Production of propionic acid by microbiological way. Part 1. Influence of the initial sugars and product concentrations |
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Authors: | M C Obaya J Ramos F Eng P Villa E Valds A Martínez J Gonzlez E Berovides I Williams M Chivas A Cuellar |
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Institution: | M. C. Obaya,J. Ramos,F. Eng,P. Villa,E. Valdés,A. Martínez,J. González,E. Berovides,I. Williams,M. Chivas,A. Cuellar |
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Abstract: | The best yields and productivities of 0.38 g · g?1 and 0.35 g · l?1 h?1, respectively, for the propionic acid production in a batchsystem using sugar-cane final molasses as carbon source were obtained when an initial TRS concentration of 50 g · l?1 was used. It was obvious that this process is severely inhibited by the acids produced and the most drastic effect (μ = 0) was at a TVA concentration near to 250 mmol · l?1, independently of the initial TRS concentration employed. A generalizated equation of noncompetitive inhibition was adjusted: and kinetic inhibition constants for each initial TRS concentration studied were estimated. |
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