Examinando por Autor "Urbina-Suarez, N A"
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- PublicaciónAcceso abiertoAnalysis of the biodiesel production yield from waste frying oil(2018) Acevedo-Páez, Juan Camilo; Urbina-Suarez, N A; Acevedo, A.Z.; Becerra, L.C.; Arenas, E.This research sought to produce biodiesel from waste frying oil (WFO) from chicken grills by using chemical transesterification to evaluate quality conditions and the yield of the biodiesel obtained. For this, acid esterification and basic transesterification were applied under the following conditions: reaction temperature 60°𝐶, catalyst concentration of 1% (m/m) KOH, oil:alcohol 1: 6 𝑚𝑜𝑙𝑎𝑟 𝑟𝑎𝑡𝑖𝑜, and two reaction times (55 𝑎𝑛𝑑 70𝑚𝑖𝑛) for the transesterification. The physicochemical properties of the raw material were analyzed (i.e., density, humidity, kinematic viscosity, fatty acid profile, acidity index, peroxides, and saponification) where the WFO showed high contents of oleic acid (42.45%) and palmitic acid (33.52%), which are fundamental for biodiesel production. Chemical transesterification under the conditions of 60°𝐶, 1% KOH, and 70𝑚𝑖𝑛 obtained the best yield by presenting a high conversion percentage (96.15%) and an acid number of 1.33𝑚𝑚𝐾𝑂𝐻/𝑔, according to ASTM D6751 and EN 14214 international standards.
- PublicaciónAcceso abiertoBioconversion of post-culture wastewater from farm fisheries for the production of high-value algal biomass(Journal of Physics: Conference Series, 2019-11-01) Gámez-Ortiz, Lorainis Paola; González-Soto, Maria Johana; Perez-Roa, M E; García-Martinez, J B; Urbina-Suarez, N A; Diaz Castañeda, Claudia-ElizabethPost-consumption water from inland fisheries possesses a tremendous environmental impact on aquatic ecosystems due to their high load of nutrients such as Nitrates, Phosphates, Urea and organic load. Due to the high cost of current water treatment systems, most of the waters from inland fisheries are discharged without any treatment, thus generating a significant environmental impact in rivers of different localities. Cyanobacteria are a group of photosynthetic microorganisms that can grow in different environments including wastewater. Among the most industrially exploited cyanobacteria, Spirulina (Arthrospira) maxima is the most relevant microorganism, due to its capacity to produce large quantities of protein and colourants (especially phycocyanins) for the food and feed industry. The objective of this project is to determine the maximum production capacity of Spirulina in post-consumption waters of fish farming as a system for the treatment of this type of water through the biological capture of the various nutrients and the production of biomass of industrial interest. S. maxima was produced on 3 different media (wastewater + Zarouk, wastewater + K2HPO4, NaNO3, NaHCO3 and wastewater without any modification) for 30 days. Results shown that S. maxima can effectively grow on wastewater supplemented with NaNO3 (2.5 g/L), NaHCO3 (16.8 g/L) and K2HPO4 (0.5 g/L) to obtain up to 1.18 g/L of total biomass and 0.23 g/L of phycocianins. The scaling of culture at 10 L showed a minimal reduction on final biomass and phycocyanin (1.05 and 0.21 g/L respectively), this result indicates that the production of biomass and phycobiliproteins from S. maxima in wastewater from inland fisheries can be a possible candidate for the simplification of biomass and high-value metabolites process production.
- PublicaciónAcceso abiertoEnzymatic transesterification ofwaste frying oil from local restaurants in east colombia using a combined lipase system(MDPI, 2020-05-21) Ferreira-Vela, Mary Angélica; Acevedo-Páez, Juan Camilo; Urbina-Suarez, N A; Rangel-Basto, Yeily Adriana; González-Delgado, Ángel Darío; EurekaThe search for innovation and biotechnological strategies in the biodiesel production chain have become a topic of interest for scientific community owing the importance of renewable energy sources. This work aimed to implement an enzymatic transesterification process to obtain biodiesel from waste frying oil (WFO). The transesterification was performed by varying reaction times (8 h, 12 h and 16 h), enzyme concentrations of lipase XX 25 split (14%, 16% and 18%), pH of reaction media (6, 7 and 8) and reaction temperature (35, 38 and 40 °C) with a fixed alcohol–oil molar ratio of 3:1. The optimum operating conditions were selected to quantify the amount of fatty acid methyl esters (FAMEs) generated. The highest biodiesel production was reached with an enzyme concentration of 14%, reaction time of 8 h, pH of 7 and temperature of 38 °C. It was estimated a FAMEs production of 42.86% for the selected experiment; however, best physicochemical characteristics of biodiesel were achieved with an enzyme concentration of 16% and reaction time of 8 h. Results suggested that enzymatic transesterification process was favorable because the amount of methyl esters obtained was similar to the content of fatty acids in the WFO.
- PublicaciónAcceso abiertoPhysicochemical study of used frying oil as feedstock for the production of biodiesel(Journal of Physics: Conference Series, 2019-11-29) Acevedo-Páez, Juan Camilo; Urbina-Suarez, N A; Acevedo, A Z.; Becerra, L.C.Abstract A diagnosis was made of the availability and quality of the used frying oil of the establishments dedicated to chicken fry in the city of San José de Cúcuta, to evaluate its technical feasibility as a feedstock in the biodiesel production. A survey was applied to 21 restaurants, evidencing that they reuse the oil less times when having a high monthly consumption (i.e. more than 80 liters, contrary to those consuming less than 60 liters, which reuse the oil more than 3 times. As a final disposition, 86% of establishments sell the used frying oil at $750/liter and 14% deliver it to be used by external persons. The physicochemical properties of used frying oil were analyzed as: fatty acid profile, density, moisture content, refractive index, acidity index, peroxide index and saponification index. The used frying oil presented high content of oleic acid (42.45%) and palmitic acid (33.52%), converting it into a potential feedstock by presenting fatty acids characteristics from palm oil, which is the main source for the production of biodiesel in Colombia. To improve the organoleptic characteristics of the used frying oil (dark colour, strong odour, emulsions), it was subjected to heating and filtering to remove the particles that affect the yield of biodiesel production.