Caffeine reduction apparatus and method of manufacturing coffee grounds powder using same

A method of manufacturing a coffee grounds powder, the method comprising:

• inputting coffee grounds into a container in which rotatable blades are provided;
• supplying water into the container at a predetermined level by operating a water level controlling portion by a controller such that the coffee grounds input into the container are submerged in the water;
• heating the water in which the coffee grounds are submerged by operating a heater by the controller such that caffeine is eluted from the coffee grounds;
• emitting ultraviolet rays to the water in which the caffeine is eluted from the coffee grounds by operating an ultraviolet ray emitter by the controller such that the caffeine included in the water is decomposed by the ultraviolet rays;
• controlling an amount of an additive, including at least one of hydrogen peroxide, hydrochloric acid, and sodium hydroxide, input into the water in which the caffeine is decomposed by the ultraviolet rays by operating an additive input portion by the controller while sensing a pH inside the container using a pH sensing portion connected to the controller such that the pH inside the container is maintained to a predetermined level;
• discharging the water in which the additive is added to an outside of the container by operating the water lever controlling portion by the controller;
• drying the coffee grounds remained in the container by operating the heater and rotating the rotatable blades by the controller;
• and
• mixing a viscous additive with the coffee grounds dried in the container by controlling the additive input portion and rotating the rotatable blades by the controller.