Mathematical Modelling of Azo Blue Dye Degradation by Streptomyces DJP15

Abstract

Azo dyes are the most well-known synthetic dyes. They have been widely utilized as colorants in various sectors, including textiles, photography/printing, food, medicines, etc. This industry has produced a massive quantity of solid waste, soil slurry, and effluents which are mostly passed into the water bodies or the environments. These dyes tend to compromises the physical, chemical and biological nature of the environments. More so, they have significant health risks on the aquatic life, livestock and the whole environmental biodiversity. Furthermore, they are known to be carcinogenic. In this research, seven (7) different kinetics models, Huang, modified Richards, modified Logistics, modified Gompertz, Buchanan-3-phase, Baranyi-Roberts and von Bertalanffy, were utilized in modeling the growth of Streptomyces DJP15 growth in the degradation of azo blue dye. While all the models show good curve fitting, the von Bertalanffy model was found to be the best model with the lowest RMSE (0.410), AICc (0.58) and has the highest adjR2 (0.983). Thus, this study indicated that the growth of Streptomyces DJP15 on azo blue dye could be described mathematically. Notably, the parameters obtained can be utilized to predict the bioremediation of azo blue dye in the future.