L. John Fry: Methane Digester and Methane Fuel Innovator

An extended interview with L. John Fry, who as a pig farmer in South Africa in the late 1950s/early 1960s developed his own anaerobic methane digester technology to generate methane fuel from organic waste.

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Fry adjusting a 13 h.p. diesel engine converted to run on methane gas. 
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