Growth kinetics of Lactobacillus acidophilus CDBB-B-1893 during the anaerobic biotransformation process of agro-sugarcane waste

Abstract

Abstract Agro-sugarcane Waste (ASW) is generated during manual harvest of sugarcane and burning, this represents an environmental issue due greenhouses gases are generated, and they are not treated correctly but represent a rich source of nutrients to obtain valuable biological products with an economic and environmental interest. However, there are few works that have reported information on the growth kinetics of the process to obtain subproducts and their advantages. The aim of this study was to develop growth kinetics of Lactobacillus acidophilus CDBB-B-1893 during the anaerobic bioconversion process of ASW, which was carried out in a laboratory-scale stainless steel reactor with a capacity of 5 L at different agitation speeds 100, 150, and 200 rpm at 37°C by 72 h, and kinetics parameters were obtained by Gompertz, Gompertz Generalized, and Logistic models. Considering an initial carbohydrate concentration of 58.46 g L− 1, at 100 rpm a µmax of 0.2164 h− 1 was calculated, and 54.16 g LA L− 1 (0.8740 g LA g carbohydrates− 1), and 154.65 g biomass L− 1 were produced. The kinetics parameters values for anaerobic biotransformation process of sugarcane residues let propose operation conditions to maximizer LA and biomass production and represent an attractive strategy to obtain high value-added products in both phases of the final product, which is obtained without greenhouses gases production.