a laboratory stirred tank bioreactor with six single and dual-impeller configurations was tested to obtain the optimum operating conditions for future biological processes. six impeller combinations consisting of three basic impeller types, namely rushton turbine (rt), pitched 4blade (p4b) and pitched 2blade (p2b) downward flow were investigated in 1.77 l bioreactor working volume. power consum...

an experimental study has been conducted on the hydrodynamics of a stage mixer-settler to obtain an appropriate design. in this paper several tests was performed to investigate full factorial design of experiments. since each test was repeated seven times, the repeatability of the test was confirmed (p=1 bar and t=25 °c). sauter diameter was determined by photographing both the mixer and settle...

There are as many measurement values of the true column hold-up volume, V0, techniques applied to evaluate this most important property in liquid chromatography (LC). The relative errors made on V0 measurements using conventional “non-retained” markers—such acetone, uracil, or thiourea reversed-phase (RPLC), benzene acenaphthene hydrophilic interaction (HILIC)—can be large ±30%. This situation ...