Application of an electric field for pretreatment of a seeding source for dark fermentative hydrogen production

Da Young Jeong, Si Kyung Cho, Hang Sik Shin, Kyung Won Jung

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

In present study, an electric field was newly adopted as a pretreatment method for inoculum preparation in dark fermentative hydrogen production. Various voltages (5-20V for 10min) were applied, and the feasibility and efficiency of this method were compared with those of heat pretreatment (90°C for 20min). Both the highest H2 yield, 1.43mol H2/molhexoseadded, and the highest production rate, 101.4mLH2/L/h, were observed at 10V. While RNA concentration of above 100mg/L was maintained up to 10V, it was decreased at an applied voltage of 20V, where the worst performance was observed. Microbial analysis results confirmed that only H2 producing bacteria were detected with electric pretreatment, while non-H2 producing bacteria coexist with heat and electric (5V) pretreatment. The results suggested that application of an electric field has reasonable potential as an alternative method for preparing inoculums for hydrogen production.

Original languageEnglish
Pages (from-to)393-396
Number of pages4
JournalBioresource Technology
Volume139
DOIs
StatePublished - Jul 2013

Keywords

  • Electric pretreatment
  • RNA concentration

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