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D-Lactic acid production from waste cardboard

✍ Scribed by Remedios Yáñez; José Luis Alonso; Juan Carlos Parajó

Publisher
Wiley (John Wiley & Sons)
Year
2004
Tongue
English
Weight
227 KB
Volume
80
Category
Article
ISSN
0268-2575

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✦ Synopsis

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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