Enhancing the biodegradation of ibuprofen through factor analysis and kinetic modeling

Автор: Bazhutin G.A., Tyumina E.A., Selyaninov A.A., Vihareva E.V.

Журнал: Вестник Пермского университета. Серия: Биология @vestnik-psu-bio

Рубрика: Микробиология

Статья в выпуске: 4, 2023 года.

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Ibuprofen ranks as one of the most frequently detected pharmaceutical pollutants in water across many countries. Previous studies identified conditions for actinobacterial degradation of ibuprofen and developed a chromatographic analysis technique, enabling the measurement of residual ibuprofen levels during biodegradation. However, the impact of a complex interplay of factors on the dynamics of ibuprofen biodegradation remains insufficiently explored. The objective of this study was to enhance the biodegradation process of ibuprofen through a multifactorial experiment that controled key parameters and to predict changes in substance content and the time needed for process optimization using kinetic modeling. As a result of this study, varying the concentrations of glucose, n-hexadecane, inoculum, and pH values has enabled a remarkable reduction in the biodegradation process duration for ibuprofen (0.1 g/L), from 10 days to just 2 days when employing cosubstrates in quantities of 1.0 g/L, 10.0 ml/l, and adhering to the turbidity standard NTU-5, along with pH stabilization at 6.5. By applying the kinetic equation of the first-order derivative, dx/dt = -k x-1, we determined the parameter ‘k’ for the ibuprofen biodegradation rate to be 138.88÷146.84%2/h. The half-life (t1/2) was calculated as 25.54÷27.00 hours, and the process’s endpoint, t1/100, was refined to 34.05÷36.00 hours under the optimized conditions.

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Ibuprofen, actinobacteria, rhodococcus, biodestruction, factor analysis, kinetic modeling

Короткий адрес: https://sciup.org/147242766

IDR: 147242766   |   DOI: 10.17072/1994-9952-2023-4-328-336

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