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Extracción de gelatina mediante ácido acético utilizando como materia prima desechos de curtiembres
(Universidad Técnica de Ambato. Facultad de Ciencia e Ingeniería en Alimentos y Biotecnología. Carrera de Ingeniería en Alimentos, 2021-01)
Casa Quinapallo, Liliana Mishell
;
Cabrera Valle, Daniel Alfonso
The research work is presented as an alternative to extract gelatin using as a base waste from tanneries, companies dedicated to the transformation of leather to leather. The waste generated (glues, scraps, and meat) in these industries represents large quantities, reaching values of glues 28,800 units to the month, meat 150 720 kg to the month and scrap 8,321 kg to the month. Currently, these wastes are taken to the sanitary landfill through an environmental manager. Useful experimental techniques were used to obtain a higher yield and a lower environmental impact. The protein analysis was carried out for each sample, obtaining 30.4 percent; the percentage in tails, the 22.6 percent; the percentage in remnant and bait with 9.42 percent the percentage; high values due to the composition of the waste itself. The behavior of these by-products was observed with different concentrations of acetic acid (0.5-1 mole per liter), for a period of 24 hours. 18 treatments are presented, the most optimal for tails T16 (1 mole per liter acid concentration), T12 remnant (0.8 mole per liter acid concentration) and T8 bait (0.7 mole per liter acid concentration), at these concentrations the pH values after the second neutralization are in the range of the control taken, a higher acid concentration is required for the tails due to the presence of different types of collagens in the sample.
Determinación del pH óptimo de acción del peróxido de hidrógeno en el blanqueamiento de la carnaza para la producción de gelatina pura elaborada en la empresa PRODEGEL S. A.
(Universidad Técnica de Ambato. Facultad de Ciencia e Ingeniería en Alimentos. Carrera de Ingeniería en Alimentos., 2019-01)
Proaño López, José Andrés
;
Cerda Mejía, Liliana Alexandra
In the pure gelatin industry, the bleaching process of the carnaza is vital for the quality of the finished product. Hydrogen peroxide is used as a bleaching agent for animal skins. This is ionized in the alkaline medium forming the perhydroxyl ion which is responsible for destroying the chromophoric (melanin) groups of the skin, producing the bleanching until its decomposition in gaseous oxygen and water. The objective of the present study was to obtain the optimal conditions of action of hydrogen peroxide in the whitewash of the carnaza (pelambre and descarne) by means of the response surface methodology (RSM), given in the washers-acidulators implemented in the production plant of pure gelatine PRODEGEL S.A. We used 11 treatments defined by the central composite design, taken as factors of analysis the pH of the solution and the time of the stir in the washer-acidulators; the response variable was the brightness (L*) of the carnaza measured with the Lovibond colorimeter model RM-200 and compared with the L * of the material bleached with the previous process (liming pools). The resulting equation determined by the RSM established that the optimum conditions for the bleaching of descarne material were pH 7 with 2.4 hours of stir obtained a value of L* equal to 91.73 compared to the process in pools that used a pH of 12-12.4 for four days, giving a luminosity of 70.41. On the other hand, for the pelambre material, the optimum conditions were pH 7.5 with 1 hour of stir, obtaining a value of L* equal to 85.16; comparing with the hair treated in pools of L* equal to 79.16 which was bleached in 6 days at a pH of 12-12.6; obtaining thus an optimization in the time of bleached of the carnaza.
Efecto del tipo de carnaza sobre las propiedades reológicas del licor de gelatina pura de origen bovino
(Universidad Técnica de Ambato. Facultad de Ciencia e Ingeniería en Alimentos. Carrera de Ingeniería en Alimentos, 2013)
Gutiérrez Lara, José Luis
;
Alvarado, Juan de Dios

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