Optimization of Elae?s guineensis Palm Sap Extraction Process using Doehlert Method for Extraction Time Reduction and Palm Heart Preservation

This study was led in order to evaluate the influence of some factors on sap extraction process from oil palm trees, for reduction of extraction time (DE) and preservation of palm heart (CPE) quantity at the end of aforesaid extraction. To do this, controllable and influential factors were sought first. Then, an experiment design based on the Doehlert method was applied for the optimization of the study factors. As results, controllable and influencing factors in the sap extraction process such as daily incision numbers (NI), incision surface (SI) and thickness of polyurethane sponge (EM) were retained. Experimentation has shown that to reduce sap extraction time and preserve more quantity of palm heart at the end of sap extraction from oil palm tree, a maximum of three daily incisions must be done in the palm heart. Then, the thickness of the polyurethane sponge and the incision surface must be kept at their optimum levels. Under these conditions, about two thirds of the initial weight of the palm heart can be preserved at the end of sap extraction time estimated to about three weeks.