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Table 4 Batch fermentative hydrogen production by E. cloacae DT-1 from Azolla filiculoides biomass

From: Aquatic plant Azolla as the universal feedstock for biofuel production

Biomass pre-treatment Hydrogen production (mmol/L) Final pH VFA Total VFA (g/L) B/A ratio Yield efficiency, (mol of H2/mol of substrate)
Acetic acid (g/L) Butyric acid (g/L)
Acid based pre-treatment 53 5.4 0.986 0.161 1.147 0.16 2.43
Enzymatic hydrolysis 34.82 5.6 0.99 0.164 1.154 0.165 2.04
  1. VFA volatile fatty acid
  2. B/A butyric acid/acetic acid