H(2) synthesis from pentoses and biomass in Thermotoga spp.
We have investigated H(2) production on glucose, xylose, arabinose, and glycerol in Thermotoga maritima and T. neapolitana. Both species metabolised all sugars with hydrogen yields of 2.7-3.8 mol mol(-1) sugar. Both pentoses were at least comparable to glucose with respect to their qualities as substrates for hydrogen production, while glycerol was not metabolised by either species. Glycerol was also not metabolised by T. elfii. We also demonstrated that T. neapolitana can use wet oxidised wheat straws, in which most sugars are stored in glycoside polymers, for growth and efficient hydrogen production, while glucose, xylose and arabinose are consumed in parallel.
Department of Biotechnology, Chemistry and Environmental Engineering, Aalborg University, Sohngaardsholmsvej 49, 9000 Aalborg, Denmark. nte@bio.aau.dk
Niels T
NT
Eriksen
Martin Leegaard
ML
Riis
Nikolaj Kyndby
NK
Holm
Niels
N
Iversen
D001089:Arabinose / Q000378:metabolism; D018533:Biomass; D005947:Glucose / Q000378:metabolism; D005990:Glycerol / Q000378:metabolism; D006859:Hydrogen / Q000378:metabolism*; D010429:Pentoses / Q000378:metabolism*; D020124:Thermotoga maritima / Q000378:metabolism*; D046949:Thermotoga neapolitana / Q000378:metabolism*; D014994:Xylose / Q000378:metabolism
D010429:Pentoses; D006859:Hydrogen; D014994:Xylose; D001089:Arabinose; D005947:Glucose; D005990:Glycerol