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Advanced Bioethanol Production from Source-Separated Bio-waste in Pilot Scale

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  • Panagiota Tsafara

    (Unit of Environmental Science & Technology, School of Chemical Engineering, Zographou Campus, National Technical University of Athens, 9 Iroon Polytechniou Str., 15780 Athens, Greece)

  • Konstantinos Passadis

    (Unit of Environmental Science & Technology, School of Chemical Engineering, Zographou Campus, National Technical University of Athens, 9 Iroon Polytechniou Str., 15780 Athens, Greece)

  • Diogenis Christianides

    (Unit of Environmental Science & Technology, School of Chemical Engineering, Zographou Campus, National Technical University of Athens, 9 Iroon Polytechniou Str., 15780 Athens, Greece)

  • Emmanouil Chatziangelakis

    (Unit of Environmental Science & Technology, School of Chemical Engineering, Zographou Campus, National Technical University of Athens, 9 Iroon Polytechniou Str., 15780 Athens, Greece)

  • Ioannis Bousoulas

    (Unit of Environmental Science & Technology, School of Chemical Engineering, Zographou Campus, National Technical University of Athens, 9 Iroon Polytechniou Str., 15780 Athens, Greece)

  • Dimitris Malamis

    (Unit of Environmental Science & Technology, School of Chemical Engineering, Zographou Campus, National Technical University of Athens, 9 Iroon Polytechniou Str., 15780 Athens, Greece)

  • Sofia Mai

    (Unit of Environmental Science & Technology, School of Chemical Engineering, Zographou Campus, National Technical University of Athens, 9 Iroon Polytechniou Str., 15780 Athens, Greece)

  • Elli Maria Barampouti

    (Unit of Environmental Science & Technology, School of Chemical Engineering, Zographou Campus, National Technical University of Athens, 9 Iroon Polytechniou Str., 15780 Athens, Greece)

  • Konstantinos Moustakas

    (Unit of Environmental Science & Technology, School of Chemical Engineering, Zographou Campus, National Technical University of Athens, 9 Iroon Polytechniou Str., 15780 Athens, Greece)

Abstract

The Sustainable Development Goals along with national policies pave the way to a sustainable, circular, and resource efficient development model. The environmental scenario could change with the promotion of biofuels such as bioethanol. Recent research on bioethanol aspires to reduce the costs production, via the optimization of process variables and the increase in ethanol yields. This study presented a stepwise upscaling of bioethanol production from dried source-separated municipal biowaste. Three different scales (250 mL, 4 L, 100 L) were examined applying advanced ethanol production via simultaneous saccharification and fermentation. The bioprocess runs at each of the three scales and produced very similar ethanol yields, indicating excellent scalability. The validated optimum conditions at the pilot scale were 25% solids loading, Spirizyme 40 μL/g starch, NS87014 175 μL/g cellulose, and 2% S. cerevisiae . The results from the pilot trials were very successful and repeatable. Τhe mean ethanol yield was 86.60 ± 4.91%, while the structural component such as starch and cellulose were efficiently hydrolysed. The produced ethanol was recovered and purified meeting the standards of absolute ethanol, rendering it suitable for industrial uses and for biofuel use as well. Energy consumption aspects were discussed as well. Conclusively, all the stages of the value chain for source-separated biowaste valorisation (collection, treatment, added value product recovery) were successfully showcased.

Suggested Citation

  • Panagiota Tsafara & Konstantinos Passadis & Diogenis Christianides & Emmanouil Chatziangelakis & Ioannis Bousoulas & Dimitris Malamis & Sofia Mai & Elli Maria Barampouti & Konstantinos Moustakas, 2022. "Advanced Bioethanol Production from Source-Separated Bio-waste in Pilot Scale," Sustainability, MDPI, vol. 14(19), pages 1-18, September.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:19:p:12127-:d:924729
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    References listed on IDEAS

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    1. Barampouti, E.M. & Mai, S. & Malamis, D. & Moustakas, K. & Loizidou, M., 2019. "Liquid biofuels from the organic fraction of municipal solid waste: A review," Renewable and Sustainable Energy Reviews, Elsevier, vol. 110(C), pages 298-314.
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