Hydrogen production from sulfate- and ferrous-enriched wastewater |
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| Authors: | Jae-Hoon Hwang Jeong-A. Choi You-Kwan Oh Reda A.I. Abou-Shanab Hocheol Song Booki Min Yunchul Cho Jeong-Geol Na Jakon Koo Byong-Hun Jeon |
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| Affiliation: | aDept. of Environmental Engineering, Yonsei University, Wonju, Gangwon-do 220-710, South Korea;bBioenergy Center, Korea Institute of Energy Research, Daejeon 305-343, South Korea;cDept. of Environmental Biotechnology, Mubarak City for Scientific Research and Technology Applications, 21934 Alexandria, Egypt;dDept. of Environment and Energy, Sejong University, Gwangjin-gu, Seoul 143-747, South Korea;eDept. of Environmental Science and Engineering, Kyung Hee University, Yongin-Si, Gyeonggi-Do 446-701, South Korea;fGraduate School of Green Environment and Energy, Kwangwoon University, Seoul 139-701, South Korea |
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| Abstract: | The quantitative relationship between sulfate reducing bacteria (SRB) and hydrogen (H2) production from sulfate (SO42−) and ferrous [Fe(II)] enriched wastewater was investigated. Both Fe(II) (0–11,600 mg/L) and SO42− (0–20,000 mg/L) improved the H2 production efficiency from wastewater. The H2 yields were increased up to 1.9 mol H2/mol glucose in 580–1750 mg Fe(II)/L and 1000–3000 mg SO42−/L enriched wastewater at pH 5.8–6.2. Quantitative Fluorescence In Situ Hybridization (FISH) analyses revealed that the specific sulfate reducing activities (SSRA) were increased from 0.08 and 0.06 to 0.16 and 0.21 g TS/g SRB h in response to variations in sulfate concentration from 300–20,000 mg/L at pH 5.8 and 6.2, respectively. H2 production was not influenced by low SSRA (≤0.1 g TS/g SRB h), which was independent of pH variation. The results demonstrated that the SSRA and Fe(II) concentration can significantly influence on the biological H2 production from SO42− and Fe(II) containing wastewater. |
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| Keywords: | Biohydrogen Quantitative SRB SO42&minus Fe(II) pH |
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