| Titre : |
Investigation of different pre-treatments of chromium leather shavings to improve biogas production |
| Type de document : |
texte imprimé |
| Année de publication : |
2020 |
| Article en page(s) : |
14 p. |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Biogaz
Chimie analytique
Cuirs et peaux -- Déchets -- Recyclage
Digestion anaérobie
Extrusion (mécanique)
Traitement hydrothermique
|
| Index. décimale : |
675 Technologie du cuir et de la fourrure |
| Résumé : |
Chromium shavings are wet by-products of the leather industry, of which thousands of tons accrue worldwide during leather manufacture. Due to their chromium content, chromium shavings are responsible for the most important ecological challenges caused by the leather industry. They are stable towards temperatures of up to 110 °C and enzymatic degradation. This high stability is caused by the three-dimensional native structure, typical for collagen, and additional chemical cross-links between the collagen fibres achieved by Cr3+ salts in the tanning process. Therefore, hitherto chromium shavings are not utilized industrially to produce biogas. In order to generate biogas, this stable structure has to be denatured. Chromium shavings were pre-treated by extrusion and hydrothermal methods. To prove the enzymatic degradability, the different pre-treatments were evaluated by differential scanning calorimetry (DSC), enzymatic assays, and by measuring the solubility in water. The biogas production potential was investigated using batch trials to examine feasibility. Results demonstrated that both pre-treatments allowed enzymatic attack and increased degradability of the chromium shavings reducing the lag-phase of biogas production and the remaining waste. |
| Note de contenu : |
- INTRODUCTION : Anaerobic digestion of chromium leather waste - Collagen structure and stability - Destabilization of chromium leather waste
- MATERIAL AND METHODS : Material - Pre-treated samples - Extrusion - Hydrothermal treatment - Scanning electron microscope (SEM) - Differential scanning calorimetry (DSC) - Enzyme assays - Solubility in water - Biogas production
- RESULTS AND DISCUSSION : Assessment of the pre-treated samples - Biogas production
- Table 1 : Pre-treatment conditions and sample nomenclature |
| DOI : |
https://doi.org/10.1186/s42825-020-00028-x |
| En ligne : |
https://link.springer.com/content/pdf/10.1186/s42825-020-00028-x.pdf |
| Format de la ressource électronique : |
Pdf |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=37338 |
in JOURNAL OF LEATHER SCIENCE AND ENGINEERING > Vol. 2 (Année 2020) . - 14 p.
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Investigation of different pre-treatments of chromium leather shavings to improve biogas production in JOURNAL OF LEATHER SCIENCE AND ENGINEERING, Vol. 2 (Année 2020)
