An explosives expert told CNN the yellowness of the flame probably came from carbon or some organic fuel such as sugar that contains it.

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The brothers power their farm and cheese factory using an anaerobic digestion system, which turns organic waste into fuel, and cuts down on greenhouse gas emissions.

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The company is the maker of the auto fuel called E10, which is a blend of 90% normal fuel and 10% organic biofuel, similar to a variety that has been sold in the United States for the last ten years.

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It develops anaerobic digesters that convert organic waste into biogas used to generate electricity, heat, natural gas and motor vehicle fuel (CNG). quasar already operates eight facilities in Ohio, and several more are in process in the Buckeye State and elsewhere.

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Bacteria oxidize the organic matter and, in the process, produce electrons that run from the anode to the cathode within the fuel cell, creating an electrical current.

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