Fig. 2
From: Periodic-peristole agitation for process enhancement of butanol fermentation
The comparison of agitation characteristics between PPG and TIG. a velocity distribution within PPG; b velocity distribution within TIG; c the turbulence intensity distribution within PPG; d the turbulence intensity distribution within TIG. PPG represents periodic-peristole group, TIG represents traditional Rushton impeller agitation group, and SG represents stationary culture group