Co-digestion of untreated macro and microalgal biomass for biohydrogen production: Impact of inoculum augmentation and microbial insights

Periyasamy Sivagurunathan, Gopalakrishnan Kumar, Takuro Kobayashi, Kaiqin Xu, Sang Hyoun Kim, Dinh Duc Nguyen, Soon Woong Chang

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This study assessed the co-digestion of macro and microalgal biomass towards the improvement of hydrogen production. The red macroalgal biomass (Gelidium amansii) and green mixed microalgal biomass was mixed in a ratio of 8:2, with an initial substrate concentration of 10 g/L, and various amount of inoculum addition range from 3 to 15% (v/v) was evaluated to assess the feasible substrate to inoculum ratio for the effective co-digestion of the algal biomass. The results showed that the co-digestion with 6% inoculum addition provided the peak hydrogen yield of 45 mL/g dry biomass added with a high hydrogen content of 24% in the gas phase. The other tested conditions showed moderate hydrogen content in the range of 17–22%, respectively. These results suggest that anaerobic co-digestion of macro and microalgal biomass, with appropriate initial biomass loading (6%) is essential for enhanced hydrogen production.

Original languageEnglish
Pages (from-to)11484-11492
Number of pages9
JournalInternational Journal of Hydrogen Energy
Volume43
Issue number25
DOIs
Publication statusPublished - 2018 Jun 21

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

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