Ciencia e Ingeniería en Alimentos y Biotecnología

URI permanente para esta comunidadhttp://repositorio.uta.edu.ec/handle/123456789/412

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2017 - 201912020 - 20221

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  • Miniatura
    Item type:Ítem,
    Producción de bioetanol utilizando biomasa de un cultivo mixto de microalgas como materia prima
    (Universidad Técnica de Ambato. Facultad de Ciencia e Ingeniería en Alimentos y Biotecnología. Carrera de Biotecnología, 2022-09)
    Carrera Ocampo, Miguel Ángel
    ;
    García Solís, Mario Daniel
    The biotechnological potential of microalgae in biofuels production continues to be a promising alternative to face the current energy crisis. This research project aimed to use the biomass of a mixed microalgae culture to produce bioethanol, for which the biomass production using industrial by-products as additional sources of carbon in the culture media was evaluated, and the optimal conditions for the acid hydrolysis of the carbohydrates contained in the microalgal biomass were determined. The mixotrophic cultures, composed of carbon dioxide and cheese whey or ethylene glycol as carbon sources, allowed the generation of higher biomass yields (1.38 and 0.60 milligrams per milliliter) in comparison with the autotrophic culture using carbon dioxide solely (0.50 milligrams per milliliter). Regarding the acid hydrolysis of carbohydrates, the higher release of reducing sugars per dry biomass (0.27 milligrams per milligram) was obtained using 2.0 percent volume-volume sulfuric acid. Additionally, it was determined that it is possible to obtain a higher amount of reducing sugars from the biomass obtained in the culture medium supplemented with ethylene glycol (0.30 milligrams per milligram). Finally, ethanol was produced by Saccharomyces cerevisiae at a concentration per dry biomass of 0.35 milligrams per milligram with a process yield of 82 percent from the fermentation of the sugars present in the biomass hydrolysate obtained from the culture with ethylene glycol. The results support the use of the biomass of the microalgae consortium as an efficient alternative to produce third-generation bioethanol.
  • Miniatura
    Item type:Ítem,
    Determinación de tipos de biomasa con potencial energético para la producción de biogás de los residuos sólidos urbanos (RSU) en la ciudad de Salcedo
    (Universidad Técnica de Ambato. Facultad de Ciencia e Ingeniería en Alimentos. Carrera de Ingeniería Bioquímica, 2017-05)
    Garcés Sánchez, Sonia Estefanía
    ;
    Córdova Suárez, Manolo Alexander
    In the preliminary part of the project Estimation of the energetic potential by thermal-physical analysis of urban solid waste (USW) of the city of Salcedo and anaerobic digestion with infrared radiation. A multiple kind of biomass with energetic potential for biogas production from solid urban waste was determined by classifying the USW in this city, the quantification of the percentage contribution of each kind of waste, and the application of the mathematics models for the determination of the generation of flow of biogas. The classification included 9 types of waste, which only 4 were considered as biomass (easy and fast anaerobic degradation), the contribution of the biomass was 63% of the total of the sampled waste (720 kg) during 36 days. The application of the mathematics models was carried out with the projection of weights of the waste from 2015 to 2030. The Ecuadorian model had the best annual average of biogas production flow (〖9,62x10〗^4 m^3) and consequently an energetic value per year of 〖4,86x10〗^5 kWh.