title: Statistical optimization of medium components and growth conditions by response surface methodology to enhance phenol degradation by Pseudomonas putida.
abstract: In this work, a four-level Box-Behnken factorial design was employed combining with response surface methodology (RSM) to optimize the medium composition for the degradation of phenol by pseudomonas putida (ATCC 31800). A mathematical model was then developed to show the effect of each medium composition and their interactions on the biodegradation of phenol. Response surface method was using four levels like glucose, yeast extract, ammonium sulfate and sodium chloride, which also enabled the identification of significant effects of interactions for the batch studies. The biodegradation of phenol on Pseudomonas putida (ATCC 31800) was determined to be pH-dependent and the maximum degradation capacity of microorganism at 30 degrees C when the phenol concentration was 0.2 g/L and the pH of the solution was 7.0. Second order polynomial regression model was used for analysis of the experiment. Cubic and quadratic terms were incorporated into the regression model through variable selection procedures. The experimental values are in good agreement with predicted values and the correlation coefficient was found to be 0.9980.
authors.affiliation: Graduate Institute of Environmental Engineering, National Central University, Chung-Li 320, Taiwan, ROC. gannadurai@gmail.com
authors.forename: Gurusamy
authors.initials: G
authors.lastname: Annadurai
authors.forename: Lai Yi
authors.initials: LY
authors.lastname: Ling
authors.forename: Jiunn-Fwu
authors.initials: JF
authors.lastname: Lee
mesh_terms: D000645:Ammonium Sulfate / Q000494:pharmacology; D001673:Biodegradation, Environmental / Q000187:drug effects; D001688:Biological Products / Q000494:pharmacology; D003470:Culture Media / Q000494:pharmacology*; D005947:Glucose / Q000494:pharmacology; D019800:Phenol / Q000378:metabolism*; D016958:Pseudomonas putida / Q000378:metabolism*; D012107:Research Design; D012965:Sodium Chloride / Q000494:pharmacology; D015003:Yeasts / Q000737:chemistry
chemical_list: D001688:Biological Products; D003470:Culture Media; D019800:Phenol; D012965:Sodium Chloride; D005947:Glucose; D000645:Ammonium Sulfate