Kinetics of simultaneous degradation of 4-bromophenol and 4-chlorophenol by Arthrobacter chlorophenolicusA6

Abstract

Biodegradation of p-bromophenol (4-BP) along with p-chlorophenol (4-CP) was investigated in batch shake flasks using a actinomycetes strain of Arthrobacterchlorophenolicus A6. A Two level full factorial design at two different levels (low and high) was applied to perform the biodegradation of 4-CP and 4-BP in the mixed substrate system. Result reveals that the presence of 4-CP in low concentration range in the mixture (20-60 mgl -1 ) did not inhibit 4-BP biodegradation by the actinomycetes. However, at high concentration range of 4-CP (100-200 mgl -1 ), the 4-BP biodegradation was inhibited. Further, 4-BP degradation was faster than 4-CP. In order to study variation in the specific degradation rate of these pollutants and their interaction effect exist between them, the experimental data were fitted to a sum kinetics model. The experimental data have been fitted with the model with a high correlation coefficient value (R 2 > 0.94). The model fitted data reveals a strong negative interaction effect of 4-CP on biodegradation of 4-BP by the A. chlorophenolicusA6.

Stability Analysis of a Chemostat Model for Phenol and Sodium Salicylate Mixture Biodegradation

“…[22][23][24][25]. The SKIP models describe well the biodegradation by different microorganisms of various mixtures of interacting phenolic pollutants in wastewater: phenol and p-cresol or phenol and resorcinol by Gliomastix indicus MTCC 3869 [12]; phenol and SA by Pseudomonas putida [14][15][16]; 4-bromophenol and 4-chlorophenol by Arthrobacter chlorophenolicus A6 [26].…”