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Comparative study of PAH removal efficiency under absence of molecular oxygen: effect of electron acceptor and hydrodynamic conditions

Uribe-Jongbloed, Alberto; Bishop, Paul L. (Canadá, 2007)

A series of experiments were made in order to compare the removal efficiency of a mixture of four PAHs (naphthalene, phenanthrene, pyrene, and benzo[a]pyrene), under different electron acceptor (NO3 −, SO4 −2) and hydrodynamic ...
Implementación de Buque Hospital en Colombia

Herrera Briceño, Karen Viviana (Ingeniería BiomédicaBogotáIngeniería Biomédica, 2021)

Esta propuesta busca a través de programas de prevención y promoción lograr apoyar la gestión del Estado Colombiano para mejorar la calidad de vida de las comunidades más alejadas que carecen de un servicio de salud adecuado, ...
Determination of biochemical and physical conditions of plastics denominated as “biodegradable” subjected to anaerobic conditions

Uribe-Jongbloed, Alberto; Albarracín López, Lorena Isabel; Puentes Parodi, Jaime Alejandro (2012)

The main objective of the study was to determine the biochemical and physical conditions of two different types of polymeric materials (HDPE with oxo-additive and PLA) when subjected to conditions similar to those presented ...
Electronic Device for Satellite Backup of Automatic Vehicle Location Equipment Using the Iridium Network

Paz Penagos, Hernán; Guerrero Rodríguez, Néstor (Bogotá, 2020)

Context: This paper presents the design and development of an electronic device that operates as a satellite backup channel for automatic vehicle location (AVL) equipment, whose only communication channel is the cellular ...
Escenarios energéticos a 2050 con integración de fuentes de energía eléctrica renovables en Colombia

Moreno-Chuquen, Ricardo; Ducuara Barrera, Yuliana; Rojas Góngora, Angélica (Colombia, 2015-11-13)

Este artículo construye y analiza tres escenarios energéticos en Colombia para explorar el impacto de la integración de fuentes de energía eléctrica que utilizan recursos renovables en escenarios a largo plazo incluyendo ...

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Comparative study of PAH removal efficiency under absence of molecular oxygen: effect of electron acceptor and hydrodynamic conditions
...
Uribe-Jongbloed, Alberto | 2007

A series of experiments were made in order to compare the removal efficiency of a mixture of four PAHs (naphthalene, phenanthrene, pyrene, and benzo[a]pyrene), under different electron acceptor (NO3 −, SO4 −2) and hydrodynamic conditions (stagnation and high shear). In all cases naphthalene showed the highest removal efficiency (from 69% up to 100%) as compared with the other PAHs. The fastest rate was obtained for the denitrifying-high shear condition followed by denitrification-no shear, sulfate-reduction-high shear and the lowest for sulfate reduction-no shear. However, most of the perceived removal of the heavier PAHs could be due to aging. No lag time was observed for the denitrifying experiments, and the denitrification rate was the same regardless of the hydrodynamic condition. A lag time of 64 d was observed under conditions of sulfate reduction and high shear. Sulfate reduction did not commence under no shear conditions. No toxic effect was observed for the four PAH mixture under all the conditions tested.

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Implementación de Buque Hospital en Colombia
...
Herrera Briceño, Karen Viviana | 2021

Esta propuesta busca a través de programas de prevención y promoción lograr apoyar la gestión del Estado Colombiano para mejorar la calidad de vida de las comunidades más alejadas que carecen de un servicio de salud adecuado, inicialmente en las poblaciones que se encuentran cercanas al rio Magdalena, partiendo desde Barranquilla hasta la Dorada, Caldas, cubriendo estas zonas con la ayuda de un buque hospital con tecnología de punta para brindar las mejores atenciones médicas y suplir con las necesidades que se encuentren en estas poblaciones.

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Determination of biochemical and physical conditions of plastics denominated as “biodegradable” subjected to anaerobic conditions
...
Uribe-Jongbloed, Alberto | 2012

The main objective of the study was to determine the biochemical and physical conditions of two different types of polymeric materials (HDPE with oxo-additive and PLA) when subjected to conditions similar to those presented inside a sanitary landfill. These materials are commercialized within the country claiming to be biodegradable under certain conditions. However, the conditions in which such degradation may occur are completely unknown from those presented inside s solid waste final disposal site (sanitary landfill). The experiment simulated the general conditions to which the materials would be subjected once inside a sanitary landfill, (absence of molecular oxygen, absence of light, constant temperature, high humidity, among others). Changes in biochemical and physical conditions were monitored as well as the container. These changes may indicate degradation of the polymers. Along the experiment, not enough evidence could be observed that doubtlessly showed actual biodegradation in any of the plastic materials tested.

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Electronic Device for Satellite Backup of Automatic Vehicle Location Equipment Using the Iridium Network
...
Paz Penagos, Hernán | 2020

Context: This paper presents the design and development of an electronic device that operates as a satellite backup channel for automatic vehicle location (AVL) equipment, whose only communication channel is the cellular network. Method: The design, manufacture and assembly of the hardware followed 4 phases, and it was aligned with the IPC 2221 standard. This allowed improving the design experience and guaranteed the correct electrical operation in the final product. Results: The information sent by the developed device corresponds to the data generated by the AVL device, which indicates that the information processing was correctly designed. Additionally, it was possible to obtain a functional and versatile device in which the blocks were correctly integrated; its firmware was designed to receive future updates that improved and expanded its capacity and compatibility with other devices. Conclusions: The final product, which works with the Iridium network, seeks to satisfy the technological requirements of the freight transport sector in Colombia with a low-cost, versatile, and easily integrated solution. The implementation of this type of technologies expands the capacity of tracking mobile assets, even in places where there is no cellular network coverage.

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Escenarios energéticos a 2050 con integración de fuentes de energía eléctrica renovables en Colombia
...
Moreno-Chuquen, Ricardo | 2015-11-13

Este artículo construye y analiza tres escenarios energéticos en Colombia para explorar el impacto de la integración de fuentes de energía eléctrica que utilizan recursos renovables en escenarios a largo plazo incluyendo impacto medio ambiental. Los escenarios energéticos prospectivos permiten determinar evidencias del nivel de integración de las fuentes de energía eléctrica renovables en el sistema interconectado nacional acorde a decisiones de políticas energéticas en el corto y mediano plazo. Un escenario considera la evolución usual sin considerar la integración de recursos renovables considerando únicamente la inclusión de nuevas centrales térmicas a carbón y gas natural. Los otros escenarios consideran aspectos que dilucidan la integración de fuentes no convencionales de energía a diferentes niveles según decisiones en el corto plazo acerca de la planeación de integración de nuevas fuentes tanto convencionales como no convencionales.

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Comparative study of PAH removal efficiency under absence of molecular oxygen: effect of electron acceptor and hydrodynamic conditions

Implementación de Buque Hospital en Colombia

Determination of biochemical and physical conditions of plastics denominated as “biodegradable” subjected to anaerobic conditions

Electronic Device for Satellite Backup of Automatic Vehicle Location Equipment Using the Iridium Network

Escenarios energéticos a 2050 con integración de fuentes de energía eléctrica renovables en Colombia

Envíos recientes

Comparative study of PAH removal efficiency under absence of molecular oxygen: effect of electron acceptor and hydrodynamic conditions

Implementación de Buque Hospital en Colombia

Determination of biochemical and physical conditions of plastics denominated as “biodegradable” subjected to anaerobic conditions

Electronic Device for Satellite Backup of Automatic Vehicle Location Equipment Using the Iridium Network

Escenarios energéticos a 2050 con integración de fuentes de energía eléctrica renovables en Colombia

Repositorio Escuela Colombiana de Ingeniería Julio Garavito

Communities in DSpace

Recently Added

Comparative study of PAH removal efficiency under absence of molecular oxygen: effect of electron acceptor and hydrodynamic conditions ﻿

Implementación de Buque Hospital en Colombia ﻿

Determination of biochemical and physical conditions of plastics denominated as “biodegradable” subjected to anaerobic conditions ﻿

Electronic Device for Satellite Backup of Automatic Vehicle Location Equipment Using the Iridium Network ﻿

Escenarios energéticos a 2050 con integración de fuentes de energía eléctrica renovables en Colombia ﻿

Envíos recientes

Comparative study of PAH removal efficiency under absence of molecular oxygen: effect of electron acceptor and hydrodynamic conditions

Implementación de Buque Hospital en Colombia

Determination of biochemical and physical conditions of plastics denominated as “biodegradable” subjected to anaerobic conditions

Electronic Device for Satellite Backup of Automatic Vehicle Location Equipment Using the Iridium Network

Escenarios energéticos a 2050 con integración de fuentes de energía eléctrica renovables en Colombia

Comparative study of PAH removal efficiency under absence of molecular oxygen: effect of electron acceptor and hydrodynamic conditions

Implementación de Buque Hospital en Colombia

Determination of biochemical and physical conditions of plastics denominated as “biodegradable” subjected to anaerobic conditions

Electronic Device for Satellite Backup of Automatic Vehicle Location Equipment Using the Iridium Network

Escenarios energéticos a 2050 con integración de fuentes de energía eléctrica renovables en Colombia