Co-fermentation of residual algal biomass and glucose under the influence of Fe3O4 nanoparticles to enhance biohydrogen production under dark mode

Neha Srivastava, Manish Srivastava, Rajeev Singh, Asad Syed, Dan Bahadur Pal, Abdallah M. Elgorban, Deepika Kushwaha, P. K. Mishra, Vijai Kumar Gupta*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The present study reports Fe3O4 nanoparticles (Fe3O4 NPs) induced enhanced hydrogen production via co-fermentation of glucose and residual algal biomass (cyanobacteria Lyngbya limnetica). A significant enhancement of dark fermentative H2 production has been noticed under the influence of co-fermentation of glucose and residual algal biomass using Fe3O4 NPs as catalyst. Further, using the optimized ratio of glucose to residual algal biomass (10:4), ∼ 37.14 % higher cumulative H2 has been recorded in presence of 7.5 mg/L Fe3O4 NPs as compared to control at 37 °C. In addition, under the optimum conditions [glucose to residual algal biomass ratio (10:4)] presence of 7.5 mg/L Fe3O4 NPs produces ∼ 937 mL/L cumulative H2 in 168 h at pH 7.5 and at temperature 40 °C. Clostridum butyrium, employed for the dark fermentation yielded ∼ 7.7 g/L dry biomass in 168 h whereas acetate (9.0 g/L) and butyrate (6.2 g/L) have been recorded as the dominating metabolites.

Original languageEnglish
Article number126034
JournalBioresource Technology
Volume342
Early online date27 Sep 2021
DOIs
Publication statusPrint publication - Dec 2021

Keywords

  • Biohydrogen
  • Cyanobacteria
  • Dark fermentation
  • Microbial enzymes
  • Nanoparticle

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