Title
Optimization of alkaline hydrolysis of chrome shavings to recover collagen hydrolysate and chromium hydroxide
Other title
Optimisation de l’hydrolyse alcaline de copeaux de chrome pour recuperer l’hydrolysat de collagene et l’hydroxyde de chrome
Optimizarea procesului de hidroliză alcalină a răzăturii de piele cromată pentru a valorifica hidrolizatul de colagen şi hidroxidul de crom
Date Issued
01 March 2020
Access level
open access
Resource Type
journal article
Publisher(s)
INCDTP: Division Leather Footwear Research Institute
Abstract
The tanning industry uses skins and hides from cattle, sheep, among others, which are a byproduct of the meat industry. In their production process, they generate wastewater and solid wastes in significant quantities, that require alternatives for their adequate treatment. The present research was developed to optimize the alkaline hydrolysis process of chrome leather shavings to recover collagen hydrolysate and chromium salts, and to identify the relation between the response variables and hydrolysis conditions. For this purpose, a preliminary study was carried out, where alkaline hydrolysis conditions were adjusted, then these were optimized through a factorial design and scaled up the process to a pilot level. The preliminary study of alkaline hydrolysis of the sample was performed, where reaction time and sodium hydroxide concentration were established as factors to adjust the process. The optimization of this method was developed through a factorial design with two response variables: percentage of recovered collagen protein (PRCP) and percentage of residual chromium (PRC) present in the collagen hydrolysate. Thus, the optimum alkaline hydrolysis conditions were obtained: 70°C, 0.47 M NaOH and 90 minutes for the reaction, and the relation between the response variables. Finally, the process was carried out in a pilot scale in which 45 L of collagen hydrolysate was recovered, with 87.16% of recovered collagen protein and 1.17% of residual chromium.
Start page
15
End page
28
Volume
20
Issue
1
Language
English
OCDE Knowledge area
Química analítica
Subjects
Scopus EID
2-s2.0-85084489083
Source
Leather and Footwear Journal
ISSN of the container
15834433
Sponsor(s)
We acknowledge to the Productive Innovation and Technological Transfer Center of Leather, Footwear and related industries (CITEccal Lima) and all its staff for the support provided to carry out this project. Likewise, to the Direction of Research, Development, Innovation and Technological Transfer of the Technological Institute of Production (ITP) for the facilities to carry out the laboratory stage in its facilities and to the Faculty of Sciences of the National University of Engineering (UNI Perú) for the access to its laboratories, where the scaling up of the project was carried out.
Sources of information:
Directorio de Producción Científica
Scopus