Hydrogen production with effluent from an ethanol-H2-coproducing fermentation reactor using a single-chamber microbial electrolysis cell

Lu Lu, Nanqi Ren, Defeng Xing, Bruce Ernest Logan

Research output: Contribution to journalArticle

103 Citations (Scopus)

Abstract

Hydrogen can be produced by bacterial fermentation of sugars, but substrate conversion to hydrogen is incomplete. Using a single-chamber microbial electrolysis cell (MEC), we show that additional hydrogen can be produced from the effluent of an ethanol-type dark-fermentation reactor. An overall hydrogen recovery of 83 ± 4% was obtained using a buffered effluent (pH 6.7-7.0), with a hydrogen production rate of 1.41 ± 0.08 m3 H2/m3 reactor/d, at an applied voltage of Eap = 0.6 V. When the MEC was combined with the fermentation system, the overall hydrogen recovery was 96%, with a production rate of 2.11 m3 H2/m3/d, corresponding to an electrical energy efficiency of 287%. High cathodic hydrogen recoveries (70 ± 5% to 94 ± 4%) were obtained at applied voltages of 0.5-0.8 V due to shorter cycle times, and repression of methanogen growth through exposure of the cathode to air after each cycle. Addition of a buffer to the fermentation effluent was critical to MEC performance as there was little hydrogen production using unbuffered effluent (0.0372 m3 H2/m3/d at Eap = 0.6 V, pH 4.5-4.6). These results demonstrate that hydrogen yields from fermentation can be substantially increased by using MECs.

Original languageEnglish (US)
Pages (from-to)3055-3060
Number of pages6
JournalBiosensors and Bioelectronics
Volume24
Issue number10
DOIs
StatePublished - Jun 15 2009

Fingerprint

Regenerative fuel cells
Electrolysis
Hydrogen production
Fermentation
Effluents
Hydrogen
Ethanol
Recovery
Methanogens
Electric potential
Sugars
Energy efficiency
Buffers
Cathodes
Electrodes
Air

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biophysics
  • Biomedical Engineering
  • Electrochemistry

Cite this

@article{7e3568ee7e534a19b9a754a2cb3212c8,
title = "Hydrogen production with effluent from an ethanol-H2-coproducing fermentation reactor using a single-chamber microbial electrolysis cell",
abstract = "Hydrogen can be produced by bacterial fermentation of sugars, but substrate conversion to hydrogen is incomplete. Using a single-chamber microbial electrolysis cell (MEC), we show that additional hydrogen can be produced from the effluent of an ethanol-type dark-fermentation reactor. An overall hydrogen recovery of 83 ± 4{\%} was obtained using a buffered effluent (pH 6.7-7.0), with a hydrogen production rate of 1.41 ± 0.08 m3 H2/m3 reactor/d, at an applied voltage of Eap = 0.6 V. When the MEC was combined with the fermentation system, the overall hydrogen recovery was 96{\%}, with a production rate of 2.11 m3 H2/m3/d, corresponding to an electrical energy efficiency of 287{\%}. High cathodic hydrogen recoveries (70 ± 5{\%} to 94 ± 4{\%}) were obtained at applied voltages of 0.5-0.8 V due to shorter cycle times, and repression of methanogen growth through exposure of the cathode to air after each cycle. Addition of a buffer to the fermentation effluent was critical to MEC performance as there was little hydrogen production using unbuffered effluent (0.0372 m3 H2/m3/d at Eap = 0.6 V, pH 4.5-4.6). These results demonstrate that hydrogen yields from fermentation can be substantially increased by using MECs.",
author = "Lu Lu and Nanqi Ren and Defeng Xing and Logan, {Bruce Ernest}",
year = "2009",
month = "6",
day = "15",
doi = "10.1016/j.bios.2009.03.024",
language = "English (US)",
volume = "24",
pages = "3055--3060",
journal = "Biosensors and Bioelectronics",
issn = "0956-5663",
publisher = "Elsevier Ltd",
number = "10",

}

Hydrogen production with effluent from an ethanol-H2-coproducing fermentation reactor using a single-chamber microbial electrolysis cell. / Lu, Lu; Ren, Nanqi; Xing, Defeng; Logan, Bruce Ernest.

In: Biosensors and Bioelectronics, Vol. 24, No. 10, 15.06.2009, p. 3055-3060.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Hydrogen production with effluent from an ethanol-H2-coproducing fermentation reactor using a single-chamber microbial electrolysis cell

AU - Lu, Lu

AU - Ren, Nanqi

AU - Xing, Defeng

AU - Logan, Bruce Ernest

PY - 2009/6/15

Y1 - 2009/6/15

N2 - Hydrogen can be produced by bacterial fermentation of sugars, but substrate conversion to hydrogen is incomplete. Using a single-chamber microbial electrolysis cell (MEC), we show that additional hydrogen can be produced from the effluent of an ethanol-type dark-fermentation reactor. An overall hydrogen recovery of 83 ± 4% was obtained using a buffered effluent (pH 6.7-7.0), with a hydrogen production rate of 1.41 ± 0.08 m3 H2/m3 reactor/d, at an applied voltage of Eap = 0.6 V. When the MEC was combined with the fermentation system, the overall hydrogen recovery was 96%, with a production rate of 2.11 m3 H2/m3/d, corresponding to an electrical energy efficiency of 287%. High cathodic hydrogen recoveries (70 ± 5% to 94 ± 4%) were obtained at applied voltages of 0.5-0.8 V due to shorter cycle times, and repression of methanogen growth through exposure of the cathode to air after each cycle. Addition of a buffer to the fermentation effluent was critical to MEC performance as there was little hydrogen production using unbuffered effluent (0.0372 m3 H2/m3/d at Eap = 0.6 V, pH 4.5-4.6). These results demonstrate that hydrogen yields from fermentation can be substantially increased by using MECs.

AB - Hydrogen can be produced by bacterial fermentation of sugars, but substrate conversion to hydrogen is incomplete. Using a single-chamber microbial electrolysis cell (MEC), we show that additional hydrogen can be produced from the effluent of an ethanol-type dark-fermentation reactor. An overall hydrogen recovery of 83 ± 4% was obtained using a buffered effluent (pH 6.7-7.0), with a hydrogen production rate of 1.41 ± 0.08 m3 H2/m3 reactor/d, at an applied voltage of Eap = 0.6 V. When the MEC was combined with the fermentation system, the overall hydrogen recovery was 96%, with a production rate of 2.11 m3 H2/m3/d, corresponding to an electrical energy efficiency of 287%. High cathodic hydrogen recoveries (70 ± 5% to 94 ± 4%) were obtained at applied voltages of 0.5-0.8 V due to shorter cycle times, and repression of methanogen growth through exposure of the cathode to air after each cycle. Addition of a buffer to the fermentation effluent was critical to MEC performance as there was little hydrogen production using unbuffered effluent (0.0372 m3 H2/m3/d at Eap = 0.6 V, pH 4.5-4.6). These results demonstrate that hydrogen yields from fermentation can be substantially increased by using MECs.

UR - http://www.scopus.com/inward/record.url?scp=67349179146&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=67349179146&partnerID=8YFLogxK

U2 - 10.1016/j.bios.2009.03.024

DO - 10.1016/j.bios.2009.03.024

M3 - Article

VL - 24

SP - 3055

EP - 3060

JO - Biosensors and Bioelectronics

JF - Biosensors and Bioelectronics

SN - 0956-5663

IS - 10

ER -