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Peanut butter milling

Reinventing the mill

George Omondi quickly realised the potential of the peanut butter mill when he saw the plans from Zimbabwe. However, he thought that he could improve the design.

He decided to begin by making a prototype based on the Zimbabwean design. This quickly revealed problems with the machine. The original version used aluminium sheets for the grinding container, which George found could contaminate the butter. The grinding process was very slow and if too many nuts were put into the grinding container at once the machine broke down.

George modified the design to make the mill more powerful, reliable, hygienic and efficient. Peanuts, including their skins, are poured from a cup into a small hole in the lid of a grinding container. They slowly drop through the hole, where the blades rotate and crush them into a fine semi-liquid. This falls through a mesh, down a chute and into a container below. The new machine can make 90 kilograms of peanut butter in eight hours.

Jane Ondiango's story

Hiring machines

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Practical Action - Technology challenging povertyEuropean Commission - Department for International Development

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