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Waste cooking oil logistics and environmental assessment for biodiesel production in Cali

Abstract: The present article analyzes different strategies for collecting Waste Cooking Oil (WCO) to produce biodiesel in Santiago de Cali. The quantitative and qualitative analysis of the models found in the literature highlighted the main characteristics for develop

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A model for solving vehicle scheduling problems: a case study

Abstract: In this work we formulate a model to solve a type of vehicle scheduling problem, derived from the operation of the mass transit system (MIO) in Cali city, Colombia. Four companies operate the system with 3 types of buses and four depots. Two kinds of tasks sh

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Heuristic parameter estimation for a continuous fermentation bioprocess

Abstract: Zymomonas mobilis continuous fermentation bioprocess has the ability of producing energy from glucose catabolism, which promises a relevant application for biomass conversion into fuel, and therefore it represents an industrial scale production alternative fo

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Hydro-dynamic modeling for identification of flooding zones in the city of Tunja

Abstract: The present article elaborates a hydrological and hydraulic model of the Jordán and the Vega rivers in the environs of the city of Tunja in order to enable the identification of potential flood zones. The first model was implemented in HEC - HMS together with

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Model for the prediction of noise from wind turbines

Abstract: This article presents a prediction model that can be applied to estimate the propagation of noise generated by wind turbines through an easy calculation procedure. The proposed prediction model is semi-empirical and based on the analysis of phenomena related

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Reduction process of low-grade nickel laterite agglomerates using different carbonaceous materials

Abstract: Lateritic nickel ores need to be reduced to obtain direct reduced iron and nickel alloy. During processing of lateritic nickel ores in rotary kilns, there is a great loss of fines of ores due to degradation during transport into the reactor. These fines conta

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Limonene epoxidation in aqueous phase over Ti/KIT-6

Abstract: Limonene epoxidation was carried out in the liquid phase using Ti/KIT-6 as the catalyst and tert-butyl hydroperoxide as oxidant. The best selectivity (60%) was obtained at 50 °C after 7 h of reaction, and the conversion was 23%. The main side products were ca

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Evaluating the scale-up of a reactor for the treatment of textile effluents using Bjerkandera sp

Abstract: Effluents from the textile industry have a negative environmental impact due to their high load of dyes and hard-to-remove compounds: additives, detergents, and surfactants; these must be treated before effluents can be discharged into water. White-rot fungi

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Single pixel compressive spectral polarization imaging using a movable micro-polarizer array

Abstract: The acquisition of spectral polarization images is a method that obtains polarized, spectral and spatial information of a scene. Traditional acquisition methods use Dynamic elements that capture all the information of a scene, by scanning the areas of interes

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‘Worst Month’ and ‘Critical Period’ Methods for the Sizing of Solar Irrigation Systems - A Comparison

Abstract: Despite the fact that solar photovoltaic (PV) water pumping systems, in particular, irrigation systems have been in use for more than 40 years, there remains a need for their improvement and development. The sizing of such systems is very important in terms o

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