Kinetics of bacterial cellulose formation in soybean-boiled wastewater medium during fermentation utilizing real-time image processing

Abstract

Abstract The bacterial cellulose (BC) fermentation is affected by environmental growth conditions such as pH, temperature, and turbidity. During the fermentation, a real-time image processing method was applied to observe the BC growth by using soybean-boiled wastewater and coconut water as a mixture. Cellulose will be produced and discharged into the medium throughout the fermentation process to form BC sheets, which will gradually become visible. The purpose of this study is to investigate the correlation between the growth parameters of BC and to analyze the formation of BC kinetically, using the Gompertz model on medium without additional nitrogen source and medium with additional nitrogen sources during the fermentation process. The strongest correlation result was found between time and thickness of BC formed without an additional nitrogen source, and with sodium glutamate as the nitrogen source. The Gompertz model equation was suitable for predicting the kinetics of BC formation time and thickness based on the available data. Both mediums exhibited three clusters that represented the adaptation stage, the exponential stage, and the stationary stage during the fermentation process. The addition of a nitrogen source to the medium resulted in thicker BC sheets compared to the medium without this addition.