Components Acetic acid Butyric acid (mg/l) Ethanol
Thin oil      
Initial conc. 0.0 0.0 0.0
Final conc. 4869.0 795.3 0.30
Heavy Oil      
Initial conc. 0.0 0.0 0.0
Final conc. 700.97 0.0 0.17
Table 4: VFA and ethanol production in heavy and thin oil after fermentation.