Abstract
This study optimized the simultaneous saccharification and citric acid (CA) production from banana pseudostem (BP). Thereafter, kinetic assessment of Aspergillus brasiliensis growth and CA production were determined for the optimum conditions using fresh water (SSFoptimizedFW) or dairy wastewater (SSFDWW) and compared to Sabouraud Dextrose Emmon’s medium modified with BP (SSFSDEmodified). The optimized conditions gave a CA concentration of 14.408 g/L. Kinetic assessment revealed the same maximum specific growth rates (μmax) (0.05 h−1) for all three bioprocesses, while the SSFSDEmodified process resulted in the highest maximum potential CA concentration (Pm) (13.991 g/L) in comparison to the SSFDWW (Pm = 13.095 g/L) and SSFoptimizedFW (Pm = 12.967 g/L) systems. Findings from this study facilitates the implementation of waste-based lignocellulosic bioprocesses that may eradicate the use of expensive pretreatment chemicals, fermentation medium constituents, and resources, in keeping with the water, energy and food nexus towards developing a circular bioeconomy.
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