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2 High-Efficient Anaerobic Fermentation Technology of Organic …
Fig. 2.21 Proposed metabolic pathways of biohydrogen and methane coproduction from FW during
SHPT as inferred from the metaproteomic data (Jia et al. 2017b)
to Staphylococcus and Escherichia in Stage II and assists the regulation of anaerobic glucose metabolism. Based on the radical non-redox chemistry, the substance
catalyzes the reversible transformation of CoA and pyruvate into acetyl-CoA and
formate. Afterwards, formate dehydrogenase and hydrogenase show catalyzation
effect on the oxidation of formate to CO 2 and hydrogen, and donate electrons to
a second substrate, representing another vital pathway for hydrogen production in
pyruvate metabolism. The results indicated that the protein of major subunit of formate dehydrogenase was affiliated to Methanotorris in Euryarchaeota in archaea
and Escherichia in Gammaproteobacteria in bacteria identified in Stages I and II,
separately. There was also research concluded that Escherichia coli produced hydrogen from formate based on the formate hydrogen lyase complex composing formate
dehydrogenase-H and hydrogenase 3.