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Energies 2015, 8(3), 1716-1729; doi:10.3390/en8031716

Biohydrogen Fermentation from Sucrose and Piggery Waste with High Levels of Bicarbonate Alkalinity

1
Department of Environmental Engineering, Korea National University of Transportation, Chungju 380-702, Korea
2
Department of Civil Engineering, Yeungnam University, Gyeongsan 712-749, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Thomas E. Amidon
Received: 24 November 2014 / Revised: 15 January 2015 / Accepted: 23 January 2015 / Published: 2 March 2015
(This article belongs to the Special Issue Bioenergy and Biorefining)
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Abstract

This study examined the influence of biohydrogen fermentation under the high bicarbonate alkalinity (BA) and pH to optimize these critical parameters. When sucrose was used as a substrate, hydrogen was produced over a wide range of pH values (5–9) under no BA supplementation; however, BA affected hydrogen yield significantly under different initial pHs (5–10). The actual effect of high BA using raw piggery waste (pH 8.7 and BA 8.9 g CaCO3/L) showed no biogas production or propionate/acetate accumulation. The maximum hydrogen production rate (0.32 L H2/g volatile suspended solids (VSS)-d) was observed at pH 8.95 and 3.18 g CaCO3/L. BA greater than 4 g CaCO3/L also triggered lactate-type fermentation, leading to propionate accumulation, butyrate reduction and homoacetogenesis, potentially halting the hydrogen production rate. These results highlight that the substrate with high BA need to amend adequately to maximize hydrogen production. View Full-Text
Keywords: bicarbonate alkalinity; biohydrogen fermentation; sucrose; piggery waste; pH; homoacetogenesis bicarbonate alkalinity; biohydrogen fermentation; sucrose; piggery waste; pH; homoacetogenesis
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Choi, J.; Ahn, Y. Biohydrogen Fermentation from Sucrose and Piggery Waste with High Levels of Bicarbonate Alkalinity. Energies 2015, 8, 1716-1729.

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