OXYGEN-TRANSFER AND SCALE-UP IN BIOREACTORS USING HYDRO-EJECTORS FOR GAS-LIQUID CONTACTING

The commonly used scale-up criteria are investigated for their applica bility in the case of hydro-ejector reactors. In combination with the liquid jet momentum, which characterizes the hydro-ejector, a scale-up correlation with the oxygen transfer rate as scale-up criterion is pr oposed, independent of the type of hydro-ejector and the reactor confi guration. The results with regard to the power input are compared with those of stirred tank and bubble column. Its competitiveness is at hi gh power per volume input and above all in large scale reactors.