The research arm of D1 Oils plc says it has developed and is patenting, a process that expels crude biodiesel oil from Jatropha seeds and at the same time purifies the seedcake (meal) left after oil extraction to produce high protein animal feed.rnThe residual Jatropha seedcake more typically left after oil extraction is currently burnt or used as fertilizer, but D1 has developed a purification process to make it suitable for animal feed - which adds little to the cost of conventional oil extraction.
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