Optimization of Lipase Production from Aspergillus terreus by Response Surface Methodology and Its Potential for Synthesis of Partial Glycerides Under Solvent Free Conditions

摘要

Aspergillus terreus produces lipase 7.01 IU/ml in 96 h after optimization by one variable at a time method. Using the significant factors i. e. corn oil (A), sodium nitrate (B), casein (C), agitation rate (D) and incubation period (E) RSM was carried out resulting in 19.65 IU/ml from the combination +1(A), -1(B), -1(C), +1(D) and 0(E). The interactions between sodium nitrate, casein and agitation with corn oil were most significant. Scale up of production from 250 ml shake flask to 30 l bioreactor resulted in increased productivity of 0.52 IU/ml/h as against 0.2 IU/ml/h obtained in shake flasks. This lipase could carryout solvent free synthesis of partial glycerides of oleic acid with 96% efficiency in 12 h.