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 journalArticlepeer-review

    17 Citations (Scopus)

    Abstract

    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
    Volume141
    DOIs
    Publication statusPublished - 2013 Aug

    Bibliographical note

    Funding Information:
    This work was supported by a Grant ( 09-FN-1-0014 ) from Korea Institute of Energy Technology Evaluation and Planning, Ministry of Knowledge Economy , Republic of Korea and a Grant ( JA-12-0001 ) from Korea Institute of Industrial Technology , Republic of Korea, and Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (MOST) (2011-0014666).

    Keywords

    • 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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