Inderscience Publishers

Effect of pepper and onion as additives on groundnut oil expression

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Courtesy of Inderscience Publishers

The effect of pepper and onion on the yield of oil expressed from groundnut paste was investigated. The results showed that oil expressed from groundnut with pepper as additive has the highest average yield in comparison with oil obtained using onion as the additive or without additives. Oil yields obtained when pepper was added at low and high levels were 31 ml and 35 ml per 100 g of groundnut, respectively. When onion was added at low and high levels, the yields were 26.6 ml and 20.3 ml per 100 g of groundnut, respectively; while the yield with no additive was 22.3 ml per 100 g of groundnut. The results suggest the suitability of pepper as an additive to increase oil yield from groundnut. Optimum conditions for maximum yield of oil from 100 g of groundnut paste are recommended.

Keywords: additives, groundnuts, groundnut oil, oil expression, onion, pepper, oil yield

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