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Articles 331 - 347 of 347
Full-Text Articles in Environmental Engineering
An Improved Biosolid Gasifier Model, Hannah Mclean
An Improved Biosolid Gasifier Model, Hannah Mclean
Electronic Theses and Dissertations
As populations increase and cities become denser, the production of waste, both sewage sludge and food biomass, increases exponentially while disposal options for these wastes are limited. Landfills have minimal space for biosolids; countries are now banning ocean disposal methods for fear of the negative environmental impacts. Agricultural application of biosolids cannot keep up with the production rates because of the accumulation of heavy metals in the soils. Gasification can convert biosolids into a renewable energy source that can reduce the amount of waste heading to the landfills and reduce our dependence on fossil fuels. A recently published chemical kinetic …
Correlación Entre Los Parámetros Ambientales Convencionales Y La Presencia De Disruptores Endocrinos En El Río Bogotá A La Altura De Mosquera, Cundinamarca Según Su Incidencia En La Salud Pública De Este Municipio, Diana Paola Garzón Villarraga, Diego Andrés Guzmán Barragán
Correlación Entre Los Parámetros Ambientales Convencionales Y La Presencia De Disruptores Endocrinos En El Río Bogotá A La Altura De Mosquera, Cundinamarca Según Su Incidencia En La Salud Pública De Este Municipio, Diana Paola Garzón Villarraga, Diego Andrés Guzmán Barragán
Ingeniería Ambiental y Sanitaria
El presente proyecto se realizó teniendo en cuenta que en Colombia la investigación acerca de los Disruptores Endocrinos (Sustancias que afectan el equilibrio del sistema endocrino) desde el punto de vista ambiental es casi nula, pues no se le ha dado la importancia suficiente a un tema que a mediano plazo se puede convertir en un problema de salud pública irreversible. En esta investigación se analizaron parámetros ambientales de amplia utilización como el pH, temperatura, turbiedad, oxígeno disuelto (OD), conductividad, demanda biológica de oxigeno (DBO), demanda química de oxígeno (DQO), sólidos suspendidos, grasas y aceites, sólidos sedimentables, con la presencia …
Determinación De La Cl50 Para Un Vertimiento Proveniente De Una Empresa Indumotora Utilizando Organismos Del Género Daphnia, Ángela María Avendaño Andrade, Liliana Mora Araque
Determinación De La Cl50 Para Un Vertimiento Proveniente De Una Empresa Indumotora Utilizando Organismos Del Género Daphnia, Ángela María Avendaño Andrade, Liliana Mora Araque
Ingeniería Ambiental y Sanitaria
Con esta investigación se determinó la concentración letal media de un vertimiento con contenido de detergentes proveniente de una empresa indumotora, por medio de bioensayos de toxicidad acuática realizados utilizando organismos Daphnia pulex. Se realizó el respectivo montaje para la supervivencia del cultivo, estos, se aclimataron durante 15 días y después se retuvieron en las instalaciones de los laboratorios de la Universidad de la Salle con fines de realizar las pruebas donde se obtuvo el valor de sensibilidad de los organismos para verificar la respuesta de estos al vertimiento con contenido de detergentes. La preparación de las sustancias de referencia …
Análisis Preliminar De La Vocación De Los Suelos De La Finca San José De Matadepantano Yopal Casanare, Con Base En La Determinación De Sus Características Fisicoquímicas, Laura Stephania Agudelo Lemus, Andrés Felipe Torres Nieto
Análisis Preliminar De La Vocación De Los Suelos De La Finca San José De Matadepantano Yopal Casanare, Con Base En La Determinación De Sus Características Fisicoquímicas, Laura Stephania Agudelo Lemus, Andrés Felipe Torres Nieto
Ingeniería Ambiental y Sanitaria
No abstract provided.
Diagnóstico Ambiental: Gestión De Aceites De Cocina Usados En La Ciudad De Bogotá, Carlos Germán Ramos Villanueva
Diagnóstico Ambiental: Gestión De Aceites De Cocina Usados En La Ciudad De Bogotá, Carlos Germán Ramos Villanueva
Ingeniería Ambiental y Sanitaria
En este trabajo se analizó un diagnóstico ambiental, sobre la gestión del aceite de cocina usado en la ciudad de Bogotá, con el fin de identificar las falencias y problemas ocasionados por el aceite de cocina usado. Inicialmente se recopilo información de la manera: la gestión y el control que se está llevando en la actualidad por parte de las autoridades competentes, al aceite de cocina usado que produce tanto los grandes como los pequeños generadores, con el ánimo de conocer los actores involucrados en su gestión. Se solicitó información a las diferentes autoridades: la Secretaría Distrital de Ambiente (SDA), …
Análisis Del Irca Y Su Relación Con Variables Meteorológicas (Precipitación Y Temperatura) Y Ubicación Geográfica Para El Departamento De Boyacá En Los Años 2012-2013, Karen Julieth Doncel Sanabria, Nathaly Milena Forero Vásquez
Análisis Del Irca Y Su Relación Con Variables Meteorológicas (Precipitación Y Temperatura) Y Ubicación Geográfica Para El Departamento De Boyacá En Los Años 2012-2013, Karen Julieth Doncel Sanabria, Nathaly Milena Forero Vásquez
Ingeniería Ambiental y Sanitaria
Este estudio analizo el Índice de Riesgo de Calidad de Agua para consumo humano (IRCA) y su relación con el comportamiento de la precipitación y temperatura en el área geográfica comprendida por el departamento de Boyacá en el periodo 2012-2013. La ejecución del proyecto se dividió en seis fases: en la primera se elaboró una búsqueda o recopilación de información para el desarrollo del proyecto, además se definieron los criterios de selección de datos a analizar. Luego, en la segunda y tercera fase respectivamente se realizó la correlación entre parámetros que componen el IRCA y entre las variables meteorológicas precipitación …
Evaluación De La Huella Hídrica Del Cultivo Lirio Japonés Hemerocallis En La Vereda Ricaurte Del Municipio De Rondón, Boyacá, Yuri Stephani Vanegas Rojas, Lorena Margoth Vera Ramírez
Evaluación De La Huella Hídrica Del Cultivo Lirio Japonés Hemerocallis En La Vereda Ricaurte Del Municipio De Rondón, Boyacá, Yuri Stephani Vanegas Rojas, Lorena Margoth Vera Ramírez
Ingeniería Ambiental y Sanitaria
Colombia es uno de los países que posee una gran riqueza en biodiversidad y fuentes hídricas, siendo uno de los 10 países con mayor disponibilidad de este recurso en el mundo. Los seres humanos gastamos a diario agua para ducharnos, preparar alimentos, lavar los platos o la ropa, o simplemente para beberla directamente, pero también debemos saber que gastamos gran cantidad de agua en todo lo que consumimos (bienes, productos, servicios), ya que en su producción la requieren. La huella hídrica es utilizada como un indicador del uso de agua de los consumidores tanto domésticos como industriales, de forma directa …
Diagnóstico Y Análisis De Alternativas Para La Optimización Del Sistema De Acueducto De La Vereda De Chacua Del Municipio De Sibaté, Jairo Daniel Hernández Jiménez, Juan Sebastián García Pérez
Diagnóstico Y Análisis De Alternativas Para La Optimización Del Sistema De Acueducto De La Vereda De Chacua Del Municipio De Sibaté, Jairo Daniel Hernández Jiménez, Juan Sebastián García Pérez
Ingeniería Ambiental y Sanitaria
La vereda de Chacua se encuentra localizada en la zona rural del municipio de Sibaté, al sur de la ciudad de Bogotá y del municipio de Soacha; los servicios públicos con los cuales dispone la vereda son: electricidad y acueducto, ya que las dinámicas de desarrollo que ha sufrido la vereda, limitan la cobertura y prestación del servicio según lo establecido en la Ley 142 ; debido a su ubicación con respecto al municipio de Sibaté y a la ciudad de Bogotá, se ha observado un crecimiento poblacional significativo a lo largo de la última década en la vereda, lo …
Roadway Determinants Of Bicyclist Multi-Pollutant Exposure Concentrations, Alexander Y. Bigazzi, Miguel A. Figliozzi
Roadway Determinants Of Bicyclist Multi-Pollutant Exposure Concentrations, Alexander Y. Bigazzi, Miguel A. Figliozzi
Civil and Environmental Engineering Faculty Publications and Presentations
Due to poorly quantified traffic-exposure relationships, transportation professionals are unable to easily estimate exposure differences among bicycle routes for network planning, design, and analysis. This paper estimates the effects of roadway characteristics on bicyclist multi-pollutant exposure concentrations, controlling for meteorology and background conditions. Concentrations of volatile organic compounds (VOC), carbon monoxide (CO), and fine particulate matter (PM2.5) are modeled using high-resolution on-road data. This paper also compares exposure differences on immediately parallel high-traffic/low-traffic facilities and is the first study to quantify VOC exposure differences by facility. Results indicate that average daily traffic (ADT) provides a parsimonious way to characterize the …
Empirical Analysis Of Bus Bunching Characteristics Based On Bus Avl/Apc Data, Wei Feng, Miguel A. Figliozzi
Empirical Analysis Of Bus Bunching Characteristics Based On Bus Avl/Apc Data, Wei Feng, Miguel A. Figliozzi
Civil and Environmental Engineering Faculty Publications and Presentations
Bus bunching takes place when headways between buses are irregular. Bus bunching is associated with longer waiting times for riders, overcrowding in some buses, and an overall decrease on the level of service and capacity. Understanding the temporal and spatial characteristics and the causes and effects of bus bunching incidents from archived bus data can greatly aid transit agencies to develop efficient mitigation strategies. This paper presents methods to identify and visualize specific time periods and segments where bus bunching incidents occur based on automatic vehicle location (AVL) and automatic passenger count (APC) data. The paper also proposes methods that …
Does The Bicycle Detector Symbol Change Cyclist Queuing Position At Signalized Intersections?, Stefan W. Bussey, Christopher M. Monsere, Peter Koonce
Does The Bicycle Detector Symbol Change Cyclist Queuing Position At Signalized Intersections?, Stefan W. Bussey, Christopher M. Monsere, Peter Koonce
Civil and Environmental Engineering Faculty Publications and Presentations
The Manual of Traffic Control Devices (MUTCD) includes a bicycle detector pavement marking (Section 9C-05) and accompanying explanatory sign (R10-22) which may encourage cyclists to position themselves over detection at traffic signals. This paper presents the results of an observational and survey- based study evaluating the bicycle detector marking. Three minor actuated approaches at signalized intersections with significant bicycle volumes and without bicycle detector markings were selected for treatment. Three configurations were compared: 1) bicycle detector marking only 2) bicycle detector marking with the R10-22 explanatory sign, and 3) an alternative bicycle detector installed over a contrasting green rectangle. Analysis …
Tides And The Swot Mission: Transition From Science Definition Team To Science Team, Brian K. Arbic, Florent Lyard, Aurelien Ponte, Richard D. Ray, James G. Richman, Jay F. Shriver, Edward Zaron, Zhongxiang Zhao
Tides And The Swot Mission: Transition From Science Definition Team To Science Team, Brian K. Arbic, Florent Lyard, Aurelien Ponte, Richard D. Ray, James G. Richman, Jay F. Shriver, Edward Zaron, Zhongxiang Zhao
Civil and Environmental Engineering Faculty Publications and Presentations
As the SWOT wide-swath satellite altimeter mission transitions from the Science Definition Team to the Science Team, it is an opportune time to review the progress that has been made with respect to tides, and the work remaining to be done. As with previous altimeter missions, tides present both an opportunity and a challenge for the SWOT mission. The TOPEX/Jason class of altimeters have allowed high-accuracy mapping of open-ocean barotropic tides over their coverage latitudes (66°S to 66°N), but the inter-track spacing of these missions (~150 km) has limited their ability to map smaller-scale features such as shelf tides, coastal …
Adjusting Ite’S Trip Generation Handbook For Urban Context, Kelly J. Clifton, Kristina Marie Currans, Christopher D. Muhs
Adjusting Ite’S Trip Generation Handbook For Urban Context, Kelly J. Clifton, Kristina Marie Currans, Christopher D. Muhs
Civil and Environmental Engineering Faculty Publications and Presentations
This study examines the ways in which urban context affects vehicle trip generation rates across three land uses. An intercept travel survey was administered at 78 establishments (high-turnover restaurants, convenience markets, and drinking places) in the Portland, Oregon, region during 2011. This approach was developed to adjust the Institute of Transportation Engineers (ITE) Trip Generation Handbook vehicle trip rates based on built environment characteristics where the establishments were located. A number of policy-relevant built environment measures were used to estimate a set of nine models predicting an adjustment to ITE trip rates. Each model was estimated as a single measure: …
Zespół Energii Odnawialnej I Zrównoważonego Rozwoju (Eozr), Wojciech M. Budzianowski
Zespół Energii Odnawialnej I Zrównoważonego Rozwoju (Eozr), Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
Potential Of Metal Recovery From Coal Combustion Products. Part I. Physicochemical Characterization, Dariusz Bradlo, Witold Zukowski, Piotr Czuprynski, Konrad Jura
Potential Of Metal Recovery From Coal Combustion Products. Part I. Physicochemical Characterization, Dariusz Bradlo, Witold Zukowski, Piotr Czuprynski, Konrad Jura
Witold Zukowski
The paper presents physicochemical characteristic of coal combustion products: fly ashes from three stages of electrostatic dust collecting system (FAI, FAII, FAIII), slag (S) and slurry from wet flue gas desulphurization (S-wFGD). Fly ashes are classifi ed as ‘siliceous’ or ‘sialic-high acid’. Th e concentrations of selected heavy metals indicate that their values increase in accordance with consecutive stages of dust collecting system. Fly ash FAIII and slurry from wet FGD have the largest heavy metals content. The results show the increment of lanthanides and ittrium (REY) contents in CCPs from slag, through FAII and FAI to S-wFGD and FAIII.
Potential Of Metal Recovery From Coal Combustion Products. Part Ii. Leaching Of Selected Elements, Dariusz Bradlo, Witold Zukowski, Piotr Czuprynski, Karol Witkowski
Potential Of Metal Recovery From Coal Combustion Products. Part Ii. Leaching Of Selected Elements, Dariusz Bradlo, Witold Zukowski, Piotr Czuprynski, Karol Witkowski
Witold Zukowski
The paper presents leaching results of coal combustion products: fly ashes from the three stages of dust collecting system, slag and slurry from wet fl ue gas desulphurization. The static leaching method was used at room temperature, at a pH value of 1, 4, 7, 10 and 13 for 10 days. H2SO4 and NaOH were added as extraction media and L/S ratio was set to the value of 10. The highest recovery ratio was attained during leaching at a pH value of 1 for fly ash from the third stage of dust collecting system and slurry.
Peat And Coconut Fiber As Biofilters For Chromium Adsorption From Contaminated Wastewaters, Henryk Koloczek, Jaroslaw Chwastowski, Witold Zukowski
Peat And Coconut Fiber As Biofilters For Chromium Adsorption From Contaminated Wastewaters, Henryk Koloczek, Jaroslaw Chwastowski, Witold Zukowski
Witold Zukowski
Batch adsorption experiments were performed for the removal of chromium (III) and chromium (VI) ions from aqueous solutions using Canadian peat and coconut fiber. The Langmuir model was used to describe the adsorption isotherm. The maximum adsorption for peat reached 18.75 mg/g for Cr(III) and 8.02 mg/g for Cr(VI), whereas the value for fiber was slightly higher and reached 19.21 mg/g for Cr(III) and 9.54 mg/g for Cr(VI). Both chromium forms could be easily eluted from the materials. The adsorption of chromium forms to organic matter could be explained in terms of formation of donor-acceptor chemical covalent bound with hydroxyl …