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|Title:||Inhibition of p-cresol on aerobic biodegradation of carbazole, and sodium salicylate by Pseudomonas putida||Authors:||Yu, Y.-G.
|Issue Date:||2002||Citation:||Yu, Y.-G., Loh, K.-C. (2002). Inhibition of p-cresol on aerobic biodegradation of carbazole, and sodium salicylate by Pseudomonas putida. Water Research 36 (7) : 1794-1802. ScholarBank@NUS Repository. https://doi.org/10.1016/S0043-1354(01)00387-6||Abstract:||A PAH- and phenol-degrading microorganism, Pseudomonas putida (ATCC 17484), was used to study the substrate interactions during cell growth on carbazole-containing mixtures with p-cresol and sodium salicylate. Both p-cresol and sodium salicylate could be utilised by the bacteria as the sole carbon and energy sources. When cells grew on the mixture of carbazole, p-cresol and sodium salicylate, strong substrate interactions were observed. Carbazole degradation started only after p-cresol was significantly or completely removed, and the removal of carbazole was incomplete when the initial p-cresol concentration was higher than 20mg/l. No carbazole was removed at all when the initial p-cresol concentration in the system was higher than 120mg/l. When cells grew on the ternary substrates, the specific growth rate was found to increase with p-cresol concentration up to 50mg/l (from 0.33 to 0.45h-1) but decreased monotonically with higher concentrations. At 120mg/l p-cresol, specific growth rate fell to 0.33h-1. The inhibitory effect of p-cresol was demonstrated where carbazole degradation was immediately halted when 50mg/l p-cresol was spiked to a system containing carbazole and sodium salicylate. Besides, the addition of p-cresol was also found to inhibit the degradation of sodium salicylate. With p-cresol, an increase in lag time was observed and the utilisation of sodium salicylate as carbon source was severely retarded. Copyright © 2002 Elsevier Science Ltd.||Source Title:||Water Research||URI:||http://scholarbank.nus.edu.sg/handle/10635/92054||ISSN:||00431354||DOI:||10.1016/S0043-1354(01)00387-6|
|Appears in Collections:||Staff Publications|
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