Journal
ENVIRONMENTAL TECHNOLOGY
Volume 44, Issue 14, Pages 2171-2183Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2021.2024886
Keywords
Nitrobenzene biodegradation; biokinetic modeling; wide adaptability; response surface methodology
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Strain NB-1, identified as Pseudomonas frederiksbergensis, efficiently degrades nitrobenzene and shows high adaptability to cold and alkaline conditions. Response surface methodology using the Haldane-Andrews model was applied to guide the treatment of nitrobenzene wastewater by NB-1, optimizing the growth conditions under different nitrobenzene concentrations.
Strain NB-1, which can efficiently degrade nitrobenzene, was identified as Pseudomonas frederiksbergensis. NB-1 was resistant to cold and alkali with the widest temperature (4-35 degrees C) and pH (5-11) adaptive range, compared with other reported nitrobenzene-degrading microorganisms. Based on the Haldane-Andrews model, the real maximum specific growth rate mu(m)', specific affinity a(A), and inhibition coefficient K-i were used in response surface methodology (RSM) simultaneously for the first time to guide NB-1 to treat nitrobenzene wastewater. According to the RSM model, the environmental factors (temperature, pH, salinity) corresponding to the optimal values of mu(m)', a(A), and K-i were determined. By comparing the specific growth rates corresponding to the optimal values of mu(m)', a(A), and K-i, respectively, the optimum growth conditions of NB-1 were determined under different nitrobenzene concentrations. The study of mu(m)', a(A), and K-i by RSM provided a new approach for a more accurate optimization of biological wastewater treatment conditions. [GRAPHICS]
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