Fitschen, JürgenJürgenFitschenMaly, MarcMarcMalyRosseburg, AnnikaAnnikaRosseburgWutz, JohannesJohannesWutzWucherpfennig, ThomasThomasWucherpfennigSchlüter, MichaelMichaelSchlüter2019-12-172019-12-172019-11-13Chemie-Ingenieur-Technik 12 (91): 1794-1801 (2019)http://hdl.handle.net/11420/3976Despite the fact that aerated stirred tank reactors are widely used in industry and often studied, their design and scale-up still remains challenging. Especially the specific power input is a crucial and geometry-dependent scale-up parameter, usually calculated with the dimensionless power number Po. Within the scope of this study, the power number is measured for different stirrer types and configurations in a laboratory and an industrial-scale aerated stirred tank reactor. Good agreements to literature are found for the unaerated case for the two-stage stirrer configurations at different stirrer spacing for both scales. By literature only the aerated case in the laboratory scale can be predicted. Scale-up of an aerated industrial-scale reactor is challenging because of a specific influence of the aeration. In case of a three-stage Rushton configuration, an asymmetrical distribution of the stirrers should be preferred to ensure a high power number as well as good power performance under aerated conditions.en0009-286X20191217941801Wiley-VCH Verl.https://creativecommons.org/licenses/by-nc/4.0/aerated stirred tank reactorspower input performancescale-upChemieIngenieurwissenschaftenJournal Article10.15480/882.253310.1002/cite.20190012110.15480/882.2533Journal Article