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Improved Food Waste Stabilization and Valorization by Anaerobic Digestion Through Supplementation of Conductive Materials and Trace Elements

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  • A. Sinan Akturk

    (School of Engineering and Technology, Central Michigan University, Mt. Pleasant, MI 48859, USA)

  • Goksel N. Demirer

    (School of Engineering and Technology, Central Michigan University, Mt. Pleasant, MI 48859, USA
    Institute for Great Lakes Research, Central Michigan University, Mt. Pleasant, MI 48859, USA)

Abstract

The positive effects of conductive material supplementation on anaerobic digestion have been mainly investigated for single synthetic substrates, while its significance for real and complex organic wastes such as food waste has not been sufficiently investigated. This study investigated the effect of conductive material (biochar and magnetite) and trace metal supplementation on the anaerobic digestion of food waste by means of biochemical methane potential assays. The results indicated that the supplementation of biochar and trace metals improved both total biogas production and methane yields. A biochar dose of 2.0 and 5.0 g/L resulted in 11.2 ± 6.5 and 27.3 ± 9.5% increase in biogas and 8.3 ± 6.8 and 33.2 ± 2.8% increase in methane yield, respectively. Moreover, the same reactors demonstrated high food waste stabilization performance of over 80% chemical oxygen demand removal efficiency. These results indicate that biochar supplementation leads to more enhanced anaerobic digestion operation that could be through increased surface area for microbial growth and/or direct interspecies electron transfer mechanism. In turn, food waste will not only be stabilized but also valorized by anaerobic digestion at higher efficiencies that support sustainable waste management through both environmentally safe disposal and value-added generation.

Suggested Citation

  • A. Sinan Akturk & Goksel N. Demirer, 2020. "Improved Food Waste Stabilization and Valorization by Anaerobic Digestion Through Supplementation of Conductive Materials and Trace Elements," Sustainability, MDPI, vol. 12(12), pages 1-11, June.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:12:p:5222-:d:376868
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    References listed on IDEAS

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    Cited by:

    1. Addam Claes & Lucy Melchi & Sibel Uludag-Demirer & Goksel N. Demirer, 2021. "Supplementation of Carbon-Based Conductive Materials and Trace Metals to Improve Biogas Production from Apple Pomace," Sustainability, MDPI, vol. 13(17), pages 1-11, August.
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    3. Tae-Bong Kim & Jun-Hyeong Lee & Young-Man Yoon, 2024. "Residence Time Reduction in Anaerobic Reactors: Investigating the Economic Benefits of Magnetite-Induced Direct Interspecies Electron Transfer Mechanism," Energies, MDPI, vol. 17(2), pages 1-13, January.
    4. Nour El Houda Chaher & Safwat Hemidat & Qahtan Thabit & Mehrez Chakchouk & Abdallah Nassour & Moktar Hamdi & Michael Nelles, 2020. "Potential of Sustainable Concept for Handling Organic Waste in Tunisia," Sustainability, MDPI, vol. 12(19), pages 1-31, October.
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    6. Cristian Bernabé Arenas Sevillano & Marco Chiappero & Xiomar Gomez & Silvia Fiore & E. Judith Martínez, 2020. "Improving the Anaerobic Digestion of Wine-Industry Liquid Wastes: Treatment by Electro-Oxidation and Use of Biochar as an Additive," Energies, MDPI, vol. 13(22), pages 1-17, November.

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