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Increasing Biogas Yield from Fodder by Microbial Stimulation of Propionic Acid Synthesis in Grass Silages

Author

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  • Krystyna Zielińska

    (Department of Fermentation Technology, Prof. Wacław Dąbrowski Institute of Agricultural and Food Biotechnology-State Research Institute, Rakowiecka 36 Street, 02-532 Warsaw, Poland)

  • Agata Fabiszewska

    (Department of Chemistry, Institute of Food Sciences, Warsaw University of Life Sciences, 159 c Nowoursynowska Street, 02-787 Warsaw, Poland)

  • Katarzyna Piasecka-Jóźwiak

    (Department of Fermentation Technology, Prof. Wacław Dąbrowski Institute of Agricultural and Food Biotechnology-State Research Institute, Rakowiecka 36 Street, 02-532 Warsaw, Poland)

  • Renata Choińska

    (Department of Fermentation Technology, Prof. Wacław Dąbrowski Institute of Agricultural and Food Biotechnology-State Research Institute, Rakowiecka 36 Street, 02-532 Warsaw, Poland)

Abstract

A new direction in the use of lactic acid bacteria inoculants is their application for renewable raw materials ensiling for biogas production. The aim of the study was to demonstrate the possibility of stimulating the synthesis of propionic acid in the process of co-fermentation of selected strains of Lactobacillus buchneri and L. diolivorans as well as L. buchneri and Pediococcus acidilactici . L. buchneri KKP 2047p and P. acidilactici KKP 2065p were characterized by the special capabilities for both synthesis and metabolism of 1,2-propanediol. L. diolivorans KKP 2057p stands out for the ability to metabolize 1,2-propanediol to propionic acid. As a result of the co-fermentation a concentration of propionic acid was obtained at least 1.5 times higher in the final stage of culture in comparison to cultivating individual species of bacteria separately. The results of in vitro experiments were applied in agricultural practice, by application of two lactic acid bacteria inoculants in ensiling of grass silage and improving its suitability for biogas production. Grass silages made with the addition of the inoculant were characterized by the content of 1,2-propanediol, 1-propanol and propionic acid ensured extension of the aerobic stability from 4 to 7 days in comparison to untreated silages. It was found that the use of both inoculants resulted in an approximately 10–30% increase in biogas yield from this raw material.

Suggested Citation

  • Krystyna Zielińska & Agata Fabiszewska & Katarzyna Piasecka-Jóźwiak & Renata Choińska, 2021. "Increasing Biogas Yield from Fodder by Microbial Stimulation of Propionic Acid Synthesis in Grass Silages," Energies, MDPI, vol. 14(10), pages 1-12, May.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:10:p:2843-:d:555028
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    References listed on IDEAS

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    1. Józef Szlachta & Hubert Prask & Małgorzata Fugol & Adam Luberański, 2018. "Effect of Mechanical Pre-Treatment of the Agricultural Substrates on Yield of Biogas and Kinetics of Anaerobic Digestion," Sustainability, MDPI, vol. 10(10), pages 1-16, October.
    2. McEniry, J. & Allen, E. & Murphy, J.D. & O'Kiely, P., 2014. "Grass for biogas production: The impact of silage fermentation characteristics on methane yield in two contrasting biomethane potential test systems," Renewable Energy, Elsevier, vol. 63(C), pages 524-530.
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