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fermentation process » termination process (Expander búsqueda), formulation process (Expander búsqueda), implementation process (Expander búsqueda)
level fermentation » pre fermentation (Expander búsqueda), between fermentation (Expander búsqueda)
fermentation process » termination process (Expander búsqueda), formulation process (Expander búsqueda), implementation process (Expander búsqueda)
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1
tesis de maestría
The thesis has two purposes: The first one is to build a mathematical model that better approximates (with respect to the mathematical model in [2]) to the behaviour of the wine fermentation process with the addition of certain amount of nitrogen at some instant of time, based in [2]. This mathematical model is described by mean ordinary differential equations including some parameters which will be identified solving some optimization problems. The second purpose of the thesis is to study the improved model but introducing some control variables in order to stabilize in an appropriated sense the corresponding dynamical system of the new model. This is a kind of MIMO nonlinear system control problems and will be solved using the tools in [6].
2
artículo
Publicado 2019
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The chemical composition and apparent digestibility of nutrients of the solid-state fermentation (SSF) of waste taro tubers (Colocasia esculenta (L) Schott) inoculated with natural yogurt fed to growing pigs was determined. Dry matter (DM), organic matter (OM), crude protein (CP), crude fibre (CF), ash, ether extract (EE), nitrogen-free extracts (NFE) and gross energy (GE) were determined. For the study of apparent digestibility of the MS, MO, CP, CF, NFE and GE, 12 castrated Landrace x Duroc x Pietrain male pigs of 25 ± 2 kg were used, distributed in three groups with four animals each and fed with diets containing 0, 10, and 20% of SSF (T0, T10 and T20, respectively). The SSF presented high content of DM (83.33%), OM (93.77%), CP (13.95%), NFE (72.78%) and GE (4162.13 kcal kg MS-1) and low levels of EE (1.50%), CF (5.54%) and ashes (6.23%). The highest digestibility coefficients of th...
3
artículo
Publicado 2019
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The chemical composition and apparent digestibility of nutrients of the solid-state fermentation (SSF) of waste taro tubers (Colocasia esculenta (L) Schott) inoculated with natural yogurt fed to growing pigs was determined. Dry matter (DM), organic matter (OM), crude protein (CP), crude fibre (CF), ash, ether extract (EE), nitrogen-free extracts (NFE) and gross energy (GE) were determined. For the study of apparent digestibility of the MS, MO, CP, CF, NFE and GE, 12 castrated Landrace x Duroc x Pietrain male pigs of 25 ± 2 kg were used, distributed in three groups with four animals each and fed with diets containing 0, 10, and 20% of SSF (T0, T10 and T20, respectively). The SSF presented high content of DM (83.33%), OM (93.77%), CP (13.95%), NFE (72.78%) and GE (4162.13 kcal kg MS-1) and low levels of EE (1.50%), CF (5.54%) and ashes (6.23%). The highest digestibility coefficients of th...
4
tesis de grado
Publicado 2024
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This research presents a comprehensive approach to the design, control, and structure of an innovative fermentation machine for the production of Tocosh from potato fermentation. In order to achieve this objective, a thorough analysis of the various crucial parameters involved in the fermentation process has been carried out. The main objective of the design proposal is the real-time monitoring of essential factors such as pH and temperature in the process. To achieve this, a control system has been designed that will allow precise and constant monitoring of the temperature and pH parameters, and monitoring of the water level was also carried out to improve the quality of the product. Furthermore, the structural analysis of the fermentation chamber is addressed in detail, using Inventor software for the creation of three- dimensional models of each component and for the generation of the...
5
artículo
Publicado 2023
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The aim of this study was to evaluate the crude protein (CP) and true protein (TP) content of sugarcane after the solid-state fermentation process (SSF) with and without addition of urea or an inoculum of Pediococcus acidilactici, Lindner. Nine aerobic silos were used where three treatments were evaluated: ground whole cane (GWC), GWC plus 2% urea (GWCu) and GWC inoculated with 108 CFU of P. acidilactici (GWClab). pH, CP and TP levels were measured, as well as changes in the microbial populations. The pH was higher than 6.1, except for GWCu where it was lower (5.6; p<0.05). The amounts of CP and TP were low, without differences between treatments until the end of the incubation period (72 h). Low amounts of lactic acid bacteria (lab) were observed in GWCu, with no significant differences in GWC and GWClab (p>0.05). In the periods of 48 and 72 h, the number of cellulolytic and total...
6
tesis de grado
Publicado 2024
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Abstract—This study focused on the development of a coffee fermenting machine designed to enhance the organoleptic characteristics of the Catimor variety in the province of Chanchamayo, with the aim of increasing the value of Peruvian coffee in the international market. The implementation of this machine not only benefits local coffee farmers by improving their income, but also contributes to the consolidation of Peruvian coffee as one of the best in the world. The methodology adopted for the design process follows the guidelines of the German VDI 2221 standard, which allowed for an effective understanding of the steps required to complete the proposed design. Furthermore, the designed machine manages to reduce the fermentation time from approximately 24 to 12 hours, while improving the sensory properties of the coffee when tasted. The design approach was based on a thorough analysis o...
7
artículo
Publicado 2019
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ABSTRACT Fumaric acid is an additive allowed by the Codex Alimentarius and under evaluation by the International Organisation of Vine and Wine (OIV) that can be used for wine acidification but also to inhibit malolactic fermentation (MLF). The use of 300–900 mg/L of fumaric acid can inhibit MLF in red wines decreasing pH by 0.2 units or more depending on the buffer capacity. When MLF was running with populations of either 7 or 8 log CFU/mL strain alpha (Oenococcus oeni) the application of 600 mg/L of fumaric acid stopped the process for more than 50 days and cells were undetected in specific media. In triangular tastings, fumaric acid was not detected at 300–600 mg/L (p < .05). In subsequent preference tests, some tasters perceived more acidity and body. Fumaric acid is a useful technological additive to improve wine microbiological stability and freshness, also allowing reduction of...
8
tesis de grado
Publicado 2025
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La chicha de guiñapo (ChG) es una bebida ancestral de la cultura y gastronomía de Arequipa, Perú. Esta bebida tradicional se elabora a partir de maíz morado (Zea mays L.), cultivado en diversas regiones del Perú. El maíz morado es reconocido por su contenido nutricional y su alto valor en compuestos bioactivos, como antioxidantes (20.5 ± 2.0 μmol TE/g), compuestos fenólicos totales (2.5 ± 0.3 mg GAE/g) y antocianinas (1.8 ± 0.2 mg/g). Esta investigación tuvo como objetivo explorar el desarrollo tecnológico de un producto instantáneo en polvo derivado de la chicha de guiñapo (ChG) utilizando tecnología de secado por aspersión. El maíz morado utilizado en este estudio fue procesado hirviendo el guiñapo a 100 °C durante una hora, seguido de enfriamiento y fermentación bajo condiciones controladas durante 5 a 7 días hasta alcanzar las características deseadas, referenc...
9
artículo
Publicado 2020
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Potato tocosh is a naturally processed potato for nutritional and curative purposes from traditional Peruvian medicine. The aim of this study was to investigate the acute and sub-acute toxicity of tocosh flour (TF). For sub-acute toxicity, TF was administered orally to rats daily once a day for 28 days at doses of 1000 mg/kg body weight (BW). Animals were observed for general behaviors, mortality, body weight variations, and histological analysis. At the end of treatment, relative organ weights, histopathology, hematological and biochemical parameters were analyzed. For acute toxicity, TF was administered orally to mice at doses of 2000 and 5000 mg/kg BW at a single dose in both sexes. Body weight, mortality, and clinical signs were observed for 14 days after treatment. The results of acute toxicity showed that the median lethal dose (LD50) value of TF is higher than 2000 g/kg BW but les...
10
artículo
Publicado 2025
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In recent years, cacao and its derivatives have gained significant attention due to their potential health benefits. The primary bioactive compounds in cacao are polyphenols and methylxanthines, predominantly represented by theobromine. Their concentrations vary widely, influenced by cacao variety, growth region, and postharvest processing. Fermentation typically leads to a marked decrease in polyphenols and theobromine, with further reductions during drying and roasting. This review aims to consolidate current knowledge on how these factors affect compound levels, providing insights crucial for optimizing practices to enhance the health benefits and quality of cacao products. Literature consistently shows that cacao properties are shaped by genetics, environmental conditions, and processing stages. Moreover, the unique polyphenol and theobromine profiles can serve as distinctive fingerp...
11
tesis de grado
Publicado 2025
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Objetivo: obtener etanol a partir de los residuos fermentados de la caña de azúcar, específicamente de la empresa agroindustrial del distrito de Magdalena departamento de Cajamarca desde julio hasta agosto 2021. Materiales y métodos: tiene un enfoque cuantitativo con un diseño cuasi experimental, prospectivo y un tipo de método analítico, longitudinal; teniendo como muestra 36 litros de residuo fermentados el cual sirvió para obtener parámetros que nos ayudaron a llegar a una conclusión e introducir determinadas variables de estudio. Resultado: el estudio identificó el grado alcohólico y rendimientos donde se pudo apreciar que, según se incrementa la concentración de levadura, aumenta el grado alcohólico del destilado obtenido. Se observa además que, si bien con 8 g de levadura se obtiene un mayor grado alcohólico, el volumen de destilado obtenido es menor, por lo cual, ...
12
tesis de grado
Publicado 2025
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En Perú, uno de los mayores problemas es la gestión del agua: más del 50% de la población costera depende solo del 2% del abastecimiento disponible. Esta escasez provoca la pérdida de miles de hectáreas agrícolas por falta de riego. Paralelamente, el 45% del lactosuero total producido, subproducto de la industria quesera, se desecha, ocasionando contaminación de suelos y ríos. Como alternativa, se propone aplicar hidrogeles biodegradables en suelos agrícolas para disminuir el estrés hídrico durante periodos de sequía. La tesis plantea el diseño de un proceso para producir hidrogeles de almidón reticulados con ácido cítrico obtenido por fermentación sumergida por lotes de lactosuero con Aspergillus niger. El ácido cítrico se recupera mediante precipitación química con hidróxido de calcio y ácido sulfúrico, seguido de la síntesis del hidrogel de almidón. Se defin...
13
artículo
Non-Saccharomyces yeasts are becoming important because most of them are considered as spoilage species in winemaking processes, among them the species Saccharomycodes ludwigii. This species is frequently isolated at the end of the fermentation process and/or during storage of the wine, i.e., it can to grow in the presence of high levels of ethanol. Besides, this species is adaptable to unfavorable conditions such as high concentrations of SO2 and is characterized by its capacity to produce high amounts of undesirable metabolites as acetoin, ethyl acetate or acetic acid. To the present, physical (gamma irradiation and continuous pulsed electric fields), chemical (inhibitory compounds such as chitosan and dimethyl dicarbonate) and biological (antagonistic biocontrol by killer yeasts) treatments have been developed in order to control the growth of this spoilage yeast in wines and other fr...
14
artículo
Publicado 2018
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This study is part of research developed in the area of Food Science, Department of Analytical Chemistry and Food, University of Vigo Ourense Campus, Spain.; whose ultimate goal is to occurring fermented beverages with probiotic properties with kefir grains juice of red and white grapes would thus not valuing vinificables grapes with low commercial value or direct consumption. And obtaining healthy drinks combining ink effects mainly polyphenol grape character with antioxidant kefir and functional benefits. Kinetics main fermentation process cash studied, the effect of change on the fermentation substrate and microbial populations analyzed kefir. The procedure was carried out as follows: the pellet was activated, conducted a sequence of four successive crops. In each one the juice grain was incubated of nonsterile red grape during 24 h. The grain separated and juice fermented by fr...
15
tesis de grado
Publicado 2025
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Desde la invención de las máquinas despulpadoras de café, estas se han convertido en una herramienta esencial en las industrias cafetaleras por sus beneficios, como el aumento de la producción y la reducción de la carga laboral. Sin embargo, la calidad del despulpado no ha sido suficientemente mejorada con el tiempo. La máquina implementada en este proyecto aborda cuatro etapas cruciales del procesamiento del café: control de flujo de ingreso, tamizado pre-despulpado, despulpado y almacenamiento y fermentación. El proyecto se divide en estas etapas, detalladas en el documento. Además, se utiliza un sistema de control con un tablero, un PLC Coolmay y una pantalla HMI para optimizar el manejo y la visualización del proceso. Tras las pruebas, la máquina demostró una producción de 128 kg/h con una eficiencia del 92% en granos correctamente despulpados frente a los dañados. La o...
16
artículo
Publicado 2020
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Reviews on biotechnological chitin recovery from crustacean waste and other sources acknowledge. Most of the reviews conclude that although important results on chitin recovery have been achieved, there is still a need for better approaches to improve operational conditions of deproteinization and demineralization processes, such as time, carbon source, pH (initial and during fermentation), volume of inoculum, temperature, among others, in order to apply at industrial level, a bioprocess commercially and environmentally cost/effective viable. The present review aims to gather the most updated available information about research on biotechnological methods to recover chitin from crustacean waste, studied during the past 10 years, focussing on conditions applied to deproteinization (DP) and demineralization (DM), particularly on bioprocessing times and microbial species.
17
artículo
Reviews on biotechnological chitin recovery from crustacean waste and other sources acknowledge. Most of the reviews conclude that although important results on chitin recovery have been achieved, there is still a need for better approaches to improve operational conditions of deproteinization and demineralization processes, such as time, carbon source, pH (initial and during fermentation), volume of inoculum, temperature, among others, in order to apply at industrial level, a bioprocess commercially and environmentally cost/effective viable. The present review aims to gather the most updated available information about research on biotechnological methods to recover chitin from crustacean waste, studied during the past 10 years, focussing on conditions applied to deproteinization (DP) and demineralization (DM), particularly on bioprocessing times and microbial species.
18
artículo
Publicado 2012
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This paper describes the influence of process variables to produce orange vinegar. Orange juice was fermented with Saccharomyces cerevisiae until reach 14% v/v. The biooxidation was carried out with Acetobacter sp., in submerge culture using a laboratory scale fermentor. In order to avoid the inhibitory effect of ethanol on acetic acid bacteria, the orange wine was diluted to 6% v/v with a mineral solution. It was performed a factorial design 2k to study the influence of variables. It was studied air flow rate/agitation at levels of 0.3-0.6 vvm and 200-400 rpm and the effect of air flow rate/temperature at 0.4-0.6 vvm and 25-30°C, respectively. Duplicate treatments were carried out and the results were evaluated in terms of productivity and fermentation yield. Statistical design (p-value<0.05) was analyzed using Statgraphics Centurion XV Corporate software. Treatments performed at 20...
19
artículo
Publicado 2012
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This paper describes the influence of process variables to produce orange vinegar. Orange juice was fermented with Saccharomyces cerevisiae until reach 14% v/v. The biooxidation was carried out with Acetobacter sp., in submerge culture using a laboratory scale fermentor. In order to avoid the inhibitory effect of ethanol on acetic acid bacteria, the orange wine was diluted to 6% v/v with a mineral solution. It was performed a factorial design 2k to study the influence of variables. It was studied air flow rate/agitation at levels of 0.3-0.6 vvm and 200-400 rpm and the effect of air flow rate/temperature at 0.4-0.6 vvm and 25-30°C, respectively. Duplicate treatments were carried out and the results were evaluated in terms of productivity and fermentation yield. Statistical design (p-value<0.05) was analyzed using Statgraphics Centurion XV Corporate software. Treatments performed at 20...
20
tesis de grado
Publicado 2024
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Las enzimas xilanolíticas son biocatalizadores industriales con una demanda creciente en la industria del etanol de segunda generación. Por este motivo, en años recientes se han desarrollado importantes avances a escala de laboratorio para lograr una producción más barata y eficiente de estas enzimas; sin embargo, poco se ha investigado acerca del desempeño económico de estos avances una vez llevado a cabo el escalamiento a nivel industrial. Para hacer frente a este problema, la siguiente tesis plantea el diseño de un proceso para la producción de un cocktail enzimático de alta actividad xilanolítica utilizando bagazo de caña de azúcar como fuente de carbono teniendo en cuenta la cinética de secreción enzimática del hongo Trichoderma harzianum P49P11 bajo una estrategia de fermentación sumergida por lotes alimentados, el escalamiento de las operaciones unitarias requerid...
