“…Investigations of multistage configurations of radial (6-SBDT, BT-6, 4-straight blade disc turbine 4-SBDT, 6-curved blade disc turbine 6-CBDT, 6-arrowy blade disc turbine 6-ABDT, Smith turbine half pipe blades HDY675, hollow-type six-bladed concave disk turbine CD-6, and centripetal turbine CEPET) and down-pumping impellers (PROP, A315, 3-pitched blade impeller 3-PB, 3-blade hydrofoil impeller 3-HYDRO, and profiled triblade TRIB) in cultivation broth can be found with reactor liquid volumes reaching from V = 2-5 L [24,26] over V = 10-35 L [23,27] and up to V = 12-130 m 3 [25,28]. With the exception of Xia et al [23] who cultivated bacteria, in all other cases, the cultivation of fungi was investigated.…”