Sodium inhibition of fermentative hydrogen production

Dong Hoon Kim, Sang Hyoun Kim, Hang Sik Shin

Research output: Contribution to journalArticle

61 Citations (Scopus)

Abstract

A continuous-stirred-tank reactor (CSTR) was fed with low-sodium influent containing 0.27 g of Na+/L for 70 days (Phase I), and then subjected to higher concentrations of Na+/L, i.e. 2.41 (Phase II), 5.36 (Phase III), and 10.14 g (Phase IV-1). At the quasi-steady state of each phase, biomass was sampled for an acute sodium toxicity assay. Unlike the control biomass, which exhibited a monotonic decrease of specific H2 production activity (SHPA) with increasing sodium concentration from 0.27 to 21.00 g Na+/L, the acclimated biomass maintained their activity up to 6.00 g Na+/L. Soluble microbial product analysis revealed that a sudden increase of the exterior sodium concentration changed the metabolic pathway such that it became favorable to lactate production while depressing butyrate production. Meanwhile, when the biomass was allowed for sufficient time to adapt to the chronic toxicity condition, the volumetric H2 production rate (VHPR) was maintained above 4.05 L H2/L/d at up to Phase III. However, an irrecoverable H2 production drop was observed at Phase IV-1 with a significant increase of lactate and propionate production. Although the sodium concentration decreased to 8.12 (Phase IV-2), 6.61 (Phase IV-3), and 5.36 g Na+/L (Phase V) at further operation, the performance was never recovered. A PCR-DGGE analysis revealed that lactic acid bacteria (LAB) and propionic acid bacteria (PAB) were only detected at Phases IV and V, which are not capable of producing H2.

Original languageEnglish
Pages (from-to)3295-3304
Number of pages10
JournalInternational Journal of Hydrogen Energy
Volume34
Issue number8
DOIs
Publication statusPublished - 2009 May 1

Fingerprint

hydrogen production
Hydrogen production
Sodium
sodium
biomass
Biomass
lactates
toxicity
bacteria
Toxicity
Bacteria
propionic acid
Propionic acid
quasi-steady states
lactic acid
Lactic acid
Assays
reactors
products

All Science Journal Classification (ASJC) codes

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

Cite this

Kim, Dong Hoon ; Kim, Sang Hyoun ; Shin, Hang Sik. / Sodium inhibition of fermentative hydrogen production. In: International Journal of Hydrogen Energy. 2009 ; Vol. 34, No. 8. pp. 3295-3304.
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Sodium inhibition of fermentative hydrogen production. / Kim, Dong Hoon; Kim, Sang Hyoun; Shin, Hang Sik.

In: International Journal of Hydrogen Energy, Vol. 34, No. 8, 01.05.2009, p. 3295-3304.

Research output: Contribution to journalArticle

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