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L-(+)-Lactic Acid from Reed: Comparing Various Resources for the Nutrient Provision of B. coagulans

Author

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  • Linda Schroedter

    (Bioengineering Department, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Max-Eyth-Allee 100, 14469 Potsdam, Germany)

  • Roland Schneider

    (Bioengineering Department, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Max-Eyth-Allee 100, 14469 Potsdam, Germany)

  • Lisa Remus

    (Institute for Biochemistry and Biology (IBB), Faculty of Science, University of Potsdam (UP), Am Neuen Palais 10, 14469 Potsdam, Germany)

  • Joachim Venus

    (Bioengineering Department, Leibniz Institute for Agricultural Engineering and Bioeconomy (ATB), Max-Eyth-Allee 100, 14469 Potsdam, Germany)

Abstract

Biotechnological production of lactic acid (LA) is based on the so-called first generation feedstocks, meaning sugars derived from food and feed crops such as corn, sugarcane and cassava. The aim of this study was to exploit the potential of a second generation resource: Common reed ( Phragmites australis ) is a powerfully reproducing sweet grass which grows in wetlands and creates vast monocultural populations. This lignocellulose biomass bears the possibility to be refined to value-added products, without competing with agro industrial land. Besides utilizing reed as a renewable and inexpensive substrate, low-cost nutritional supplementation was analyzed for the fermentation of thermophilic Bacillus coagulans. Various nutritional sources such as baker’s and brewer’s yeast, lucerne green juice and tryptone were investigated for the replacement of yeast extract. The structure of the lignocellulosic material was tackled by chemical treatment (1% NaOH) and enzymatic hydrolysis (Cellic ® CTec2). B. coagulans DSM ID 14-300 was employed for the homofermentative conversion of the released hexose and pentose sugars to polymerizable L-(+)-LA of over 99.5% optical purity. The addition of autolyzed baker’s yeast led to the best results of fermentation, enabling an LA titer of 28.3 g L −1 and a yield of 91.6%.

Suggested Citation

  • Linda Schroedter & Roland Schneider & Lisa Remus & Joachim Venus, 2020. "L-(+)-Lactic Acid from Reed: Comparing Various Resources for the Nutrient Provision of B. coagulans," Resources, MDPI, vol. 9(7), pages 1-13, July.
    • Handle: RePEc:gam:jresou:v:9:y:2020:i:7:p:89-:d:387188
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    References listed on IDEAS

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    1. Azim Baibagyssov & Niels Thevs & Sabir Nurtazin & Rainer Waldhardt & Volker Beckmann & Ruslan Salmurzauly, 2020. "Biomass Resources of Phragmites australis in Kazakhstan: Historical Developments, Utilization, and Prospects," Resources, MDPI, vol. 9(6), pages 1-25, June.
    2. Franco Cotana & Gianluca Cavalaglio & Anna Laura Pisello & Mattia Gelosia & David Ingles & Enrico Pompili, 2015. "Sustainable Ethanol Production from Common Reed ( Phragmites australis ) through Simultaneuos Saccharification and Fermentation," Sustainability, MDPI, vol. 7(9), pages 1-15, September.
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