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Type: Artigo
Title: Sugarcane bagasse hydrolysates as feedstock to produce the isopropanol-butanol-ethanol fuel mixture: Effect of lactic acid derived from microbial contamination on Clostridium beijerinckii DSM 6423
Author: Vieira, Carla Ferreira dos Santos
Codogno, Mateus Cavichioli
Maugeri Filho, Francisco
Maciel Filho, Rubens
Mariano, Adriano Pinto
Abstract: Enzymatic hydrolysis of lignocellulose under industrial conditions is prone to contamination by lactic acid bacteria, and in this study, a cellulose hydrolysate produced from dilute-acid pretreated sugarcane bagasse contained 13 g/L lactic acid and was used for IBE production by Clostridium beijerinckii DSM 6423. In fermentation of the cellulose hydrolysate supplemented with sugarcane molasses for nutrients and buffering of the medium (40 g/L total sugar), 92% of the lactic acid was consumed, and the butanol yield was as high as 0.28 (7.9 g/L butanol), suggesting that lactic acid was preferentially metabolized to butanol. When the hydrolysate was mixed with a detoxified bagasse hemicellulose hydrolysate and supplemented with molasses (35 g/L total sugar), the culture was able to exhaust glucose and utilized sucrose (by 38%), xylose (31%), and lactic acid (70%). Overall, this study shows that C. beijerinckii DSM 6423 can co-ferment first- and second-generation sugars while consuming lactic acid
Subject: Ácido lático
Country: Países Baixos
Editor: Elsevier
Rights: Fechado
Identifier DOI: 10.1016/j.biortech.2020.124140
Date Issue: 2021
Appears in Collections:FEA - Artigos e Outros Documentos
FEQ - Artigos e Outros Documentos

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