Influence of iron on sulfide inhibition in dark biohydrogen fermentation.
Sulfide impact on biohydrogen production using dark fermentation of glucose at 37 °C was investigated. Dissolved sulfide (S(2-)) at a low concentration (25mg/L) increased biohydrogen production by 54% relative to the control (without iron addition). Whereas on initial dissolved S(2-) concentration of 500 mg/L significantly inhibited the biohydrogen production with total cumulative biohydrogen decreasing by 90% compared to the control (without iron addition). At sulfide concentrations of 500 mg S(2-)/L, addition of Fe(2+) at 3-4 times the theoretical requirement to precipitate 100% of the dissolved S(2-) entirely eliminated the inhibitory effect of sulfide.
Civil and Environmental Engineering, University of Waterloo, Waterloo, ON, Canada N2L 3G1.
Bipro Ranjan
BR
Dhar
Elsayed
E
Elbeshbishy
George
G
Nakhla
D061249:Batch Cell Culture Techniques; D056804:Biofuels / Q000032:analysis*; D057919:Biological Oxygen Demand Analysis; D005232:Fatty Acids, Volatile / Q000096:biosynthesis; D005285:Fermentation / Q000187:drug effects*; D006859:Hydrogen / Q000378:metabolism*; D007501:Iron / Q000494:pharmacology*; D007700:Kinetics; D013440:Sulfides / Q000494:pharmacology*; D013997:Time Factors
D056804:Biofuels; D005232:Fatty Acids, Volatile; D013440:Sulfides; D006859:Hydrogen; D007501:Iron