In this work, data regarding the power consumption in a gas-liquid system, using standard and modified Rushton turbine agitators, positioned singly or doubly on same shaft, were presented. The modified blades were obtained through the increase of the blade height of the Rushton turbine, simultaneously with the surface discontinuation through the application of perforations. The full surface of the modified blade is equal to the witness blade surface of the Rushton turbine. The surface fraction of the perforations S-G/S-C is between 0-0.588. The empirical equations for the estimation of gassed power consumption, were expressed depending on the stirrer speed, gas flow rate, geometry and number of the blades.