Resumo

VALLEJO-RODRIGUEZ, Juan Sebastián et al. Evaluation of alkaline-enzymatic hydrolysis to obtain hydrolyzed collagen from tanned leather shavings. Rev. ion [online]. 2019, vol.32, n.1, pp.55-62.  Epub 03-Jun-2019. ISSN 0120-100X.  https://doi.org/10.18273/revion.v32n1-2019005.

The tanned leather shavings represent the solid waste generated during the leather cutting stage as part of the tanning and dyeing of skins; this waste represents a risk to the environment at the time of its final disposal, because of the high chromium content, situation that makes it necessary to evaluate alternatives for its treatment. In the experimental process, the enzymatic hydrolysis of the chip was used to obtain hydrolyzed collagen; the variables or process factors used were the pH (8 and 10), reaction times (11 to 13 hours) and dose of BLUE G enzyme-Dupont international (0.00001 kg, 0.0000125 kg y 0.000015 kg). The experimental results gave rise to determine that the optimal conditions for obtaining hydrolyzed collagen in its highest content were pH 10, enzyme dose of 0.000015 kg and 12.5 hours of reaction time to obtain a hydrolyzed collagen concentration of 1.828 kg/m3 corresponding to a recovery of 9.14 % by mass with respect to the mass of tanned leather chip used for each test.

Palavras-chave : Collagen; Enzymatic Hydrolysis; Leather Shavings.

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