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Evaluating the effect of enzymatic pretreatment on the anaerobic digestibility of pulp and paper biosludge
Anaerobic digestion of biosludge has not yet been implemented in pulp mills due to low biogas yields. Enzymatic pretreatment of biosludge has shown improvements in biogas yields but results are varied. A key limitation of previous studies is that they fail to consider the COD contribution from the e...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5767569/ https://www.ncbi.nlm.nih.gov/pubmed/29349044 http://dx.doi.org/10.1016/j.btre.2017.12.009 |
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author | Bonilla, Sofia Choolaei, Zahra Meyer, Torsten Edwards, Elizabeth A. Yakunin, Alexander F. Allen, D. Grant |
author_facet | Bonilla, Sofia Choolaei, Zahra Meyer, Torsten Edwards, Elizabeth A. Yakunin, Alexander F. Allen, D. Grant |
author_sort | Bonilla, Sofia |
collection | PubMed |
description | Anaerobic digestion of biosludge has not yet been implemented in pulp mills due to low biogas yields. Enzymatic pretreatment of biosludge has shown improvements in biogas yields but results are varied. A key limitation of previous studies is that they fail to consider the COD contribution from the enzyme solutions. The aim of this study was to systematically investigate the potential for enzymatic pretreatment on the anaerobic digestibility of pulp mill biosludge. Out of the six enzymes tested, four enhanced the anaerobic digestibility of biosludge. At the end of the BMP, a maximum improvement of 26% in biogas yield was observed with protease from B. licheniformis. There was no correlation between enzymatic activities on standard substrates and/or on biosludge and the effect of enzymes on biogas yields. Enzymes have potential for improving biosludge anaerobic digestibility but more research on optimal conditions and potential synergies with other pretreatment is needed. |
format | Online Article Text |
id | pubmed-5767569 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-57675692018-01-18 Evaluating the effect of enzymatic pretreatment on the anaerobic digestibility of pulp and paper biosludge Bonilla, Sofia Choolaei, Zahra Meyer, Torsten Edwards, Elizabeth A. Yakunin, Alexander F. Allen, D. Grant Biotechnol Rep (Amst) Article Anaerobic digestion of biosludge has not yet been implemented in pulp mills due to low biogas yields. Enzymatic pretreatment of biosludge has shown improvements in biogas yields but results are varied. A key limitation of previous studies is that they fail to consider the COD contribution from the enzyme solutions. The aim of this study was to systematically investigate the potential for enzymatic pretreatment on the anaerobic digestibility of pulp mill biosludge. Out of the six enzymes tested, four enhanced the anaerobic digestibility of biosludge. At the end of the BMP, a maximum improvement of 26% in biogas yield was observed with protease from B. licheniformis. There was no correlation between enzymatic activities on standard substrates and/or on biosludge and the effect of enzymes on biogas yields. Enzymes have potential for improving biosludge anaerobic digestibility but more research on optimal conditions and potential synergies with other pretreatment is needed. Elsevier 2018-01-05 /pmc/articles/PMC5767569/ /pubmed/29349044 http://dx.doi.org/10.1016/j.btre.2017.12.009 Text en © 2018 The Authors http://creativecommons.org/licenses/by/4.0/ This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Bonilla, Sofia Choolaei, Zahra Meyer, Torsten Edwards, Elizabeth A. Yakunin, Alexander F. Allen, D. Grant Evaluating the effect of enzymatic pretreatment on the anaerobic digestibility of pulp and paper biosludge |
title | Evaluating the effect of enzymatic pretreatment on the anaerobic digestibility of pulp and paper biosludge |
title_full | Evaluating the effect of enzymatic pretreatment on the anaerobic digestibility of pulp and paper biosludge |
title_fullStr | Evaluating the effect of enzymatic pretreatment on the anaerobic digestibility of pulp and paper biosludge |
title_full_unstemmed | Evaluating the effect of enzymatic pretreatment on the anaerobic digestibility of pulp and paper biosludge |
title_short | Evaluating the effect of enzymatic pretreatment on the anaerobic digestibility of pulp and paper biosludge |
title_sort | evaluating the effect of enzymatic pretreatment on the anaerobic digestibility of pulp and paper biosludge |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5767569/ https://www.ncbi.nlm.nih.gov/pubmed/29349044 http://dx.doi.org/10.1016/j.btre.2017.12.009 |
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