Effect of Organic Acid on the Alcohol Fermentation Process Coupling with Biogas Fermentation

Abstract:

Recycling the stilliage condensates produced into the fermentation phase,coupled with the alcohol fermentation and the anaerobic biogas fermentation.It has been demonstrated that acetic acid and propionic acid exhibited main inhibition effect on the alcohol fermentation.The concentration of acetic acid inhibit alcohol fermentation was 0.4 g/dL and that of propionic acid was 0.1 g/dL.When the lactic acid concentration increase to 2.5 g/dL,a inhibition effect on alcohol process was detected.