Reciprocating stirring apparatus having micro bubble generating device

A reciprocating stirring apparatus, comprising:

• a stirring container into which an article to be stirred is inserted;
• a driving shaft provided in the stirring container and performing a reciprocating motion;
• a stirring blade connected/fixed so as to cross the driving shaft and to receive the reciprocating motion therefrom, wherein the stirring blade has a rectangular, an elliptic or an oval shape made of a long diameter and a short diameter, and
• a micro bubble generating device, wherein
• the micro bubble generating device includes a sparger formed of a porous body and a gas supply for supplying gas to the sparger,
• the gas supplied by the gas supply to the sparger is made to generate bubbles in the article to be stirred through pores of the porous body, and
• the sparger is tubular extending in an axial direction of the driving shaft and is provided on an outside of the long diameter of the stirring blade.