title: Application of statistical experimental designs for the optimization of medium constituents for the production of citric acid from pineapple waste.
abstract: Statistical experimental designs were applied for the optimization of medium constituents for citric acid production by Yarrowia lipolytica NCIM 3589 in solid state fermentation (SSF) using pineapple waste as the sole substrate. Using Plackett-Burman design, yeast extract, moisture content of the substrate, KH(2)PO(4) and Na(2)HPO(4) were identified as significant variables which highly influenced citric acid production and these variables were subsequently optimized using a central composite design (CCD). The optimum conditions were found to be yeast extract 0.34 (%w/w), moisture content of the substrate 70.71 (%), KH(2)PO(4) 0.64 (%w/w) and Na(2)HPO(4) 0.69 (%w/w). Citric acid production at these optimum conditions was 202.35 g/kg ds (g citric acid produced/kg of dried pineapple waste as substrate).
authors.affiliation: Center for Biotechnology, Department of Chemical Engineering, College of Engineering, Andhra University, Visakhapatnam 530 003, India. saratbabu_imandi@yahoo.com
authors.forename: Sarat Babu
authors.initials: SB
authors.lastname: Imandi
authors.forename: Veera Venkata Ratnam
authors.initials: VV
authors.lastname: Bandaru
authors.forename: Subba Rao
authors.initials: SR
authors.lastname: Somalanka
authors.forename: Sita Ramalakshmi
authors.initials: SR
authors.lastname: Bandaru
authors.forename: Hanumantha Rao
authors.initials: HR
authors.lastname: Garapati
mesh_terms: D031230:Ananas; D001671:Biochemistry / Q000379:methods; D019149:Bioreactors; D001709:Biotechnology / Q000379:methods*; D019343:Citric Acid / Q000032:analysis / Q000737:chemistry; D003470:Culture Media; D005285:Fermentation; D007218:Industrial Microbiology; D015233:Models, Statistical; D011336:Probability; D012107:Research Design; D025062:Yarrowia / Q000378:metabolism; D015003:Yeasts / Q000378:metabolism
chemical_list: D003470:Culture Media; D019343:Citric Acid