Detoxification of sugarcane-derived hemicellulosic hydrolysate using a lactic acid producing strain

• Published in: Journal of biotechnology 2018-07, Vol.278, p.56-63
• Main Authors: Alves de Oliveira, Regiane, Vaz Rossell, Carlos Eduardo, Venus, Joachim, Cândida Rabelo, Sarita, Maciel Filho, Rubens
• Format: Article
• Language: English
• Subjects: Bio-detoxification; Furfural; Hemicellulosic liquor; HMF; Lactic acid
• ISSN: 0168-1656; 1873-4863
• DOI: 10.1016/j.jbiotec.2018.05.006

•L. plantarum detoxifies hemicellulosic liquor during fermentation process.•Furfural from sugarcane bagasse hydrolysate is decreased for more than 98% during lactic acid fermentation.•HMF from sugarcane bagasse hydrolysate is decreased for more than 86% during lactic acid production. Furfural and HMF are known for a negative impact in different bioprocesses, including lactic acid fermentation. There are already some methods described to remove these inhibitory compounds from the hydrolysates. However, these methods also reduce the yield of sugars from the hydrolysis and increase the process costs. In this work, the detoxification of sugarcane-derived hemicellulosic hydrolysate was performed by Lactobacillus plantarum during the fermentation time. At the end of the fermentation, a decrease of 98% of furfural and 86% of HMF and was observed, with a final lactic acid titer of 34.5 g/L. The simultaneous fermentation and bio-detoxification simplify the process and reduce operational costs, leading to economic competitiveness of second-generation feedstock for lactic acid production.