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Coca-Cola Central Japan has installed something called the “eKOsystem,” a methane fermentation system which uses the coffee grounds and tea leaves left over from the manufacturing of coffee and tea-based drinks to provide heat and energy for the plant.

Relying on a waste to energy scheme should lower the company’s operating costs by reducing waste volumes and associated waste transport/processing costs, enable energy savings by use of generated methane gas in the plant, and reduce the environmental effects of CO2 that would normally get released into the atmosphere as the coffee and tealeaf waste ferments.