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Table 3 Comparison of butyric acid production from different substrates by C. tyrobutyricum

From: Production of butyric acid from acid hydrolysate of corn husk in fermentation by Clostridium tyrobutyricum: kinetics and process economic analysis

Substrate Hydrolysis method Fermentation mode Titer (g L−1) Yield (g g−1) Productivity (g L−1 h−1) References
Lignocellulosic biomass 0.04 M HCl/0.01–0.02 M H2SO4, 121 °C, 30 min, cellulases, 50 °C, 72 h Batch in serum bottles 42.6 0.36 0.56 [20]
Sorghum stalk and beet molasses 50 mM citrate buffer, cellulases, 50 °C, 18 h Batch in bioreactors 58.8 0.52 1.9 [42]
Wheat straw 1.4% H2SO4, 163 °C, 15 min, cellulases, 120 h Batch in serum vials 20.0 0.33 0.21 [22]
SCB 0.1 M HCl, 121 °C, 10–15 min, cellulases, 50 °C, 24 h Fed-batch in FBB 20.9 0.48 0.5 [25]
JA 0.01 M H2SO4, 121 °C, 30 min Fed-batch in FBB 60.4 0.38 1.1 [18]
Repeated-batch in FBB 27.5 0.44 2.75
Brown algae 1.5% H2SO4, 121 °C, 1 h Fed-batch in FBB 11.0 0.11 0.9 [19]
Cane molasses 5 M H2SO4, 60 °C, 2 h Fed-batch in FBB 55.2 0.46 3.2 [16]
Corn meal 0.6% amylase, 60 °C Fed-batch in FBB 46.0 0.45 6.8 [17]
Corn fibre 0.25 M HCl, 121 °C, 45 min Fed-batch in FBB 29.0 0.47 2.9 [23]
Corn husk 0.4 M H2SO4, 110 °C, 6 h Repeated batch in FBB 20.8 0.39 0.42 This study
  1. FBB fibrous bed bioreactor, JA Jerusalem artichoke, SCB sugarcane bagasse