Designed by Dr. Manolito C. Bulaong of the Postharvest Engineering Department (PHED) of the Bureau of Postharvest Research and Extension (BPRE) for its Maize Aflatoxin Control System (MACS) project, the biomass furnace is cheaper to use than the diesel burner in heating the mechanical dryer.
Unlike the diesel burner which consumes 20 liters of diesel per hour at 85°C drying air temperature, the furnace utilizes both rice hull and corncobs as fuel. It has boiler tubes with a diameter of 2.5 inches which serve as heat exchanger and this produces a clean, smoke-free hot air. Its drying time ranges from 6 to 8 hours per batch at an initial moisture content ranging from 24 to 31 percent.
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