D‐Lactic acid production from waste cardboard |
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Authors: | Remedios Yez Jos Luis Alonso Juan Carlos Paraj |
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Affiliation: | Remedios Yáñez,José Luis Alonso,Juan Carlos Parajó |
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Abstract: | The effects caused by alkaline treatment on the susceptibility of waste cardboard to enzymatic hydrolysis have been studied. Optimised conditions leading to extensive saccharification of both cellulose (870 g kg?1 conversion) and hemicelluloses (845 g kg?1 conversion) were identified. Samples treated under selected operational conditions were employed for producing D ‐lactic acid by simultaneous saccharification and fermentation (SSF) in media containing cellulases, β‐glucosidase and Lactobacillus coryniformis ssp torquens cells. SSF fed‐batch experiments led to D ‐lactic acid concentrations up to 23.4 g dm?3 at a product yield of 514 g lactic acid kg?1 of potential glucose and a volumetric productivity of 0.48 g dm?3 h?1. Copyright © 2004 Society of Chemical Industry |
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Keywords: | corrugated cardboard enzymatic hydrolysis D(− )‐lactic acid Lactobacillus coryniformis ssp torquens simultaneous saccharification and fermentation swelling |
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