Aeration nozzle, and blockage removal method for said aeration nozzle

A method for removing aeration nozzle blockages wherein blockages are removed in a state in which an aeration nozzle is installed within a waste water processing tank,

• wherein said aeration nozzle has, on one end, an air supply port connected to an air supply source and a waste water suction port for suctioning waste water in a processing tank, and has a micro-bubble generation unit, provided facing the air supply port, for mixing air supplied by the air supply port and waste water suctioned from the waste water suction port and generating micro-bubbles, wherein
• the micro-bubble generation unit is configured to have a cylindrical body arranged in a position through which air fed by the air suction port passes, said cylindrical body comprising of a cylindrical main body and a plurality of blades projecting from said main body toward a center;
• and
• the blades of said cylindrical body are characterized by being configured such that base ends of the blades are fixed on the inner surface of the cylindrical body and each tip end is formed so as to face one another around the center of said cylindrical body;
• and
• by being formed from an elastic member, tip ends of the blades are configured so as to bend with the base ends as starting points,
• said method being characterized by having a step for widening a clearance between the blades by elastically bending the blades, which are formed from said elastic member, using a maintenance jig having one or a plurality of tip ends and inserting between the blades and twisting the tip ends of said maintenance jig.