Diauxie during biogas production from collagen-based substrates

Carolina Scaraffuni Gomes, Jens-Uwe Repke and Michael Meyer

Renewable Energy, 2019, vol. 141, issue C, 20-27

Abstract: The leather industry converts hides (by-product of the meat industry) into value-added products. However, processing of leather generates collagen-based solid wastes such as shavings and offcuts, which consist mostly of collagen and 3–5% chromium oxide. Chromium shavings and leather offcuts are stable towards temperatures of up to 100 °C and enzymatic degradation, thus making them hard to digest in a biogas plant. This stability is caused by the structure of collagen and chemical cross-links achieved by Cr3+ salts. These wastes are responsible for the main ecological problem caused by tanneries.

Keywords: Biogas production; Anaerobic digestion; Diauxie; Collagen-based substrates; Extrusion (search for similar items in EconPapers)
Date: 2019
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Citations: View citations in EconPapers (2)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:141:y:2019:i:c:p:20-27

DOI: 10.1016/j.renene.2019.03.123

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