Optimization of bioprocesses with Brewers' spent grain and Cellulomonas uda.

ABSTRACT: Brewers' spent grain (BSG) is a low-value by-product of the brewing process, which is produced in large quantities every year. In this study, the lignocellulosic feedstock (solid BSG) was used to optimize fermentations with Cellulomonas uda. Under aerobic conditions, maximum cellulase activities of 0.98 nkat∙mL^-1, maximum xylanase activities of 5.00 nkat∙mL^-1 and cell yields of 0.22 g_Cells∙g_BSG ^-1 were achieved. Under anaerobic conditions, enzyme activities and cell yields were lower, but valuable liquid products (organic acids, ethanol) were produced with a yield of 0.41 g_Prod∙g_BSG ^-1. The growth phase of the organisms was monitored by measuring extracellular concentrations of two fluorophores p

SUBMITTER: Akermann A 

PROVIDER: S-EPMC8961044 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature