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Volatile Fatty Acid Production from Food Waste Leachate Using Enriched Bacterial Culture and Soil Bacteria as Co-Digester

Author

Listed:
  • Van Hong Thi Pham

    (Department of Environmental Energy Engineering, Graduate School of Kyonggi University, Suwon 16227, Korea)

  • Jeongyoon Ahn

    (Department of Environmental Energy Engineering, Graduate School of Kyonggi University, Suwon 16227, Korea)

  • Jaisoo Kim

    (Department of Life Science, College of Natural Science of Kyonggi University, Suwon 16227, Korea)

  • Sangbeom Lee

    (National Institute of Crop Science, Rural Development Administration, Wanju 55365, Korea)

  • Ingyu Lee

    (Department of Environmental Engineering, University of Seoul, Seoul 02504, Korea)

  • Sungchul Kim

    (Department of Environmental Energy Engineering, College of Creative Engineering of Kyonggi University, Suwon 16227, Korea)

  • Soonwoong Chang

    (Department of Environmental Energy Engineering, College of Creative Engineering of Kyonggi University, Suwon 16227, Korea)

  • Woojin Chung

    (Department of Environmental Energy Engineering, College of Creative Engineering of Kyonggi University, Suwon 16227, Korea)

Abstract

The production of volatile fatty acids (VFAs) from waste stream has been recently getting attention as a cost-effective and environmentally friendly approach in mechanical–biological treatment plants. This is the first study to explore the use of a functional bacterium, AM5 isolated from forest soil, which is capable of enhancing the production of VFAs in the presence of soil bacteria as a co-digester in non-strict anaerobic fermentation processes of food waste leachates. Batch laboratory-scale trials were conducted under thermophilic conditions at 55 °C and different pH values ranging from approximately 5 to 11, as well as under uncontrolled pH for 15 days. Total solid content (TS) and volatile solid content (VS) were observed with 58.42% and 65.17% removal, respectively. An effluent with a VFA concentration of up to 33,849 mg/L (2365.57 mg/g VS; 2244.45 mg/g chemical oxygen demand (COD)-VFA VS; 1249 mg/g VS removed ) was obtained at pH 10.5 on the second day of the batch culture. The pH resulted in a significant effect on VFA concentration and composition at various values. Additionally, all types of VFAs were produced under pH no-adjustment (approximately 5) and at pH 10.5. This research might lead to interesting questions and ideas for further studies on the complex metabolic pathways of microbial communities in the mixture of a soil solution and food waste leachate.

Suggested Citation

  • Van Hong Thi Pham & Jeongyoon Ahn & Jaisoo Kim & Sangbeom Lee & Ingyu Lee & Sungchul Kim & Soonwoong Chang & Woojin Chung, 2021. "Volatile Fatty Acid Production from Food Waste Leachate Using Enriched Bacterial Culture and Soil Bacteria as Co-Digester," Sustainability, MDPI, vol. 13(17), pages 1-14, August.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:17:p:9606-:d:622471
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    References listed on IDEAS

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    1. Jiaqi Hou & Mingxiao Li & Xuhui Mao & Yan Hao & Jie Ding & Dongming Liu & Beidou Xi & Hongliang Liu, 2017. "Response of microbial community of organic-matter-impoverished arable soil to long-term application of soil conditioner derived from dynamic rapid fermentation of food waste," PLOS ONE, Public Library of Science, vol. 12(4), pages 1-15, April.
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    Cited by:

    1. Yongping Li & Jiaoning Zhu & Yun Tang & Xiangyuan Shi & Sumera Anwar & Juanling Wang & Li Gao & Jingxuan Zhang, 2023. "Impact of Varying Mass Concentrations of Ammonia Nitrogen on Biogas Production and System Stability of Anaerobic Fermentation," Agriculture, MDPI, vol. 13(8), pages 1-14, August.

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