Bibliographic citations
Barra, J., (2019). Valorización de virutas de cuero mediante la recuperación de hidrolizado de colágeno y sales de cromo por hidrólisis [Tesis, Universidad Nacional de Ingeniería]. http://hdl.handle.net/20.500.14076/19961
Barra, J., Valorización de virutas de cuero mediante la recuperación de hidrolizado de colágeno y sales de cromo por hidrólisis [Tesis]. PE: Universidad Nacional de Ingeniería; 2019. http://hdl.handle.net/20.500.14076/19961
@misc{renati/265391,
title = "Valorización de virutas de cuero mediante la recuperación de hidrolizado de colágeno y sales de cromo por hidrólisis",
author = "Barra Hinojosa, Julio Alexis",
publisher = "Universidad Nacional de Ingeniería",
year = "2019"
}
The present research was developed with the purpose of valorize chrome leather shavings through the recovering of collagen hydrolysate and chromium salts by hydrolysis. In order to do that, 3 hydrolysis methods were evaluated to identify which of them presents the best results in protein and chromium recovery. Following, the identified method was optimized through an experimental design to carry the process at pilot scale. Initially, the amount of protein and chromium of a chromium leather shavings sample obtained from a tannery factory was determined. After that, the hydrolysis of the sample was realized, through 3 methods at laboratory scale: alkaline hydrolysis, enzymatic hydrolysis and alkaline-enzymatic hydrolysis, where alkaline hydrolysis was determined as the one which presented better results in protein and chromium recovery. The optimization of this method was developed through a factorial design with 2 response variables: recovered collagen protein percent and residual chromium percent in the collagen hydrolysate. As result, the optimum alkaline hydrolysis conditions were obtained: 70ºC, 0.47 M NaOH and 90 minutes for the reaction, as well as the relation between the response variables. Finally, the process was carried out in pilot scale, where 45 L of collagen hydrolysate were recovered, with 87.16% of recovered collagen protein and 1.17% of residual chromium. In addition, 750.80 g of chrome cake were obtained, which is substantially composed by chromium hydroxide. This thesis was developed with the collaboration of the “Unidad de I+D” from CITEccal Lima, according to their research lines.
This item is licensed under a Creative Commons License