Microbial degradation of quinoline: Kinetic studies with Comamonas acidovorans DSM 6426

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Abstract
The microbial degradation of quinoline by Comamonas acidovorans was studied in a laboratory scale stirred tank reactor. In continuous culture experiments using quinoline as a sole source of carbon and nitrogen, it was shown by means of mass balances that quinoline was converted completely to biomass, carbon dioxide, and ammonia. Degradation rates up to 0.7 g/L h were obtained. Measured yield coefficients Yx/s for quinoline were about 0.7 g/g, which is in agreement with the theoretical value for complete mineralization. Kinetic constants based on Haldane substrate inhibition were evaluated. The values were μmax = 0.48 h−1, Ki = 69 mg/L, and Ks < 1.45 mg/L. © 1993 John Wiley & Sons, Inc.