Premium
Optimization of laccase production by Pleurotus ostreatus IMI 395545 using the Taguchi DOE methodology
Author(s) -
Periasamy Rathinasamy,
Palvannan Thayumanavan
Publication year - 2010
Publication title -
journal of basic microbiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.58
H-Index - 54
eISSN - 1521-4028
pISSN - 0233-111X
DOI - 10.1002/jobm.201000095
Subject(s) - laccase , pleurotus ostreatus , taguchi methods , yeast extract , response surface methodology , fermentation , yield (engineering) , chemistry , industrial and production engineering , design of experiments , orthogonal array , microbiology and biotechnology , food science , pulp and paper industry , biochemistry , mathematics , chromatography , enzyme , biology , materials science , engineering , mushroom , statistics , metallurgy , electrical engineering
Production of laccase using a submerged culture of Pleurotus orstreatus IMI 395545 was optimized by the Taguchi orthogonal array (OA) design of experiments (DOE) methodology. This approach facilitates the study of the interactions of a large number of variables spanned by factors and their settings, with a small number of experiments, leading to considerable savings in time and cost for process optimization. This methodology optimizes the number of impact factors and enables to calculate their interaction in the production of industrial enzymes. Eight factors, viz. glucose, yeast extract, malt extract, inoculum, mineral solution, inducer (1 mM CuSO 4 ) and amino acid (l‐asparagine) at three levels and pH at two levels, with an OA layout of L18 (2 1 × 3 7 ) were selected for the proposed experimental design. The laccase yield obtained from the 18 sets of fermentation experiments performed with the selected factors and levels was further processed with Qualitek‐4 software. The optimized conditions shared an enhanced laccase expression of 86.8% (from 485.0 to 906.3 U). The combination of factors was further validated for laccase production and reactive blue 221 decolorization. The results revealed an enhanced laccase yield of 32.6% and dye decolorization up to 84.6%. This methodology allows the complete evaluation of main and interaction factors. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)