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      Buffering action of acetate on hydrogen production by Ethanoligenens harbinense B49

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          Abstract

          The buffering effect of acetate on hydrogen production during glucose fermentation by Ethanoligenens harbinense B49 was investigated compared to phosphate, a widely used fermentative hydrogen production buffer. Specific concentrations of sodium acetate or phosphate were added to batch cultures, and the effects on hydrogen production were comparatively analyzed using a modified Gompertz model. Adding 50 mM acetate or phosphate suppressed the hydrogen production peak and slightly extended the lag phase. However, the overall hydrogen yields were 113.5 and 108.5 mmol/L, respectively, and the final pH was effectively controlled. Acetate buffered against hydrogen production more effectively than did phosphate, promoting cell growth and preventing decreased pH. At buffer concentrations 100-250 mM, the maximum hydrogen production was barely suppressed, and the lag phase extended past 7 h. Therefore, although acetate inhibits hydrogen production, using acetate as a buffer (like phosphate) effectively prevented pH drops and increased substrate consumption, enhancing hydrogen production.

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          Inhibitory effects of acetate and ethanol on biohydrogen production of Ethanoligenens harbinese B49

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            Biohydrogen as a renewable energy resource—prospects and potentials

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              Effects of carbonate and phosphate concentrations on hydrogen production using anaerobic sewage sludge microflora

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Journal
                ejb
                Electronic Journal of Biotechnology
                Electron. J. Biotechnol.
                Pontificia Universidad Católica de Valparaíso
                0717-3458
                September 2016
                : 19
                : 5
                : 2-11
                Affiliations
                [1 ] Inner Mongolia University China
                [2 ] Harbin Institute of Technology China
                Article
                S0717-34582016000500002
                10.1016/j.ejbt.2016.07.002
                99bde41b-a46e-4a6f-a1cd-5966e28688f4

                This work is licensed under a Creative Commons Attribution 4.0 International License.

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                SciELO Chile

                Self URI (journal page): http://www.scielo.cl/scielo.php?script=sci_serial&pid=0717-3458&lng=en
                Categories
                BIOTECHNOLOGY & APPLIED MICROBIOLOGY

                Biotechnology
                Acetate,Biohydrogen,Ethanoligenens harbinense phosphate,Buffering action
                Biotechnology
                Acetate, Biohydrogen, Ethanoligenens harbinense phosphate, Buffering action

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