Biodegradation kinetics of Bi-substrate solution of phenol and resorcinol in an aerobic batch reactor

Brominated phenols are listed as priority pollutants, and are the key components of paper pulp wastewater together with nitrophenol and chlorophenol. However, the biodegradation of bromophenol in a mixed substrate system is very scanty. In the present investigation, simultaneous biodegradation kinetics of three substituted phenols were investigated using Arthrobacter chlorophenolicus A6. A 2 3 full factorial design was applied with varying 4-BP and 4-CP from 75-125 mgl − 1 and4-NP from 50-100 mgl − 1 . Almost complete degradation of this mixture of substituted phenols was achieved at an initial concentration combination of 125, 125, and 100 mgl − 1 of 4-CP, 4-BP, and 4-NP, respectively in 68 h. Statistical analysis of the results revealed that among the three variables, 4-NP had the most prominent in uence on both degradations of 4-CP and 4-BP. While the concentration of 4-CP had a strong negative interaction effect on the biodegradation of 4-NP. Irrespective of the concentration levels of these three substrates, 4-NP was preferentially biodegraded over 4-CP and 4-BP. Further, 4-BP biodegradation rates were found to be higher than that of 4-CP followed by 4-NP. Besides, the variation of biomass yield coe cient of the culture was investigated at different initial concentration combinations of these substituted phenols. Although the actinomycetes consumed 4-NP at a faster rate, the biomass yield was very poor. This revealed that the microbial cells were more stressed when grown on 4-NP compared to 4-BP and 4-CP. Overall, this study revealed the prospective of A. chlorophenolicus A6 for the degradation of 4-BP in mixed substrate systems.

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Microbial degradation of phenolic compounds

Shamsollahi

Partovinia

2022

Microbes and Microbial Biotechnology for Green Remediation

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Biodegradation kinetics of Bi-substrate solution of phenol and resorcinol in an aerobic batch reactor

Cited by 8 publications

References 21 publications

Anaerobic biodegradation of phenol in wastewater treatment: achievements and limits

Anaerobic biodegradation of phenol in wastewater treatment: achievements and limits

Co-metabolic biodegradation of 4-bromophenol in a mixture of pollutants system by Arthrobacter chlorophenolicus A6

Microbial degradation of phenolic compounds

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