Hydrogen production from continuous flow, microbial reverse-electrodialysis electrolysis cells treating fermentation wastewater

Valerie J. Watson; Marta Hatzell; Bruce E. Logan

doi:10.1016/j.biortech.2015.05.088

Hydrogen production from continuous flow, microbial reverse-electrodialysis electrolysis cells treating fermentation wastewater

Valerie J. Watson, Marta Hatzell, Bruce E. Logan

Research output: Contribution to journal › Article › peer-review

51 Scopus citations

Abstract

A microbial reverse-electrodialysis electrolysis cell (MREC) was used to produce hydrogen gas from fermentation wastewater without the need for additional electrical energy. Increasing the number of cell pairs in the reverse electrodialysis stack from 5 to 10 doubled the maximum current produced from 60 A/m³ to 120 A/m³ using acetate. However, more rapid COD removal required a decrease in the anolyte hydraulic retention time (HRT) from 24 to 12 h to stabilize anode potentials. Hydrogen production using a fermentation wastewater (10 cell pairs, HRT = 8 h) reached 0.9 ± 0.1 L H₂/L_reactor/d (1.1 ± 0.1 L H₂/g-COD), with 58 ± 5% COD removal and a coulombic efficiency of 74 ± 5%. These results demonstrated that consistent rates of hydrogen gas production could be achieved using an MREC if effluent anolyte COD concentrations are sufficient to produce stable anode potentials.

Original language	English (US)
Pages (from-to)	51-56
Number of pages	6
Journal	Bioresource technology
Volume	195
DOIs	https://doi.org/10.1016/j.biortech.2015.05.088
State	Published - Aug 15 2015

All Science Journal Classification (ASJC) codes

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.biortech.2015.05.088

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title = "Hydrogen production from continuous flow, microbial reverse-electrodialysis electrolysis cells treating fermentation wastewater",

abstract = "A microbial reverse-electrodialysis electrolysis cell (MREC) was used to produce hydrogen gas from fermentation wastewater without the need for additional electrical energy. Increasing the number of cell pairs in the reverse electrodialysis stack from 5 to 10 doubled the maximum current produced from 60 A/m3 to 120 A/m3 using acetate. However, more rapid COD removal required a decrease in the anolyte hydraulic retention time (HRT) from 24 to 12 h to stabilize anode potentials. Hydrogen production using a fermentation wastewater (10 cell pairs, HRT = 8 h) reached 0.9 ± 0.1 L H2/Lreactor/d (1.1 ± 0.1 L H2/g-COD), with 58 ± 5% COD removal and a coulombic efficiency of 74 ± 5%. These results demonstrated that consistent rates of hydrogen gas production could be achieved using an MREC if effluent anolyte COD concentrations are sufficient to produce stable anode potentials.",

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AU - Watson, Valerie J.

AU - Hatzell, Marta

AU - Logan, Bruce E.

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N2 - A microbial reverse-electrodialysis electrolysis cell (MREC) was used to produce hydrogen gas from fermentation wastewater without the need for additional electrical energy. Increasing the number of cell pairs in the reverse electrodialysis stack from 5 to 10 doubled the maximum current produced from 60 A/m3 to 120 A/m3 using acetate. However, more rapid COD removal required a decrease in the anolyte hydraulic retention time (HRT) from 24 to 12 h to stabilize anode potentials. Hydrogen production using a fermentation wastewater (10 cell pairs, HRT = 8 h) reached 0.9 ± 0.1 L H2/Lreactor/d (1.1 ± 0.1 L H2/g-COD), with 58 ± 5% COD removal and a coulombic efficiency of 74 ± 5%. These results demonstrated that consistent rates of hydrogen gas production could be achieved using an MREC if effluent anolyte COD concentrations are sufficient to produce stable anode potentials.

AB - A microbial reverse-electrodialysis electrolysis cell (MREC) was used to produce hydrogen gas from fermentation wastewater without the need for additional electrical energy. Increasing the number of cell pairs in the reverse electrodialysis stack from 5 to 10 doubled the maximum current produced from 60 A/m3 to 120 A/m3 using acetate. However, more rapid COD removal required a decrease in the anolyte hydraulic retention time (HRT) from 24 to 12 h to stabilize anode potentials. Hydrogen production using a fermentation wastewater (10 cell pairs, HRT = 8 h) reached 0.9 ± 0.1 L H2/Lreactor/d (1.1 ± 0.1 L H2/g-COD), with 58 ± 5% COD removal and a coulombic efficiency of 74 ± 5%. These results demonstrated that consistent rates of hydrogen gas production could be achieved using an MREC if effluent anolyte COD concentrations are sufficient to produce stable anode potentials.

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Hydrogen production from continuous flow, microbial reverse-electrodialysis electrolysis cells treating fermentation wastewater

Abstract

All Science Journal Classification (ASJC) codes

UN SDGs

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