Lignin and extractives derived inhibitors in the 2,3-butanediol fermentation of mannose-rich prehydrolysates

SummaryMannose, the predominant sugar in southern pine water prehydrolysates, has been fermented to 2,3-butanediol by Klebsiella pneumoniae AU-1-d3. Lignin derivatives and extractives soluble in the water prehydrolysates, however, hindered the butanediol fermentation. Treatments with sequential lime-sulfuric acid or mixed bed ion resins facilitated the butanediol fermentation of the water prehydrolysates. Fermentation inhibitors derived from southern pine lignin and extractives were identified.

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