Abstract
ABSTRACTIn this study, reverse micellar extraction of papain model system was performed using cetyltrimethylammonium bromide (CTAB)/iso-octane/hexanol/butanol system to optimize the forward and back extraction efficiency (BEE). A maximum forward extraction efficiency of 55.0, 61.0, and 54% was achieved with an aqueous phase pH of 11.0, 150 mM CTAB/iso-octane and 0.1 M NaCl, respectively. Taguchi’s orthogonal array was applied to optimize the pH of stripping phase, concentration of isopropyl alcohol (IPA) and potassium chloride (KCl) for maximizing BEE. The optimal levels of stripping phase pH, concentration of IPA and KCl were found to be 6, 20% (v/v), and 0.8 M, respectively. Under these optimal levels, the BEE was found to be 88% after which enzyme activity was recovered with 2.5-fold purification. Further optimization was performed using artificial neural network-linked genetic algorithm, where the BEE was improved to 90.52% with pH 6, IPA (%) = 19.938, and KCl (M) = 0.729.
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