Improvement of the Performances of a Gas-Inducing System for Application in Wastewater Treatment

Turboxal™, a mixing system used for the oxygenation and the mixing of wastewater biological treatment tanks previously studied, shows a low gas flooding rate. In order to increase the gas flooding rate, two of the three impellers used are replaced by only one new turbine. This new turbine comes from a previous work and has been designed partially by computational fluid dynamics (CFD). The gas flooding rate of the new system, called Turboxal-2™, is increased of about 120% on average compared to the Turboxal™ standard and the mass transfer capacities of the new system are quite similar to those of the previous device.