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https://hdl.handle.net/1822/42052
Título: | Valorizing recycled paper sludge by a bioethanol production process with cellulase recycling |
Autor(es): | Gomes, Daniel Gonçalves Domingues, Lucília Gama, F. M. |
Palavras-chave: | Recycled paper sludge Cellulase recycling Ultrafiltration Alkaline wash Cellulosic bioethanol |
Data: | Set-2016 |
Editora: | Elsevier 1 |
Revista: | Bioresource Technology |
Citação: | Gomes, Daniel G.; Domingues, Lucília; Gama, F. M., Valorizing recycled paper sludge by a bioethanol production process with cellulase recycling. Bioresource Technology, 216, 637-644, 2016 |
Resumo(s): | The feasibility of cellulase recycling in the scope of bioethanol production from recycled paper sludge (RPS), an inexpensive byproduct with around 39% of carbohydrates, is analyzed. RPS was easily converted and fermented by enzymes and cells, respectively. Final enzyme partition between solid and liquid phases was investigated, the solid-bound enzymes being efficiently recovered by alkaline washing. RPS hydrolysis and fermentation was conducted over four rounds, recycling the cellulases present in both fractions. A great overall enzyme stability was observed: 71, 64 and 100% of the initial Cel7A, Cel7B and -glucosidase activities, respectively, were recovered. Even with only 30% of fresh enzymes added on the subsequent rounds, solid conversions of 92, 83 and 71% were achieved for the round 2, 3 and 4, respectively. This strategy enabled an enzyme saving around 53-60%, while can equally contribute to a 40% reduction in RPS disposal costs. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/42052 |
DOI: | 10.1016/j.biortech.2016.06.004 |
ISSN: | 0960-8524 |
e-ISSN: | 0960-8524 |
Versão da editora: | http://www.journals.elsevier.com/bioresource-technology/ |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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document_38990_1.pdf | 916,03 kB | Adobe PDF | Ver/Abrir |