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Table 3 Fermentation end products (molar concentrations) obtained during glucose fermentation performed at fixed optimal pH values (second sequence)

From: Fermentative hydrogen production from glucose and starch using pure strains and artificial co-cultures of Clostridium spp.

Strain/ co-culture Formate (mM) Lactate (mM) Acetate (mM) Butyrate (mM) H2 yield (mol H2/ mol glucose) Biogas production rate (L biogas/ h)a
C. beijerinckii DSM 1820 1.69 −1.85 4.48 16.99 1.88 0.55
C. butyricum CWBI 1009 −0.05 2.74 11.44 17.13 2.10 0.42
C. pasteurianum DSM 525 8.66 4.17 11.24 11.39 1.19 0.90
C. felsineum DSM 794 4.29 23.42 3.08 4.49 0.88 1.14
Co-culture 1 0.21 4.73 6.20 5.73 1.71 1.50
Co-culture 2 0.74 4.18 8.95 10.76 1.62 1.10
Co-culture 3 0.93 4.57 7.25 8.46 2.12 1.46
  1. a Maximum biogas production rate.