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Fractionation of Anaerobic Digestion Liquid Effluents through Mechanical Treatment and Filtration

Author

Listed:
  • Themistoklis Sfetsas

    (QLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, Greece)

  • Georgia Sarikaki

    (QLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, Greece)

  • Afroditi G. Chioti

    (QLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, Greece)

  • Vassilis Tziakas

    (QLAB Private Company, Research & Development, Quality Control and Testing Services, 57008 Thessaloniki, Greece)

  • Polycarpos Falaras

    (Institute of Nanoscience and Nanotechnology, National Center of Scientific Research “Demokritos”, Agia Paraskevi, 15310 Athens, Greece)

  • George Em. Romanos

    (Institute of Nanoscience and Nanotechnology, National Center of Scientific Research “Demokritos”, Agia Paraskevi, 15310 Athens, Greece)

Abstract

Organic wastes and by-products from several activities, including food industries, farming, and animal husbandry, are a hygiene threat when aerobically decomposed. Therefore, their management is crucial for public health. In this direction, anaerobic digestion (AD) systems may be the solution by transforming waste into energy, which may decrease the environmental impact. However, their efficacy should be carefully examined. In this innovative study, we evaluated the physicochemical and microbial characteristics of liquid digestate (LD) retrieved from organic animal wastes in northern Greece using nanofiltration. Using treatment technologies, including physical (solid–liquid separation, microfiltration, and nanofiltration) and biological (anaerobic digestion), heavy metals and microbial (i.e., Salmonella spp., Escherichia coli , and Enterococcus faecalis ) concentrations were reduced and nutrients were recovered. This work sets the basis for the efficient management of liquid digestate. Our method may enable the use of treated liquid digestate for unlimited irrigation water and other industrial applications of water. Apart from the sanitation process, the recovery of nutrients for soil fertilization seems to be a more sustainable way for future agricultural practices.

Suggested Citation

  • Themistoklis Sfetsas & Georgia Sarikaki & Afroditi G. Chioti & Vassilis Tziakas & Polycarpos Falaras & George Em. Romanos, 2023. "Fractionation of Anaerobic Digestion Liquid Effluents through Mechanical Treatment and Filtration," Sustainability, MDPI, vol. 15(14), pages 1-17, July.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:14:p:11178-:d:1196431
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    References listed on IDEAS

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    1. Olga Popovic & Fabrizio Gioelli & Elio Dinuccio & Luca Rollè & Paolo Balsari, 2017. "Centrifugation of Digestate: The Effect of Chitosan on Separation Efficiency," Sustainability, MDPI, vol. 9(12), pages 1-9, December.
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