title: Response surface methodology for optimization of production of lovastatin by solid state fermentation.
abstract: Lovastatin, an inhibitor of HMG-CoA reductase, was produced by solid state fermentation (SSF) using a strain of Aspergillus terreus UV 1718. Different solid substrates and various combinations thereof were evaluated for lovastatin production. Wheat bran supported the maximum production (1458 ± 46 µg g(-1) DFM) of lovastatin. Response surface methodology (RSM) was applied to optimize the medium constituents. A 2(4) full-factorial central composite design (CCD) was chosen to explain the combined effects of the four medium constituents, viz. moisture content, particle size of the substrate, di -potassium hydrogen phosphate and trace ion solution concentration. Maximum lovastatin production of 2969 µg g(-1) DFM was predicted by the quadratic model which was verified experimentally to be 3004 ± 25 μg g(-1) DFM. Further RSM optimized medium supplemented with mycological, peptone supported highest yield of 3723.4±49 µg g(-1) DFM. Yield of lovastatin increased to 2.5 fold as with compared to un-optimized media.
authors.affiliation: Food Engineering and Technology Department, Institute of Chemical Technology, University of Mumbai , Matunga east, Mumbai-400 019 , India.
authors.forename: Ruchir C
authors.initials: RC
authors.lastname: Pansuriya
authors.forename: Rekha S
authors.initials: RS
authors.lastname: Singhal
keywords: Aspergillus terreus; lovastatin; response surface methodology; solid state fermentation
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