Browsing by Autor "Gretel Villanueva-Ramos"

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    Análisis de los residuos en la producción de harina de Lombriz Roja californiana (eisenia foetida) en la planta piloto de la Universidad Técnica de Manabí. Ecuador
    (2016) Ulbio Eduardo Alcívar-Cedeño; Alex Alberto Dueñas Rivadeneira; Eli Sacon-Vera; Gretel Villanueva-Ramos; Luis Ramón Bravo Sánchez
    The necessity for have efficient tools in the environmental assessment of production processesis treated in this paper. This work is related to a previous work made in the Technical University of Manabi, forprotein supplements production from unconventional raw materials, specifically Earthworm (Eisenia foetida)flour, using various ecotoxicological methods to evaluategeneratedwaste in pilot production, in order to contribute to compliance the environmental regulations. Liquid wastes generated in the production of earthworm flour were determined and evaluated under the following biological indicators: inhibition of seed germination, root growth in Lactuca sativa, acute toxicity in Eisenia foetida to determine the environmental toxicity of the production process. As result, the major environmental contamination that occurs during the process of obtaining meal worm (Eisenia foetida) is given in the cleaning process, sacrifice, washing and milling. The waste characterization allowed determining that they are domestic water and process water. The use of ecotoxicological bioassays described, that the sacrificialwater inhibit germination and root elongation, and they are classified as slightly toxic thewash waters cause sublethal effects.
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    Escalado y dimensionamiento de una planta pilotopara la producción de un extracto acuoso de Chuquiraga jussieui J.F Gmel
    (2016) Alex Alberto Dueñas Rivadeneira; Ulbio Eduardo Alcívar-Cedeño; Ely Sacón-Vera; Neibis Casdelo; Gretel Villanueva-Ramos
    The objective of this work is to design a pilot plant for the production of an aqueous extract of Chuquiraga jussieui JF Gmelnative speciesof Ecuador that will be used as the main raw material to produce functional beverages with antioxidant activity. The average consumption and the potential of functional beverages in ManabiEcuador are set by a market study.After process steps were defined at laboratory level, the stability of  the aqueous extract at three temperatures and three times is analyzed by accelerated stability method, the flowchart and technological scheme for processing is constructed and then the scaling and selection of pilot scale equipment is performed. The results show that a potential market for functional drinks consumption for processing 1400 liters daily exists, the process steps are set at the laboratory and is defined that the aqueous extract has a stability of 30 days at 4 Celsiusdegrees, because the main operation in process is the solid-liquid extraction and the main equipment used for this is a mixing tank, it was scale up usinggeometric similarity and mixing power per volumeconstant criteria.