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Effect of inoculum concentration, pH, light intensity and lighting regime on hydrogen production by phototrophic microbial consortium

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  • Lazaro, Carolina Zampol
  • Varesche, Maria Bernadete Amâncio
  • Silva, Edson Luiz

Abstract

Photobiological hydrogen production using a bacterial consortium has advantages over pure cultures regarding application to wastewater treatment. Photo-H2 production from organic acids, which were produced by dark fermentation, must be studied in detail to make a hydrogen production process in two stages efficient. In this scenario, our study aimed to determine the optimized culture conditions for hydrogen production by a phototrophic bacterial consortium. The inoculum concentration, pH, light intensity and illumination protocols were the parameters that we evaluated. The optimal conditions for hydrogen production were inoculum concentration of 0.2 g VSS L−1, pH 7.0, light intensity of 5 klux, with a constant illumination regime. The highest hydrogen production potential (P) and substrate conversion efficiency (SCE) were 41.5 mmol H2 L−1 culture and 25.4%, respectively, with a COD removal of 95%.

Suggested Citation

  • Lazaro, Carolina Zampol & Varesche, Maria Bernadete Amâncio & Silva, Edson Luiz, 2015. "Effect of inoculum concentration, pH, light intensity and lighting regime on hydrogen production by phototrophic microbial consortium," Renewable Energy, Elsevier, vol. 75(C), pages 1-7.
    • Handle: RePEc:eee:renene:v:75:y:2015:i:c:p:1-7
    DOI: 10.1016/j.renene.2014.09.034
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    References listed on IDEAS

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    1. Akroum-Amrouche, Dahbia & Abdi, Nadia & Lounici, Hakim & Mameri, Nabil, 2011. "Effect of physico-chemical parameters on biohydrogen production and growth characteristics by batch culture of Rhodobacter sphaeroides CIP 60.6," Applied Energy, Elsevier, vol. 88(6), pages 2130-2135, June.
    2. Loss, Raquel Aparecida & Fontes, Maria Luiza & Reginatto, Valéria & Antônio, Regina Vasconcellos, 2013. "Biohydrogen production by a mixed photoheterotrophic culture obtained from a Winogradsky column prepared from the sediment of a southern Brazilian lagoon," Renewable Energy, Elsevier, vol. 50(C), pages 648-654.
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    1. Niño-Navarro, C. & Chairez, I. & Christen, P. & Canul-Chan, M. & García-Peña, E.I., 2020. "Enhanced hydrogen production by a sequential dark and photo fermentation process: Effects of initial feedstock composition, dilution and microbial population," Renewable Energy, Elsevier, vol. 147(P1), pages 924-936.
    2. Rodrigues, Caroline Varella & Rios Alcaraz, Francisco Abraham & Nespeca, Maurílio Gustavo & Rodrigues, Aline Varella & Motteran, Fabrício & Tallarico Adorno, Maria Angela & Varesche, Maria Bernadete A, 2020. "Biohydrogen production in an integrated biosystem using crude glycerol from waste cooking oils," Renewable Energy, Elsevier, vol. 162(C), pages 701-711.

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