초록
<P><B>Abstract</B></P><P>Two‐parameter continuation and bifurcation analysis strategies were applied to deal with the oscillatory phenomena of a <I>Zymomonas mobilis</I> ethanol fermentation system. A structured verified non‐linear mathematical model considering the physiological limitations of microorganisms for a single continuous fermenter for ethanol production using <I>Z. mobilis</I> was built to identify the Hopf bifurcation (HB) points, which indicate the oscillatory behavior, using the inlet substrate concentration and the dilution rate as bifurcation parameters. The path of the HB points can be determined with different controlling operating parameters. It was found that with the addition of a small amount of cells or ethanol to the feed stream or by increasing the dilution rate, the oscillations could be eliminated and steady‐state behavior was attained. Using a two‐parameter continuation strategy, the <I>Z. mobilis</I> fermentation system could operate at steady state without oscillatory behavior.</P>