experiments were terminated when gas production was observed
less than 500 mL per day.
After the anaerobic fermentation of the experiments described
above, three of 5 L glass bottles with working volume of 4 L with
the selected biogas production ratio were performed for biogas
production and preparing biogas residue for BSFL. The anaerobic
fermentation conditions were the same as above experiments.
The biogas residues from the bottles were dried at 105 C until
the weight kept the same.