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

Energies

Jeongdong Choi¹  Youngho Ahn² 

[1] Department of Environmental Engineering, Korea National University of Transportation, Chungju 380-702, Korea; E-Mail:;Department of Civil Engineering, Yeungnam University, Gyeongsan 712-749, Korea

关键词: bicarbonate alkalinity;    biohydrogen fermentation;    sucrose;    piggery waste;    pH;    homoacetogenesis;   

DOI  :  10.3390/en8031716

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.