Enhanced H 2 fermentation of organic waste by CO 2 sparging

Dong Hoon Kim; Hang Sik Shin; Sang Hyoun Kim

doi:10.1016/j.ijhydene.2012.03.071

Enhanced H ₂ fermentation of organic waste by CO ₂ sparging

Dong Hoon Kim, Hang Sik Shin, Sang Hyoun Kim

Department of Civil and Environmental Engineering

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

17 Citations (Scopus)

Abstract

This study aimed to improve the productivity of dark fermentative hydrogen production from organic waste. An anaerobic sequencing batch reactor was used for hydrogen fermentation and it was fed with food waste (VS 4.4 ± 0.2% containing 27 g carbohydrate-COD/L) at various CO ₂ sparging rates (40-120 L/L/d), hydraulic retention times (HRTs; 18-42 h), and solid retention times (SRTs; 18-160 h). CO ₂ sparging increased the H ₂ productivity by 5-36% at all the examined conditions, confirming the benefit of the replacement of headspace gas by CO ₂. The maximum H ₂ production was obtained by CO ₂ sparging at 80 L/L/d, resulting in the H ₂ productivity of 3.18 L H ₂/L/d and the H ₂ yield of 97.3 mL H ₂/g VS _added. Increase of n-butyrate and isopropanol yields were concurrent with the enhanced H ₂ yield by CO ₂ sparging. Acidogenic efficiency, the sum of H ₂, organic acid, and alcohol, in the CO ₂-sparged reactor ranged from 47.9 to 56.0%, which was comparable to conventional acidogenesis. Thermodynamic analysis confirmed that both CO ₂ sparging and CO ₂ removal were beneficial for H ₂-producing reactions, but CO ₂ sparing has more profound effect than CO ₂ removal on inhibiting H ₂-consuming reactions.

Original language	English
Pages (from-to)	15563-15568
Number of pages	6
Journal	International Journal of Hydrogen Energy
Volume	37
Issue number	20
DOIs	https://doi.org/10.1016/j.ijhydene.2012.03.071
Publication status	Published - 2012 Oct

Bibliographical note

Funding Information:
This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (MOST) ( 2011-0014666 ) and the Korea Science and and Engineering Foundation grant (No. M1-0203-00-0063 ).

All Science Journal Classification (ASJC) codes

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

UN SDGs

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

Access to Document

10.1016/j.ijhydene.2012.03.071

Cite this

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title = "Enhanced H 2 fermentation of organic waste by CO 2 sparging",

abstract = "This study aimed to improve the productivity of dark fermentative hydrogen production from organic waste. An anaerobic sequencing batch reactor was used for hydrogen fermentation and it was fed with food waste (VS 4.4 ± 0.2% containing 27 g carbohydrate-COD/L) at various CO 2 sparging rates (40-120 L/L/d), hydraulic retention times (HRTs; 18-42 h), and solid retention times (SRTs; 18-160 h). CO 2 sparging increased the H 2 productivity by 5-36% at all the examined conditions, confirming the benefit of the replacement of headspace gas by CO 2. The maximum H 2 production was obtained by CO 2 sparging at 80 L/L/d, resulting in the H 2 productivity of 3.18 L H 2/L/d and the H 2 yield of 97.3 mL H 2/g VS added. Increase of n-butyrate and isopropanol yields were concurrent with the enhanced H 2 yield by CO 2 sparging. Acidogenic efficiency, the sum of H 2, organic acid, and alcohol, in the CO 2-sparged reactor ranged from 47.9 to 56.0%, which was comparable to conventional acidogenesis. Thermodynamic analysis confirmed that both CO 2 sparging and CO 2 removal were beneficial for H 2-producing reactions, but CO 2 sparing has more profound effect than CO 2 removal on inhibiting H 2-consuming reactions.",

author = "Kim, {Dong Hoon} and Shin, {Hang Sik} and Kim, {Sang Hyoun}",

note = "Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (MOST) ( 2011-0014666 ) and the Korea Science and and Engineering Foundation grant (No. M1-0203-00-0063 ).",

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AU - Kim, Dong Hoon

AU - Shin, Hang Sik

AU - Kim, Sang Hyoun

N1 - Funding Information: This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (MOST) ( 2011-0014666 ) and the Korea Science and and Engineering Foundation grant (No. M1-0203-00-0063 ).

PY - 2012/10

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N2 - This study aimed to improve the productivity of dark fermentative hydrogen production from organic waste. An anaerobic sequencing batch reactor was used for hydrogen fermentation and it was fed with food waste (VS 4.4 ± 0.2% containing 27 g carbohydrate-COD/L) at various CO 2 sparging rates (40-120 L/L/d), hydraulic retention times (HRTs; 18-42 h), and solid retention times (SRTs; 18-160 h). CO 2 sparging increased the H 2 productivity by 5-36% at all the examined conditions, confirming the benefit of the replacement of headspace gas by CO 2. The maximum H 2 production was obtained by CO 2 sparging at 80 L/L/d, resulting in the H 2 productivity of 3.18 L H 2/L/d and the H 2 yield of 97.3 mL H 2/g VS added. Increase of n-butyrate and isopropanol yields were concurrent with the enhanced H 2 yield by CO 2 sparging. Acidogenic efficiency, the sum of H 2, organic acid, and alcohol, in the CO 2-sparged reactor ranged from 47.9 to 56.0%, which was comparable to conventional acidogenesis. Thermodynamic analysis confirmed that both CO 2 sparging and CO 2 removal were beneficial for H 2-producing reactions, but CO 2 sparing has more profound effect than CO 2 removal on inhibiting H 2-consuming reactions.

AB - This study aimed to improve the productivity of dark fermentative hydrogen production from organic waste. An anaerobic sequencing batch reactor was used for hydrogen fermentation and it was fed with food waste (VS 4.4 ± 0.2% containing 27 g carbohydrate-COD/L) at various CO 2 sparging rates (40-120 L/L/d), hydraulic retention times (HRTs; 18-42 h), and solid retention times (SRTs; 18-160 h). CO 2 sparging increased the H 2 productivity by 5-36% at all the examined conditions, confirming the benefit of the replacement of headspace gas by CO 2. The maximum H 2 production was obtained by CO 2 sparging at 80 L/L/d, resulting in the H 2 productivity of 3.18 L H 2/L/d and the H 2 yield of 97.3 mL H 2/g VS added. Increase of n-butyrate and isopropanol yields were concurrent with the enhanced H 2 yield by CO 2 sparging. Acidogenic efficiency, the sum of H 2, organic acid, and alcohol, in the CO 2-sparged reactor ranged from 47.9 to 56.0%, which was comparable to conventional acidogenesis. Thermodynamic analysis confirmed that both CO 2 sparging and CO 2 removal were beneficial for H 2-producing reactions, but CO 2 sparing has more profound effect than CO 2 removal on inhibiting H 2-consuming reactions.

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