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The effect of various pre‐treatment methods of chromium leather shavings in continuous biogas production

During leather manufacture, high amounts of chromium shavings, wet by‐products of the leather industry, are produced worldwide. They are stable towards temperatures of up to 110°C and enzymatic degradation, preventing anaerobic digestion in a biogas plant. Hitherto, chromium shavings are not utilize...

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Autores principales: Gomes, Carolina Scaraffuni, Repke, Jens‐Uwe, Meyer, Michael
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7447882/
https://www.ncbi.nlm.nih.gov/pubmed/32874172
http://dx.doi.org/10.1002/elsc.201900127
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author Gomes, Carolina Scaraffuni
Repke, Jens‐Uwe
Meyer, Michael
author_facet Gomes, Carolina Scaraffuni
Repke, Jens‐Uwe
Meyer, Michael
author_sort Gomes, Carolina Scaraffuni
collection PubMed
description During leather manufacture, high amounts of chromium shavings, wet by‐products of the leather industry, are produced worldwide. They are stable towards temperatures of up to 110°C and enzymatic degradation, preventing anaerobic digestion in a biogas plant. Hitherto, chromium shavings are not utilized industrially to produce biogas. In order to ease enzymatic degradation, necessary to produce biogas, a previous denaturation of the native structure has to be carried out. In our projects, chromium shavings were pre‐treated thermally and mechanically by extrusion and hydrothermal methods. In previous works, we intensively studied the use of these shavings to produce biogas in batch scale and significant improvement was reached when using pre‐treated shavings. In this work, a scale‐up of the process was performed in a continuous reactor using pre‐treated and untreated chromium shavings to examine the feasibility of the considered method. Measuring different parameters along the anaerobic digestion, namely organic matter, collagen content, and volatile fatty acids content, it was possible to show that a higher methane production can be reached and a higher loading rate can be used when feeding the reactor with pre‐treated shavings instead of untreated chromium shavings, which means a more economical and efficient process in an industrial scenario.
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spelling pubmed-74478822020-08-31 The effect of various pre‐treatment methods of chromium leather shavings in continuous biogas production Gomes, Carolina Scaraffuni Repke, Jens‐Uwe Meyer, Michael Eng Life Sci Research Articles During leather manufacture, high amounts of chromium shavings, wet by‐products of the leather industry, are produced worldwide. They are stable towards temperatures of up to 110°C and enzymatic degradation, preventing anaerobic digestion in a biogas plant. Hitherto, chromium shavings are not utilized industrially to produce biogas. In order to ease enzymatic degradation, necessary to produce biogas, a previous denaturation of the native structure has to be carried out. In our projects, chromium shavings were pre‐treated thermally and mechanically by extrusion and hydrothermal methods. In previous works, we intensively studied the use of these shavings to produce biogas in batch scale and significant improvement was reached when using pre‐treated shavings. In this work, a scale‐up of the process was performed in a continuous reactor using pre‐treated and untreated chromium shavings to examine the feasibility of the considered method. Measuring different parameters along the anaerobic digestion, namely organic matter, collagen content, and volatile fatty acids content, it was possible to show that a higher methane production can be reached and a higher loading rate can be used when feeding the reactor with pre‐treated shavings instead of untreated chromium shavings, which means a more economical and efficient process in an industrial scenario. John Wiley and Sons Inc. 2019-11-24 /pmc/articles/PMC7447882/ /pubmed/32874172 http://dx.doi.org/10.1002/elsc.201900127 Text en © 2019 The Authors. Engineering in Life Sciences published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Articles
Gomes, Carolina Scaraffuni
Repke, Jens‐Uwe
Meyer, Michael
The effect of various pre‐treatment methods of chromium leather shavings in continuous biogas production
title The effect of various pre‐treatment methods of chromium leather shavings in continuous biogas production
title_full The effect of various pre‐treatment methods of chromium leather shavings in continuous biogas production
title_fullStr The effect of various pre‐treatment methods of chromium leather shavings in continuous biogas production
title_full_unstemmed The effect of various pre‐treatment methods of chromium leather shavings in continuous biogas production
title_short The effect of various pre‐treatment methods of chromium leather shavings in continuous biogas production
title_sort effect of various pre‐treatment methods of chromium leather shavings in continuous biogas production
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7447882/
https://www.ncbi.nlm.nih.gov/pubmed/32874172
http://dx.doi.org/10.1002/elsc.201900127
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