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201.
Zeinab Salehi Farzaneh Vahabzadeh Morteza Sohrabi Shohreh Fatemi Hussein Tawfiq Znad 《Biodegradation》2010,21(4):645-657
The effect of p-nitrophenol (PNP) concentration with or without glucose and yeast extract on the growth and biodegradative capacity of Ralstonia eutropha was examined. The chemical constituents of the culture medium were modeled using a response surface methodology. The experiments
were performed according to the central composite design arrangement considering PNP, glucose and yeast extract as the selected
variables whose influences on the degradation was evaluated (shaking in reciprocal mode, temperature of 30°C, pH 7 and test
time of about 9 h). Quadratic polynomial regression equations were used to quantitatively explain variations between and within
the models (responses: the biodegradation capacity and the biomass formation). The coefficient of determination was high (R
adjusted2 = 0.9783), indicating the constructed polynomial model for PNP biodegradative capacity explains the variation between the
regressors fairly well. A PNP removal efficiency of 74.5% occurred within 9 h (15 mg/L as the initial concentration of PNP
with use of yeast extract at 0.5 g/L). 相似文献
202.