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

Jeongdong Choi and Youngho Ahn
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Jeongdong Choi: Department of Environmental Engineering, Korea National University of Transportation, Chungju 380-702, Korea
Youngho Ahn: Department of Civil Engineering, Yeungnam University, Gyeongsan 712-749, Korea

Energies, 2015, vol. 8, issue 3, 1-14

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 CaCO 3 /L) showed no biogas production or propionate/acetate accumulation. The maximum hydrogen production rate (0.32 L H 2 /g volatile suspended solids (VSS)-d) was observed at pH 8.95 and 3.18 g CaCO 3 /L. BA greater than 4 g CaCO 3 /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.

Keywords: bicarbonate alkalinity; biohydrogen fermentation; sucrose; piggery waste; pH; homoacetogenesis (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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