Phenol Degradation in Aqueous Solutions by Pseudomonas sp. Isolated from Contaminated Soil of Mining IndustryMahendra Aryal, Maria Liakopoulou-Kyriakides
ABSTRACT Batch experiments were performed for
different initial phenol concentrations in the presence of glucose to observe cell growth and associated phenol degradation using Pseudomonas sp. cells. It was observed that phenol degradation increases
with increasing the tolerance of the cells to phenol inhibition using glucose
in the growth medium. The maximum
phenol biodegradation was achieved at pH 7.0, glucose concentration 1.0 g/L and
incubation temperature 30oC, respectively. The specific growth rate of Pseudomonas sp. increases with increase
in initial phenol concentration ranging from 10 to 25 mg/L and then decreases
to the initial phenol concentration followed to 300 mg/L. Haldane growth kinetic model
fitted better experimental data than Aiba and Edwards models. It was also found that removal efficiency of Pseudomonas sp. for phenol decreases from 51.5 to 9.5% with
increase in initial phenol concentration from 10 to 300 mg/L at 24 h. The
results showed that Pseudomonas sp. can be used to remove
the phenol from industrial waste waters.
Backdoi:10.11912/jws.2015.5.2.45-57
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