Anaerobic digestibility of algal bioethanol residue

作者：Park Jeong Hoon; Yoon Jeong Jun; Park Hee Deung; Lim Dong Jung; Kim Sang Hyoun^*

来源：Bioresource Technology, 2012, 113: 78-82.

DOI：10.1016/j.biortech.2011.12.123

• Biogas
• Macroalgal biomass
• Saccharification
• Fermentation
• 5-Hydroxymethylfurfural (5-HMF)

The aim of this work was to investigate anaerobic digestibility of algal bioethanol residue from saccharification and fermentation processes. A series of batch anaerobic digestion tests using saccharification and fermentation residue showed that the maximum methane yields of saccharification residue and fermentation residue were 239 L/kg VS (Volatile Solids) and 283 L/kg VS (Volatile Solids), respectively. Energy recovered by anaerobic digestion of the residue was 2.24 times higher than that from the ethanol produced in the main process. 5-HMF (5-hydroxymethylfurfural), a saccharification byproduct, could retard methanogenesis at over 3 g/L however, the inhibition was prevented by increasing cell biomass concentration. Anaerobic digestion of residue has the potential to enhance bioenergy recovery and environmental sustainability of algal bioethanol production.

• 出版日期2012-6