Optimization of microwave assisted screw press Pili (Canarium ovatum) pulp oil extraction

Date

4-2013

Degree

Bachelor of Science in Agricultural Engineering

Major Course

Major in Agricultural and Bio-Process Engineering

College

College of Engineering and Agro-Industrial Technology (CEAT)

Adviser/Committee Chair

Casas, Edgardo V.

Committee Member

Peralta, Engelbert K.

Abstract

The most valuable component of the pili fruit is the nut the oil-bearing pulp is usually discarded. This study aimed to extract oil from the pulp by microwave-assisted screw press extraction. The effects of microwave power, heating duration as pretreatments, and the cake outlet clearance were considered to determine the optimum conditions. For the pretreatment, the samples were heated in the microwave oven using microwave power settings of 1100, 1120, and 1140W with durations of 3, 5 and 7 minutes.The cake outlet clearance was adjusted to 2, 4 and 6mm. The Box-Behnken was determined using Response Surface Regression Optimization aided by response desirability approach that pointed to the optimum condition of the combination of 1100W, 3 minutes heating time and 6mm expeller clearance. However, the ANOVA results showed that among the three independent factors only the expeller clearance has a significant effect on the oil yield. It was also found that the lack-of-fit is significant which indicates that the parameters used might not be enough, hence further experimentation must be made. The oil yield of the existing method is 3.7% by manual pressing. This study showed a predicted oil yield of 3.4% at optimum conditions but the verification runs showed an average of 4.04% which is higher than the existing method by Minda Yee. Mechanical pressing has technicallyl ower efficiency than the solvent method but the safety and simplicity of mechanical pressing, better preserved oil properties and the chemical-free extracted oil product are its big advantages over the solvent method (Uquiche et al., 2008). To be able to utilize these advantages, new methodologies that focus on the pretreatment of the sample prior to extraction to increase the oil yield is being studied which included microwave heating.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology

Call Number

LG 993.5 2013 A2 G66

Document Type

Thesis

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