石油炭化水素 醱酵에 있어 impeller의 크기와 攪拌速度가 攪拌效果에 미치는 影響을 數種의 flat-bladed turbine을 使用하여 究明하였다. 菌株로는 Rhodotorula種을 使用하였으며, 炭素數 12-14인 工業用 n-alkane을 炭素源으로 하여 28℃, pH4.0∼4.5 酸素供給速度 0.4 v. v. m. (Volume per volume per minute)의 條件下에서 醱酵를 進行하였다. 菌體收率, lag phase 및 generaition time은 impeller의 크기 및 攪拌速度에 의해 決定되는 攪拌所要動力에 직접 影響을 받았으며, 같은 動力入量에 對하여 generaition time에 미치는 攪拌所要動力의 影響은 impeller의 直徑이 큰 경우가 impeller blade 面積이 넓은 경우보다 效果的이었다.

The effects of agitation depending on impeller geometry and agitation velocity in hydrocarbon fermentation have been studied for flat-bladed turbines in laboratory scale fermentor. The microorganisms of Rhodotorula species were grown on n-alkane mixture of which carbon number ranged from 12 to 14 at 28℃, with pH range of 4.0-4.5 and at the oxygen flow rate of 0.4 of v. v. m. (vol./vol./min) in this experiment. Cell yield, lag phase and generation time were influenced directly by power input in agitation which was determined by impeller geometry and agitation velocity for a given medium. Even at the some power input the generation time was influenced more effectively by increasing impeller diameter than increasing blade area.