Kinetics of chromium (VI) reduction and phenol biodegradation by Pseudomonas sp. JF122.

Kinetics of chromium (VI) reduction and phenol biodegradation by a pure culture of Pseudomonas sp. JF122 was studied. High inoculum (volume) increased both chromium (VI) reduction and phenol biodegradation velocity, which are ascribable to shorter acclimation period requirement for cell growth. Haldane's kinetics model adequately described the substrate kinetics with kinetic constants μ(max1) =0.113 h⁻¹, K(s1) = 0.4009 mM, K(i1) =5.165 mM for chromium (VI) reduction and μ(max2) =0.3081 h⁻¹, K(s2) =7.411 mM K(i2) =2.511 mM for phenol biodegradation. Further, the growth yield for phenol biodegradation and chromium (VI) reduction were 30.6 mg cell/mmol phenol and 8880.2mg cell/mmol Cr (VI), respectively.