Feasibility of anaerobic digestion from bioethanol fermentation residue

Jeong Hoon Park, Sang Hyoun Kim, Hee Deung Park, Dong Jung Lim, Jeong Jun Yoon

Research output: Contribution to journalArticle

13 Citations (Scopus)


The focus of this study was the reuse of red algal ethanol fermentation residue as feedstock for anaerobic digestion. Levulinic acid and formic acid, the dilute-acid hydrolysis byproducts, inhibited methanogenesis at concentrations over 3.0 and 0.5. g/L, respectively. However, the inhibition was overcome by increasing inoculum concentration. A series of batch experiments with the fermentation residue showed increased methane yield and productivity at higher inoculum concentration. The maximum methane conversion rate of 84.8% was found at 5. g COD/L of fermentation residue at 0.25. g COD/g VSS of food-to-microorganism (F/M) ratio. The red algal ethanol fermentation residue can possibly be used as a feedstock in anaerobic digestion at appropriate concentration and F/M ratio.

Original languageEnglish
Pages (from-to)177-183
Number of pages7
JournalBioresource technology
Publication statusPublished - 2013 Aug


  • Anaerobic digestion
  • Formic acid
  • Inhibition
  • Levulinic acid
  • Red algae

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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