980 resultados para Potable water supplies
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The idea of Territorial Intelligence emphasizes the participation of different types from actors in the decisions that concern to the local territory. Between the communitarian actors, the ocal organizations are fundamental because they have an existential knowledge of the geographic space who share the neighbors. That knowledge, is focused generally in the deficiencies of the district or of the district and it is constituted in its reason of being, like average for the defense as opposed to the authority of the local government. This so shared in common function is left lamentably to a quite traditional relation like intermediary between municipality and community annotated. A special case constitutes the cooperative calls of rural services or vicinal organizations that are in charge to administer the service of potable water, those that are generally led by people greater or small proprietors of traditional agriculture. A strong territorial identity can be observed that, as opposed to the transformations and modernization of the field, subsists exactly by that feeling of root. In the province of Mendoza, the importance of the ocal organizations was increased during the decade of the' 90 with the decentralization processes, to canalize house policies, some public works and services in the districts. From a perspective of associated management, projects of economic, cultural, environmental development would have to revitalize their function like organizations able to also agglutinate not only demands but that they promote to the local territory from other dimensions. With these motivations and the purpose of proposing strategies to induce practices of ocal work with territorial intelligence, a set of reflections that allow to compare the space distribution and the characteristics of these organizations between 90 years' and the present time, in some departments of the province of Mendoza appears. The most important result is expressed in a tipología of ocal unions, with a cartography that ties feasible territory and social actors to collaborate to generate transformations social, specially in rural areas
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The idea of Territorial Intelligence emphasizes the participation of different types from actors in the decisions that concern to the local territory. Between the communitarian actors, the ocal organizations are fundamental because they have an existential knowledge of the geographic space who share the neighbors. That knowledge, is focused generally in the deficiencies of the district or of the district and it is constituted in its reason of being, like average for the defense as opposed to the authority of the local government. This so shared in common function is left lamentably to a quite traditional relation like intermediary between municipality and community annotated. A special case constitutes the cooperative calls of rural services or vicinal organizations that are in charge to administer the service of potable water, those that are generally led by people greater or small proprietors of traditional agriculture. A strong territorial identity can be observed that, as opposed to the transformations and modernization of the field, subsists exactly by that feeling of root. In the province of Mendoza, the importance of the ocal organizations was increased during the decade of the' 90 with the decentralization processes, to canalize house policies, some public works and services in the districts. From a perspective of associated management, projects of economic, cultural, environmental development would have to revitalize their function like organizations able to also agglutinate not only demands but that they promote to the local territory from other dimensions. With these motivations and the purpose of proposing strategies to induce practices of ocal work with territorial intelligence, a set of reflections that allow to compare the space distribution and the characteristics of these organizations between 90 years' and the present time, in some departments of the province of Mendoza appears. The most important result is expressed in a tipología of ocal unions, with a cartography that ties feasible territory and social actors to collaborate to generate transformations social, specially in rural areas
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The idea of Territorial Intelligence emphasizes the participation of different types from actors in the decisions that concern to the local territory. Between the communitarian actors, the ocal organizations are fundamental because they have an existential knowledge of the geographic space who share the neighbors. That knowledge, is focused generally in the deficiencies of the district or of the district and it is constituted in its reason of being, like average for the defense as opposed to the authority of the local government. This so shared in common function is left lamentably to a quite traditional relation like intermediary between municipality and community annotated. A special case constitutes the cooperative calls of rural services or vicinal organizations that are in charge to administer the service of potable water, those that are generally led by people greater or small proprietors of traditional agriculture. A strong territorial identity can be observed that, as opposed to the transformations and modernization of the field, subsists exactly by that feeling of root. In the province of Mendoza, the importance of the ocal organizations was increased during the decade of the' 90 with the decentralization processes, to canalize house policies, some public works and services in the districts. From a perspective of associated management, projects of economic, cultural, environmental development would have to revitalize their function like organizations able to also agglutinate not only demands but that they promote to the local territory from other dimensions. With these motivations and the purpose of proposing strategies to induce practices of ocal work with territorial intelligence, a set of reflections that allow to compare the space distribution and the characteristics of these organizations between 90 years' and the present time, in some departments of the province of Mendoza appears. The most important result is expressed in a tipología of ocal unions, with a cartography that ties feasible territory and social actors to collaborate to generate transformations social, specially in rural areas
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Como consecuencia del proceso de desalación, se produce el vertido al mar de un agua de rechazo hipersalino o salmuera. La salinidad de este vertido es variable, dependiendo del origen de la captación y del proceso de tratamiento. Muchos de los hábitats y biocenosis de los ecosistemas marinos se encuentran adaptados a ambientes de salinidad casi constante y son muy susceptibles a los incrementos de salinidad originados por estos vertidos. Junto con el vertido de salmuera otro de los principales inconvenientes que plantean las plantas desaladoras es el alto consumo energético, con todas las desventajas que esto supone: alto coste del agua desalada para los consumidores, contaminación del medio... El desarrollo de los métodos de vertido, herramientas de gestión de la salmuera, estudios del comportamiento de la pluma salina… ha buscado la mitigación de estos efectos sobre los ecosistemas marinos. El desarrollo en membranas de ósmosis inversa, diseño de bombas y sistemas de recuperación de energía ha permitido también la reducción del consumo energético en las plantas de desalación. Sin embargo, estos campos parecen haber encontrado un techo tecnológico difícil de rebasar en los últimos tiempos. La energía osmótica se plantea como uno de los caminos a investigar aplicado al campo de la reducción del consumo energético en desalación de agua de mar, a través del aprovechamiento energético de la salmuera. Con esta tesis se pretende cumplir principalmente con los siguientes objetivos: reducción del consumo energético en desalación, mitigar el impacto del vertido sobre el medio y ser una nueva herramienta en la gestión de la salmuera. En el presente documento se plantea el desarrollo de un nuevo proceso que utiliza el fenómeno de la ósmosis directa a través de membranas semipermeables, y busca la sinergia desalación depuración, integrando ambos, en un único proceso de tratamiento dentro del ciclo integral del agua. Para verificar los valores de producción, calidad y rendimiento del proceso, se proyecta y construye una planta piloto ubicada en la Planta Desaladora de Alicante II, escalada de tal manera que permite la realización de los ensayos con equipos comerciales de tamaño mínimo. El objetivo es que el resultado final sea extrapolable a tamaños superiores sin que el escalado afecte a la certeza y fiabilidad de las conclusiones obtenidas. La planta se proyecta de forma que el vertido de una desaladora de ósmosis inversa junto con el vertido de un terciario convencional, se pasan por una ósmosis directa y a continuación por una ósmosis inversa otra vez, ésta última con el objeto de abrir la posibilidad de incrementar la producción de agua potable. Ambas ósmosis están provistas de un sistema de pretratamiento físico-químico (para adecuar la calidad del agua de entrada a las condiciones requeridas por las membranas en ambos casos), y un sistema de limpieza química. En todos los ensayos se usa como fuente de disolución concentrada (agua salada), el rechazo de un bastidor de ósmosis inversa de una desaladora convencional de agua de mar. La fuente de agua dulce marca la distinción entre dos tipos de ensayos: ensayos con el efluente del tratamiento terciario de una depuradora convencional, con lo que se estudia el comportamiento de la membrana ante el ensuciamiento; y ensayos con agua permeada, que permiten estudiar el comportamiento ideal de la membrana. Los resultados de los ensayos con agua salobre ponen de manifiesto problemas de ensuciamiento de la membrana, el caudal de paso a través de la misma disminuye con el tiempo y este efecto se ve incrementado con el aumento de la temperatura del agua. Este fenómeno deriva en una modificación del pretratamiento de la ósmosis directa añadiendo un sistema de ultrafiltración que ha permitido que la membrana presente un comportamiento estable en el tiempo. Los ensayos con agua permeada han hecho posible estudiar el comportamiento “ideal” de la membrana y se han obtenido las condiciones óptimas de operación y a las que se debe tender, consiguiendo tasas de recuperación de energía de 1,6; lo que supone pasar de un consumo de 2,44 kWh/m3 de un tren convencional de ósmosis a 2,28 kWh/m3 al añadir un sistema de ósmosis directa. El objetivo de futuras investigaciones es llegar a tasas de recuperación de 1,9, lo que supondría alcanzar consumos inferiores a 2 kWh/m3. Con esta tesis se concluye que el proceso propuesto permite dar un paso más en la reducción del consumo energético en desalación, además de mitigar los efectos del vertido de salmuera en el medio marino puesto que se reduce tanto el caudal como la salinidad del vertido, siendo además aplicable a plantas ya existentes y planteando importantes ventajas económicas a plantas nuevas, concebidas con este diseño. As a consequence of the desalination process, a discharge of a hypersaline water or brine in the sea is produced. The salinity of these discharges varies, depending on the type of intake and the treatment process. Many of the habitats and biocenosis of marine ecosystems are adapted to an almost constant salinity environment and they are very susceptible to salinity increases caused by these discharges. Besides the brine discharge, another problem posed by desalination plants, is the high energy consumption, with all the disadvantages that this involves: high cost of desalinated water for consumers, environmental pollution ... The development of methods of disposal, brine management tools, studies of saline plume ... has sought the mitigation of these effects on marine ecosystems. The development of reverse osmosis membranes, pump design and energy recovery systems have also enabled the reduction of energy consumption in desalination plants. However, these fields seem to have reached a technological ceiling which is difficult to exceed in recent times. Osmotic power is proposed as a new way to achieve the reduction of energy consumption in seawater desalination, through the energy recovery from the brine. This thesis mainly tries to achieve the following objectives: reduction of energy consumption in desalination, mitigation of the brine discharge impact on the environment and become a new tool in the management of the brine. This paper proposes the development of a new process, that uses the phenomenon of forward osmosis through semipermeable membranes and seeks the synergy desalination-wastewater reuse, combining both into a single treatment process within the integral water cycle. To verify the production, quality and performance of the process we have created a pilot plant. This pilot plant, located in Alicante II desalination plant, has been designed and built in a scale that allows to carry out the tests with minimum size commercial equipment. The aim is that the results can be extrapolated to larger sizes, preventing that the scale affects the accuracy and reliability of the results. In the projected plant, the discharge of a reverse osmosis desalination plant and the effluent of a convencional tertiary treatment of a wastewater plant, go through a forward osmosis module, and then through a reverse osmosis, in order to open the possibility of increasing potable water production. Both osmosis systems are provided with a physicochemical pretreatment (in order to obtain the required conditions for the membranes in both cases), and a chemical cleaning system. In all tests, it is used as a source of concentrated solution (salt water), the rejection of a rack of a conventional reverse osmosis seawater desalination. The source of fresh water makes the difference between two types of tests: test with the effluent from a tertiary treatment of a conventional wastewater treatment plant (these tests study the behavior of the membrane facing the fouling) and tests with permeate, which allow us to study the ideal behavior of the membrane. The results of the tests with brackish water show fouling problems, the flow rate through the membrane decreases with the time and this effect is increased with water temperature. This phenomenon causes the need for a modification of the pretreatment of the direct osmosis module. An ultrafiltration system is added to enable the membrane to present a stable behavior . The tests with permeate have made possible the study of the ideal behavior of the membrane and we have obtained the optimum operating conditions. We have achieved energy recovery rates of 1.6, which allows to move from a consumption of 2.44 kWh/m3 in a conventional train of reverse osmosis to 2.28 kWh / m3 if it is added the direct osmosis system. The goal of future researches is to achieve recovery rates of 1.9, which would allow to reach a consumption lower than 2 kWh/m3. This thesis concludes that the proposed process allows us to take a further step in the reduction of the energy consumption in desalination. We must also add the mitigation of the brine discharge effects on the marine environment, due to the reduction of the flow and salinity of the discharge. This is also applicable to existing plants, and it suggests important economic benefits to new plants that will be built with this design.
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Supporting data are included in PDF and CSV files; any additional data may be obtained from the corresponding author (e-mail: j.vinogradov@imperial.ac.uk). TOTAL is thanked for partial support of Jackson's Chair in Geological Fluid Mechanics and for supporting the activities of the TOTAL Laboratory for Reservoir Physics at Imperial College London where these experiments were conducted. The Editor thanks Andre Revil and Paul Glover for their assistance in evaluating this paper.
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Crohn disease (CD) is a chronic, panenteric intestinal inflammatory disease. Its etiology is unknown. Analogous to the tuberculoid and lepromatous forms of leprosy, CD may have two clinical manifestations. One is aggressive and fistulizing (perforating), and the other is contained, indolent, and obstructive (nonperforating) [Gi]-berts, E. C. A. M., Greenstein, A. J., Katsel, P., Harpaz, N. & Greenstein, R. J. (1994) Proc. Natl. Acad. Sci. USA 91, 12721-127241. The etiology, if infections, may be due to Mycobacterium paratuberculosis. We employed reverse transcription PCR using M. paratuberculosis subspecies-specific primers (IS 900) on total RNA from 12 ileal mucosal specimens (CD, n = 8; controls, n = 4, 2 with ulcerative colitis and 2 with colonic cancer). As a negative control, we used Myobacterium avium DNA, originally cultured from the drinking water of a major city in the United States. cDNA sequence analysis shows that all eight cases of Crohn's disease and both samples from the patients with ulcerative colitis contained M. paratuberculosis RNA. Additionally, the M. avium control has the DNA sequence of M. paratuberculosis. We demonstrate the DNA sequence of M. paratuberculosis from mucosal specimens from humans with CD. The potable water supply may be a reservoir of infection. Although M. paratuberculosis signal in CD has been previously reported, a cause and effect relationship has not been established. In part, this is due to conflicting data from studies with empirical antimycobacterial therapy. We conclude that clinical trials with anti-M. paratuberculosis therapy are indicated in patients with CD who have been stratified into the aggressive (perforating) and contained (nonperforating) forms.
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Nessa pesquisa são relatados os resultados da determinação das concentrações de microcistina e de biomassa algal após as várias etapas de tratamento de amostras de água coletadas junto ao reservatório de Barra Bonita-SP visando obtenção de água potável. O tratamento foi realizado em escala de laboratório com e sem aplicação de carvão ativado em pó (CAP) e as etapas foram: coagulação com aplicação de cloreto férrico, sedimentação, filtração em papel de filtro. Foi possível observar que a pré-clarificação desse tipo de água por coagulação seguida de sedimentação requereu dosagens relativamente elevadas de cloreto férrico (80 mg/L), tendo sido verificada eficiência muito baixa de remoção de microcistina nas etapas de tratamento por sedimentação seguida de filtração, quando não foi aplicado CAP. Apenas com a aplicação de CAP a microcistina foi reduzida à níveis que atendessem os padrões de potabilidade previstos na Portaria 518/04 (concentração menor que 1 μg/L). A determinação de microcistina pelo método que utiliza Imunoadsorventes Ligados à Enzima (ELISA) mostrou-se uma ferramenta útil e confiável para detectar e quantificar essa toxina, embora ainda apresente custo relativamente elevado.
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This layer is a georeferenced raster image of the historic paper map entitled: Trigonometrical survey of the Maldive Islands, by Commander R. Moresby, assisted by Lieut. F.T. Powell, Indian Navy ; additions and corrections by Professor A. Agassiz, Mr. Stanley Gardiner and Mr. L. A. Molony, 1902 ; eng. by J. & C. Walker. Sheet 1. It was published by Hydrographic Office, 1904. Scale [ca. 1:310,000]. This layer is image 1 of 3 total images of the three sheet source map representing the northern portion of the map. The image inside the map neatline is georeferenced to the surface of the earth and fit to the 'Mercator' projection. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, human settlements, ground cover, shoreline features, inlets, lagoons, shoals, sand banks, atolls, islands and islets, points, rocks, bottom types, and more. Relief shown by spot heights. Depths shown by soundings. Includes notes on navigation and locations of potable water. This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection and the Harvard University Library as part of the Open Collections Program at Harvard University project: Organizing Our World: Sponsored Exploration and Scientific Discovery in the Modern Age. Maps selected for the project correspond to various expeditions and represent a range of regions, originators, ground condition dates, scales, and purposes.
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This layer is a georeferenced raster image of the historic paper map entitled: Trigonometrical survey of the Maldive Islands, by Commander R. Moresby, assisted by Lieut. F.T. Powell, Indian Navy ; additions and corrections by Professor A. Agassiz, Mr. Stanley Gardiner and Mr. L. A. Molony, 1902 ; eng. by J. & C. Walker. Sheet 2. It was published by Hydrographic Office, 1904. Scale [ca. 1:310,000]. This layer is image 2 of 3 total images of the three sheet source map representing the central portion of the map. The image inside the map neatline is georeferenced to the surface of the earth and fit to the 'Mercator' projection. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, human settlements, ground cover, shoreline features, inlets, lagoons, shoals, sand banks, atolls, islands and islets, points, rocks, bottom types, and more. Relief shown by spot heights. Depths shown by soundings. Includes notes on navigation and locations of potable water. This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection and the Harvard University Library as part of the Open Collections Program at Harvard University project: Organizing Our World: Sponsored Exploration and Scientific Discovery in the Modern Age. Maps selected for the project correspond to various expeditions and represent a range of regions, originators, ground condition dates, scales, and purposes.
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This layer is a georeferenced raster image of the historic paper map entitled: Trigonometrical survey of the Maldive Islands, by Commander R. Moresby, assisted by Lieut. F.T. Powell, Indian Navy ; additions and corrections by Professor A. Agassiz, Mr. Stanley Gardiner and Mr. L. A. Molony, 1902 ; eng. by J. & C. Walker. Sheet 3. It was published by Hydrographic Office, 1904. Scale [ca. 1:310,000]. This layer is image 3 of 3 total images of the three sheet source map representing the southern portion of the map. The image inside the map neatline is georeferenced to the surface of the earth and fit to the 'Mercator' projection. All map collar and inset information is also available as part of the raster image, including any inset maps, profiles, statistical tables, directories, text, illustrations, index maps, legends, or other information associated with the principal map. This map shows features such as drainage, human settlements, ground cover, shoreline features, inlets, lagoons, shoals, sand banks, atolls, islands and islets, points, rocks, bottom types, and more. Relief shown by spot heights. Depths shown by soundings. Includes notes on navigation and locations of potable water. This layer is part of a selection of digitally scanned and georeferenced historic maps from the Harvard Map Collection and the Harvard University Library as part of the Open Collections Program at Harvard University project: Organizing Our World: Sponsored Exploration and Scientific Discovery in the Modern Age. Maps selected for the project correspond to various expeditions and represent a range of regions, originators, ground condition dates, scales, and purposes.
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"January, 1988."
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Cover title.
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Originally published: Fall 1978.
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Mode of access: Internet.
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Cover title.