నైరూప్య

Effect of Fe (III) on M-Dichlorobenzene Removal by Brevibacillus agri Dh-1

Bairen Yang, Yue Li, Zhuqiu Sun, Cheng Ding, Zhaoxia Li, Qi Xu and Liping Wang

In this work, a strain, Brevibacillus agri DH-1, isolated from the soil of eastern coastal china was used to remove m-dichlorobenzene. Impact of Fe (III) on m-dichlorobenzene removal in a biotrickling filter is studied. After 48 h culturing, the optimal concentrations of Fe (III) is obtained according to microorganism growth and m-dichlorobenzene separation in a biotrickling filter. The predicted optimal concentration of Fe (III) is 4 mg/L. The fitting of Haldane-Andrews model for growth kinetics are still suitable in the optimum concentration of Fe (III), and the values of μ_max, Ksi and KI were estimated at 0.07 h^-1, 46.21 mg.L⁻¹ and 155.49 mg.L⁻¹, respectively. Degradation kinetic was also fitted well by the pseudo first-order, but the reduction of ln(c) becomes faster with incubation time due to the effect of Fe (III). In addition, the chloride ion concentration and C₁₂O enzyme activity was measured, and it showed that Fe (III) could considerably improve the efficiency of antichloration and ring opening.