. Les boues étudiées concernent les boues primaires, activées, digérées et mixtes. L'influence de la température et de la pression partielle en oxygène ont été étudiées dans des conditions modérées comprises respectivement entre 180 et 240C° et entre 5 et 20 bars. Différents paramètres expérimentaux ont été examinés : type de boues d'épuration, vitesse d'agitation, temps d'oxydation, température d'oxydation, pression partielle en oxygène, pH, et la concentration en ions carbonates. L'analyse des principales caractéristiques distribuées en phase liquide et solide a montré notamment que le procédé d'oxydation par voie humide peut être décrit en deux étapes successives de solubilisation et d'oxydation de la matière organique en phase soluble. Plusieurs approches de modélisation cinétiques ont été menées. Le modèle à l'équilibre, particulièrement adapté, a été utilisé pour la description des cinétiques de dégradation de la demande chimique en oxygène et de la production de l'acide acétique et de l'azote ammoniacal. Concernant la demande chimique en oxygène, son utilisation a conduit à la détermination des énergies d'activation, excepté pour les boues primaires, comprises entre 30 et 80 kj/mol aux ordres partiels en oxygène proches de 0,5. Une analogie à la catalyse hétérogène a été menée pour expliquer les faibles valeurs des paramètres cinétiques des boues primaires. Une étude de simulation de ce procédé a été entreprise dans des conditions industrielles. Un réacteur diphasique tubulaire continu à écoulement piston avec une boucle de recyclage externe a été considéré avec un modèle de connaissance base sur des bilans matières et thermiques. Une attention particulière a été accordée à l'élévation adiabatique de température et au taux de recyclage.
Download or read book R duction de la production de boue lors du traitement des eaux r siduaires urbaines written by and published by . This book was released on 2001 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: L'élimination des boues produites lors de l'épuration biologique des eaux usées fait partie des enjeux majeurs de la prochaine décennie. Les contraintes qui pèsent sur les filières classiques orientent les recherches vers des procédés de réduction de la production de boue au sein de la filière de traitement de l'eau. Ainsi, l'association entre une étape d'oxydation chimique par l'ozone et un traitement biologique par boues activées peut conduire à une réduction significative de la quantité de boue produite. Basée sur une double approche, expérimentale et de modélisation, l'analyse des mécanismes de la production de boue montre l'influence capitale des processus d'accumulation des matières organiques inertes particulaires provenant de l'effluent à traiter et issues du processus de décès. Si l'étape d'ozonation permet de rendre biodégradables ces fractions inertes, les simulations montrent qu'il est possible d'atteintre une réduction totale de la production de boue. Les essais discontinus d'ozonation de boue mettent en évidence une acion solubilisante de l'ozone sur la matière particulaire, une augmentation de la biodégradabilité et une inactivation significative des microorganismes. Les résultats obtenus permettent de construire un modèle d'action de l'ozone sur la boue qui, couplé au modèle du procédé biologique, permet de confirmer par la simulation l'intérêt du procédé combiné. Le couplage entre l'étape d'ozonation et le procédé biologique permet de supprimer la production de boue organique excédentaire et conduit à une réduction de la production de boue minérale. L'optimisation du mode d'apport de l'ozone apparaît déterminante pour garantir l'efficacité de l'étape d'ozonation. Ce travail met en évidence l'apparition d'un talon de DCO réfractaire dans l'effluent, l'amélioration des caractéristiques de décantation et le maintien des activités nitrifiantes. Il montre l'applicabilité de ce procédé et précises les conditions dans lesquelles il peut être mis en œuvre
Download or read book Advanced Oxidation Processes for Water and Wastewater Treatment written by Simon Parsons and published by IWA Publishing. This book was released on 2004-03-01 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: The suitability of Advanced Oxidation Processes (AOPs) for pollutant degradation was recognised in the early 1970s and much research and development work has been undertaken to commercialise some of these processes. AOPs have shown great potential in treating pollutants at both low and high concentrations and have found applications as diverse as ground water treatment, municipal wastewater sludge destruction and VOCs control. Advanced Oxidation Processes for Water and Wastewater Treatment is an overview of the advanced oxidation processes currently used or proposed for the remediation of water, wastewater, odours and sludge. The book contains two opening chapters which present introductions to advanced oxidation processes and a background to UV photolysis, seven chapters focusing on individual advanced oxidation processes and, finally, three chapters concentrating on selected applications of advanced oxidation processes. Advanced Oxidation Processes for Water and Wastewater Treatment will be invaluable to readers interested in water and wastewater treatment processes, including professionals and suppliers, as well as students and academics studying in this area. Dr Simon Parsons is a Senior Lecturer in Water Sciences at Cranfield University with ten years' experience of industrial and academic research and development.
Download or read book Faecal Sludge Management written by Linda Strande and published by IWA Publishing. This book was released on 2014-08-15 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.
Download or read book Nuclear Waste Conditioning written by France. Commissariat à l'énergie atomique (CEA) and published by Le Moniteur Editions. This book was released on 2009 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pharmaceuticals and Personal Care Products Waste Management and Treatment Technology written by Majeti Narasimha Vara Prasad and published by Butterworth-Heinemann. This book was released on 2019-04-04 with total page 507 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pharmaceuticals and Personal Care Products Waste Management and Treatment Technology: Emerging Contaminants and Micro Pollutants provides the tools and techniques for identifying these contaminates and applying the most effective technology for their remediation, recovery and treatment. The consumption of pharmaceuticals and personal care products (PPCPs) has grown significantly over the last 35 years, thus increasing their potential risk to the environment. As PPCPs are very difficult to detect and remove using conventional wastewater treatment methods, this book provides solutions to a growing problem. - Includes sampling, analytical and characterization methods and technology for detecting PPCPs in the environment - Provides advanced treatment and disposal technologies for the removal of PPCPs from wastewater, surface water, landfills and septic systems - Examines the pathways of PPCPs into the environment
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.
Download or read book The Self Potential Method written by André Revil and published by Cambridge University Press. This book was released on 2013-07-11 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt: The self-potential method enables non-intrusive assessment and imaging of disturbances in electrical currents of conductive subsurface materials. It has an increasing number of applications, from mapping fluid flow in the subsurface of the Earth to detecting preferential flow paths in earth dams and embankments. This book provides the first full overview of the fundamental concepts of this method and its applications in the field. It discusses the historical perspective, laboratory investigations undertaken, the inverse problem and seismoelectric coupling, and concludes with the application of the self-potential method to geohazards, water resources and hydrothermal systems. Chapter exercises, online datasets and analytical software enable the reader to put the theory into practice. This book is a key reference for academic researchers and professionals working in the areas of geophysics, environmental science, hydrology and geotechnical engineering. It will also be valuable reading for related graduate courses.
Download or read book How to Design Wastewater Systems for Local Conditions in Developing Countries written by David M. Robbins and published by IWA Publishing. This book was released on 2014-03-15 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is a practical handbook providing a step-by-step approach to the techniques used for characterizing wastewater sources and investigating sites where collection, treatment and reuse/disposal technologies will be installed. It is intended to help enable local implementation of on-site and decentralized wastewater management system (DWMS)for wide scale use in development settings. How to Design Wastewater Systems for Local Conditions in Developing Countries helps local service providers and regulatory officials make informed decisions through the use of tools, checklists and case studies. It includes a link to a web based community of on-site and decentralized wastewater professionals, which contains related tools and case studies. This handbook serves as a reference for training classes, certification programs, and higher education programs in civil and sanitary engineering. There is an increasing interest on the part of local government officials and private sector service providers to implement wastewater treatment systems to solve sanitation problems. The model presented in this handbook promotes activities that first generate data related to source and site conditions that represent critical inputs, and then applies this information to the technology selection process. Matching the most appropriate technologies to the specific needs of the wastewater project is the key that leads to long term sustainability. How to Design Wastewater Systems for Local Conditions in Developing Countries is an invaluable resource for public sector decision makers and private sector service providers in developing countries. It is also a useful text for students at engineering colleges in developing countries interested in taking a class that teaches the methods of decentralized wastewater management system (DWMS) development.
Download or read book A German English Dictionary for Chemists written by Austin M 1876-1956 Patterson and published by Scholar Select. This book was released on 2015-08-08 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book Compendium of Sanitation Systems and Technologies written by Elizabeth Tilley and published by . This book was released on 2014 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Boundaries of the West African Craton written by Nasser Ennih and published by Geological Society of London. This book was released on 2008 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biodiesel Production written by Biodiesel Production Technologies Challenges and Future Prospects Task Committee and published by . This book was released on 2019 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biodiesel Production: Technologies, Challenges, and Future Prospects provides in-depth information on fundamentals, approaches, technologies, source materials and associated socio-economic and political impacts of biodiesel production.
Download or read book Silica written by Peter J. Heaney and published by Walter de Gruyter GmbH & Co KG. This book was released on 2018-12-17 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 29 of Reviews in Mineralogy provides an updated silica review which focuses on the most recent developments. This book describes the crystal structures and phase transitions of silica and its stuffed derivatives; bridges the relationship between the microstructural character of real silica minerals and the behavior of silica in the geological environment; covers Quantum mechanical considerations of the Si-O bond; shows how calculations based upon first-principles theory can explain and predict silica transitions at high temperatures and pressures; covers spectroscopic analyses of silica and how they reveal vibrational behaviors in response to variations in temperature, pressure, and composition and finally details the uses of silica for industrial purposes.
Download or read book Agrochimica written by International Atomic Energy Agency and published by . This book was released on 1977 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic matter and soil productivity; Turnover of plant residues; Mineralization of organic compounds; Dynamics of organic forms of nitrogen; Nitrogen economy; Biodegradation of organic matter; Biochemical transformation of organic matter; Bitumens in soil organic matter; Characterization of humic acids; Carbon dating; Modern techniques and their implact on soil organic matter research; Sludge; Soil organic matter components and plant metabolism; Interaction between agrochemicals and organic matter; Peat.
Download or read book Heterogeneous Catalysis for the Synthetic Chemist written by Robert L. Augustine and published by CRC Press. This book was released on 2020-08-11 with total page 668 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work delineates the effect of different reaction variables on the outcome of heterogeneously catalyzed reactions, and explains how to optimize the product yield of specific compounds. Metal catalysis, simple and complex oxides, zeolites and clays are discussed, both as catalysts and as potential supports for catalytically active metals.
