A method for roasting coffee beans comprising the steps of a) heating thecoffee beans until the temperature of the coffeebeans is at least 180°C； b) injecting a stream of oxygen-containing gasinto the flow of hot air after the burner； and c) maintaining theinjection of the stream of oxygen-containing gas until the end of the roastingprocess to mitigate the concentration of carbon monoxidein the roasting chamber, and wherein the coffee beans are roasted in arotating fluidized bed roaster.
