The present invention relates to the use of Thermococcus onnulis WTC155T onnurineus WTC155T, Accession No .: KCTC12414BP). (A) culturing the strain of claim 1 by supplying carbon monoxide; And (b) separating hydrogen from the culture. The strain according to the present invention increased the growth rate and hydrogen production ability even in carbon monoxide of 0.2 to 0.4 vvm as a strain adapted from high concentration of carbon monoxide.
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