TITLE:
Optimisation of Decolourisation Conditions of Crude Shea (Vitellaria paradoxa Gaertner F) Butter: Yellow Type
AUTHORS:
A. M. Mohagir, C. F. Abi, N. D. Bup, R. Kamga, C. Kapseu
KEYWORDS:
Yellow Shea Butter, Decolourisation, Doehlert Experimental Matrix, RSM, Optimisation
JOURNAL NAME:
Advances in Chemical Engineering and Science,
Vol.5 No.4,
October
23,
2015
ABSTRACT: In this study, response surface methodology applying Doehlert experimental design was used to optimise decolourisation parameters of crude yellow shea butter. The decolourisation process was significantly influenced by three independent parameters: contact time, decolourisation temperature and adsorbent dose. The responses of the process were oil loss, acid value, peroxide value and colour index. Contour plots of the decolourisation responses were superimposed and well defined the optimum zone. The optimum decolourisation conditions were found to be: contact time (30 min), decolourisation temperature (80℃ - 95℃) and adsorbent dosage (1 - 2 mass%). These conditions gave decolourised shea butter with the following responses; oil loss (6.2% ± 0.2%), peroxide value (1.7 ± 0.1 meq O2/kg), colour (0.21 ± 0.05 Lovibond yellow) and acid value (25.6 ± 0.7 mg KOH/g).