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Search Results: 1 - 10 of 21734 matches for " Sandra Milena; Ordó?ez Ante "
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Evaluación de la eficiencia de una batería de filtros empacados en zeolita en la remoción de metales pesados presentes en un licor mixto bajo condiciones de laboratorio
Acevedo Cifuentes,Diana Rocío; Builes Felizzola,Sandra Milena; Ordó?ez Ante,Carlos Andrés; López Sánchez,Idalia Jacqueline;
Revista Ingenierías Universidad de Medellín , 2011,
Abstract: this article shows the research results on the removal of five heavy metals (lead, nickel, chromium, cadmium and mercury) present in a liquor made of a mixture of wastewater from san fernando wastewater treatment plant and a solution prepared with known concentrations of heavy metals, using a series of batery filters packed with zeolita clinoptilolita. the experiments were run under controlled conditions of flow and ph, at room temperature. it was found that the removal efficiency was significantly high under the specified design conditions; also, it was found an important removal of the contaminants after passing through the filters, independently of the initial concentration, with the highest observed removal for mercury.
Evaluación de la eficiencia de una batería de filtros empacados en zeolita en la remoción de metales pesados presentes en un licor mixto bajo condiciones de laboratorio Evaluation of efficiency of a filter battery packaging zeolite in the removal of heavy metals in a mixed liquor under laboratory conditions
Diana Rocío Acevedo Cifuentes,Sandra Milena Builes Felizzola,Carlos Andrés Ordó?ez Ante,Idalia Jacqueline López Sánchez
Revista Ingenierías Universidad de Medellín , 2011,
Abstract: En este artículo se muestran resultados de investigación obtenidos en la remoción de los metales pesados, plomo, níquel, cromo, cadmio y mercurio, presentes en una solución compuesta por licor mixto proveniente de la planta de tratamiento de aguas residuales de San Fernando y una solución preparada con metales pesados con una concentración conocida, mediante el uso de una batería de filtros empacados en zeolita clinoptilolita. La experimentación se desarrolló bajo condiciones controladas de caudal y pH, a temperatura ambiente. Se encontró que la eficiencia de los filtros bajo las condiciones específicas de dise o es significativamente alta en la remoción de los metales pesados evaluados en la solución acuosa. Se encontró, además, que sin importar el valor de la concentración inicial, se obtuvo una remoción importante en los contaminantes luego de pasar por los filtros con una mayor eficiencia en la remoción del mercurio. This article shows the research results on the removal of five heavy metals (lead, nickel, chromium, cadmium and mercury) present in a liquor made of a mixture of wastewater from San Fernando wastewater treatment plant and a solution prepared with known concentrations of heavy metals, using a series of batery filters packed with zeolita clinoptilolita. The experiments were run under controlled conditions of flow and pH, at room temperature. It was found that the removal efficiency was significantly high under the specified design conditions; also, it was found an important removal of the contaminants after passing through the filters, independently of the initial concentration, with the highest observed removal for mercury.
REMOCIóN DE MICROORGANISMOS PATóGENOS PRESENTES EN UN LICOR MIXTO BAJO CONDICIONES DE LABORATORIO EMPLEANDO FILTROS EMPACADOS EN ZEOLITA NATURAL REMOVAL OF PATHOGENIC MICROORGANISMS PRESENT IN MIXED LIQUOUR UNDER LABORATORY CONDITIONS BY USING FILTERS PACKED IN NATURAL ZEOLITE
Diana Rocío Acevedo Cifuentes,Sandra Milena Builes Felizzola,Carlos Andrés Ordo?ez Ante,Idalia Jacqueline López Sánchez
Revista Ingenierías Universidad de Medellín , 2012,
Abstract: En este artículo, se presentan los resultados obtenidos en la remoción de coliformes totales, coliformes fecales y salmonella-shigella, presentes en un licor mixto proveniente de la planta de tratamiento de aguas residuales San Fernando (Medellín, Colombia), mediante el uso de una batería de filtros empacados en zeolita clinoptilolita. La experimentación se desarrolló bajo condiciones controladas de caudal y pH, a temperatura ambiente. Se empleó zeolita natural tipo clinoptilolita la cual se activó con solución salina y secado, se empacó en una batería compuesta por dos filtros, uno de flujo descendente y otro de flujo ascendente, para facilitar el contacto de la solución contaminada y el material adsorbente (zeolita). Se realizaron cinco ensayos independientes y al final de cada uno de ellos se lavó y se activó el material zeolítico antes de comenzar el siguiente. En cada ensayo se tomaron tres muestras. Se encontró que la eficiencia de los filtros bajo las condiciones específicas de dise o fue significativamente alta en la remoción de los patógenos evaluados, y el porcentaje de remoción fue independiente del valor de la concentración a la entrada del filtro. Además, la eficiencia en la remoción de los patógenos evaluados no dependió del tipo de microorganismo. This article displays results obtained when total coliforms, fecal coliforms, and Salmonella shigella were removed from mixed liquor taken from San Fernando waste water treatment plant in Medellín, Colombia, by using a battery of filters packed in zeolite clinoptilolite. Experiments were developed under controlled conditions of flow and pH at room temperature. Natural clinoptilolite-type zeolite was used activated with saline solution and drying; it was packed in a battery consisting of two filters (a downward-flow filter and an upward-flow filter) in order to make contact of contaminated solution and adsorbent material (zeolite) easier. Five independent tests were conducted and zeolite matter was washed and activated at the end of each test before starting the next one. Three samples were taken in each test. It was found that efficiency of filters under specific conditions of design was significantly high when assessed pathogens were removed, and percentage of removal was independent from the concentration value at the filter entry. Besides, efficiency to remove pathogens assessed was not dependent on the type of microorganisms.
Estimación de la similitud semántica de tareas entre procesos de negocio de telecomunicaciones
Ordó?ez Ante,Leandro; Bastidas Narváez,Adriana X; Corrales,Juan Carlos;
Ingeniería y Ciencia , 2012,
Abstract: as a measure to improve competitiveness in the telecommunications market, currently companies in the sector create new value added services, in order to extend its services portfolio and to ensure either the retention of its customers or increase the number of its subscribers. these new services must rely on business processes defined by the telecommunications service provider, which are composed of operation, management, maintenance and support tasks. generally, telco architects reuse those tasks in order to optimize enterprise resource and to ensure prompt return on investment, amortizing over the shortest possible time the outgoings due to creation and deployment of the new service. the reuse of telco tasks involves constraints regarding the speed in selection, since usually, there are hundreds of tasks, and it requires the intervention of technical staff to carry out the recovery operations, based on their subjective interpretation of the business process to be implemented. there exist different approaches to automate the resources selection, generally focused on the semantic matching of concepts that describe their access interfaces (inputs and outputs); however, is shown that the application of these techniques omits relevant information contained in other attributes, such as identifiers. for this reason, this paper proposes a mechanism to determine the semantic similarity of tasks that make up telecommunications business processes, considering two perspectives: the inference on the tasks functionality specified in identifiers, and coverage analysis of inputs and outputs.
Semantic similarity estimation of tasks between telecommunications business processes Estimación de la similitud semántica de tareas entre procesos de negocio de telecomunicaciones
Leandro Ordó?ez Ante,Adriana X Bastidas Narváez,Juan Carlos Corrales
Ingeniería y Ciencia , 2012,
Abstract: As a measure to improve competitiveness in the telecommunications market, currently companies in the sector create new value added services, in order to extend its services portfolio and to ensure either the retention of its customers or increase the number of its subscribers. These new services must rely on business processes de ned by the Telecommunications Service Provider, which are composed of operation, management, maintenance and support tasks. Generally, Telco Architects reuse those tasks in order to optimize enterprise resource and to ensure prompt return on investment, amortizing over the shortest possible time the outgoings due to creation and deployment of the new service. The reuse of Telco tasks involves constraints regarding the speed in selection, since usually, there are hundreds of tasks, and it requires the intervention of technical sta to carry out the recovery operations, based on their subjective interpretation of the business process to be implemented. There exist di erent approaches to automate the resources selection, generally focused on the semantic matching of concepts that describe their access interfaces (inputs and outputs); however, is shown that the application of these techniques omits relevant information contained in other attributes, such as identi ers. For this reason, this paper proposes a mechanism to determine the semantic similarity of tasks that make up telecommunications business processes, considering two perspectives: the inference on the tasks functionality speci ed in identi ers, and coverage analysis of inputs and outputs. Como una medida para mejorar la competitividad en el mercado de las telecomunicaciones, actualmente las empresas del sector crean nuevos servicios de valor agregado, con el fin de ampliar su portafolio de servicios y garantizar bien sea la permanencia de sus clientes o ampliar el número de suscriptores. Estos nuevos servicios deben estar soportados en los procesos de negocio definidos por el Operador Telecomunicaciones, los cuales están compuestos por tareas de operación, gestión, mantenimiento y soporte. Habitualmente los Arquitectos Telco reutilizan dichas tareas con el objetivo de optimizar los recursos de la empresa y garantizar la rápida recuperación de la inversión, amortizando en el menor tiempo posible los gastos de creación y despliegue del nuevo servicio.La reutilización de tareas Telco presenta limitaciones en cuanto a la agilidad en la selección, ya que normalmente existen cientos de tareas y se requiere de la intervención de personal técnico que lleve a cabo las funciones
Seguimiento a patógenos presentes en biosólido empleado como enmienda para revegetalizar un talud
López Sánchez,Idalia Jacqueline; Acevedo Cifuentes,Diana Rocío; Ordó?ez Ante,Carlos Andrés;
Revista Ingenierías Universidad de Medellín , 2010,
Abstract: in order to evaluate the feasibility of biosolids use as an organic emendation for reforestation and controlling active superficial erosive processes, a part of the highway -located near to the alternative route to caldas (antioquia). with the purpose of preventing erosion, two types of plants brachiaria decumbens and kikuyu grass (pennisetum clandestinum) were planted, using biosolids from san fernando water treatment plant, mixed with soil from the site. the behavior of some environmental risk bioindicators: total coliforms, fecal coliforms, salmonella-shiguella, were evaluated, in runoff waters and in the slope soil across the time. both plant species adapted well to soil; the coverage was complete and permanent. results show the feasibility of bio-solid as emendation. however, microbiological specifications measured during the evaluation time, showed the need for sanitizing the bio-solid before mixing it with soil, since the presence of these pathogens represents an environmental risk.
Seguimiento a patógenos presentes en biosólido empleado como enmienda para revegetalizar un talud Follow-up to pathogens present in biosolids used as emendation to reforest a slope
Idalia Jacqueline López Sánchez,Diana Rocío Acevedo Cifuentes,Carlos Andrés Ordó?ez Ante
Revista Ingenierías Universidad de Medellín , 2010,
Abstract: Con el fin de evaluar la factibilidad del uso del biosólido como enmienda orgánica para el establecimiento de vegetación y el control de procesos erosivos superficiales activos, se seleccionó un corte de carretera ubicado sobrela Variante a Caldas (Antioquia). Para darle amarre y cobertura al suelo, se sembraron dos especies vegetales tipo pasto Brachiaria Decumbens y Kikuyo (Pennisetum clandestinum), utilizando biosólido proveniente de la PTAR San Fernando, mezclado con suelo de la zona. Se evaluó el comportamiento de bioindicadores de riesgo ambiental: coliformes totales, coliformes fecales, Salmonella-Shiguella, en las aguas de escorrentía y en el suelo del talud en el tiempo. Ambas especies se adaptaron bien amarrando el suelo; la cobertura fue total y permanente. Los resultados muestran la factibilidad del uso del biosólido como enmienda. Sin embargo, la permanencia de los parámetros microbiológicos medidos durante el tiempo de evaluación evidencia la necesidad de sanitizar el biosólido antes de usarlo, ya que estos patógenos constituyen un riesgo ambiental. In order to evaluate the feasibility of biosolids use as an organic emendation for reforestation and controlling active superficial erosive processes, a part of the highway -located near to the alternative route to Caldas (Antioquia). With the purpose of preventing erosion, two types of plants Brachiaria Decumbens and kikuyu grass (Pennisetum clandestinum) were planted, using biosolids from San Fernando Water Treatment Plant, mixed with soil from the site. The behavior of some environmental risk bioindicators: total coliforms, fecal coliforms, Salmonella-Shiguella, were evaluated, in runoff waters and in the slope soil across the time. Both plant species adapted well to soil; the coverage was complete and permanent. Results show the feasibility of bio-solid as emendation. However, microbiological specifications measured during the evaluation time, showed the need for sanitizing the bio-solid before mixing it with soil, since the presence of these pathogens represents an environmental risk.
Efecto del suplemento de aceites vegetales sobre el perfil lipídico en ratas Wistar
Poveda,Elpidia; Ayala,Paola; Rodríguez,Milena; Ordó?ez,Edgar; Baracaldo,Cesar; Delgado,Willman; Guerra,Martha;
Biomédica , 2005,
Abstract: introduction: some effects on the lipid profile, due to the action of tocopherols, tocotrienols and saturated, mono and polyunsaturated fatty acids, have been reported. objective: to evaluate the effect of vegetable oil consumption of high use in colombia (palm, soy, corn, sunflower, and canola), on blood concentrations of triglycerides (tg), total cholesterol (tc) and hdl cholesterol (hdl-c) on male wistar rats. methods: the content of tocopherols, tocotrienols, and fatty acids in oils was quantified by high performance liquid chromatography (hplc). animals were supplemented with 0.2 ml/day of oil. weekly and during 4 weeks groups of animals were sacrificed, according to their treatment group, and blood samples were obtained to quantify tc, tg and hdl-c. data were analyzed according to mean, standard deviation, anova and bonferroni comparisons tests. results: the oils no affected the tg except in the control and the soy group in the third treatment week. a decrease tendency on the palm group and increase tendency on sunflower and canola groups were observed. no significant differences in tc were observed. in hdl-c significant differences were present on every treatment week (p= 0,005) and besides a decrease tendency on palm group and an increase tendency on sunflower and corn groups were observed. conclusion: the oils change the lipid profile; a small amount of saturate fatty acids, the tocopherol and tocotrienol content are favourable for the hdl-c increase, and probably the tocorienols decrease the tg and attenuate the unfavourable effects of saturate fatty acids.
MODELO DE INTERPOLACIóN ESPACIAL MEDIANTE SISTEMAS DE INFORMACIóN GEOGRáFICA PARA EL ESTUDIO DE LA VARIABILIDAD ESPACIAL DE LA RESISTENCIA A LA PENETRACIóN DEL SUELO
LONDO?O CIRO,LIBARDO ANTONIO; RAMíREZ BOLíVAR,JOSé RODRIGO; RAMíREZ BOLíVAR,GLORIA ISABEL; ORDó?EZ ANTE,CARLOS ANDRéS;
DYNA , 2010,
Abstract: between 1993 and 2005, there have been numerous studies of soils in a wide sector of the laureles neighborhood ( medellin, antioquia, colombia ), which have aimed to identify the stratigraphy of the area and determine the bearing capacity of soil. field tests and laboratory examinations realized during these explorations are resistance to the standard penetration (standard penetration test) spt and resistance laboratory tests to simple compression. this data was evaluated by a process of georeferencing for specific depths of 2.5, 5.0 and 7.5 meters for the spt test and 2.30 and 3.30 meters for simple compression tests. using geostatistical techniques (spatial interpolation) surfaces were modeled for the study area, in order to find information on locations where there have not been studies of soils
MODELO DE INTERPOLACIóN ESPACIAL MEDIANTE SISTEMAS DE INFORMACIóN GEOGRáFICA PARA EL ESTUDIO DE LA VARIABILIDAD ESPACIAL DE LA RESISTENCIA A LA PENETRACIóN DEL SUELO
LIBARDO ANTONIO LONDO?O CIRO,JOSé RODRIGO RAMíREZ BOLíVAR,GLORIA ISABEL RAMíREZ BOLíVAR,CARLOS ANDRéS ORDó?EZ ANTE
DYNA , 2010,
Abstract: Entre 1993 y 2005, se han realizado numerosos estudios de suelos en un amplio sector del barrio Laureles (Medellín, Departamento de Antioquia, Colombia), que han tenido como objeto la identificación de la estratigrafía de la zona y la determinación de la capacidad portante del suelo. Los ensayos de campo y laboratorio realizados durante estas exploraciones son resistencia a la penetración estándar (Standar Penetration Test) SPT y ensayos de laboratorio de resistencia a la compresión simple. A estos datos se les realizó un proceso de georeferenciación para profundidades especificas de 2.5, 5.0 y 7.5 metros para el ensayo SPT, y 2.30 y 3.30 metros para los ensayos de compresión simple. Mediante el uso de técnicas geoestadísticas (interpolación espacial), se modelaron superficies para el área en estudio, con el propósito de encontrar información en locaciones en las cuales no se han realizado estudios de suelos.
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