Returning to the GATE system I blogged about previously (http://www.digivu.co.za/2008/05/solar-dryer-detailed-design-link/) this manual on edible oil extraction is outstanding.
The manual focusses on three case studies of the small scale expelling of sunflower, shea and palm oil, It also presents general in depth information on the world market, oil science, descriptions of all oilseed and plants, [...]

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