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    Third-generation L-Lactic acid production by the microwave-assisted hydrolysis of red macroalgae Eucheuma denticulatum extract

    Access Status
    Fulltext not available
    Authors
    Tong, K.T.X.
    Tan, Inn Shi
    Foo, H.C.Y.
    Tiong, Adrian Chiong Yuh
    Lam, M.K.
    Lee, K.T.
    Date
    2021
    Type
    Journal Article
    
    Metadata
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    Citation
    Tong, K.T.X. and Tan, I.S. and Foo, H.C.Y. and Tiong, A.C.Y. and Lam, M.K. and Lee, K.T. 2021. Third-generation L-Lactic acid production by the microwave-assisted hydrolysis of red macroalgae Eucheuma denticulatum extract. Bioresource Technology. 342: 125880.
    Source Title
    Bioresource Technology
    DOI
    10.1016/j.biortech.2021.125880
    ISSN
    0960-8524
    Faculty
    Global Curtin
    School
    Office of Global Curtin
    URI
    http://hdl.handle.net/20.500.11937/97424
    Collection
    • Curtin Research Publications
    Abstract

    The development of an efficient third-generation L-lactic acid (L-LA) production process from Eucheuma denticulatum extract (EDE) was achieved in this study. Microwave-assisted dilute acid hydrolysis (MADAH) and microwave-assisted hydrothermal hydrolysis (MAHTH) were chosen as the hydrolysis of EDE for the objective of increasing galactose yield. Single-factor optimization of hydrolysis of the EDE was studied, MADAH had high performance in galactose production relative to MAHTH, in which the yield and optimal conditions for both processes were 50.7% (0.1 M H2SO4, 120 °C for 25 min) and 47.8% (0 M H2SO4,160 °C for 35 min), respectively. For fermentation, the optimal L-LA yield was achieved at the inoculum cell density of 4% (w/w) Bacillus coagulans ATCC 7050 with 89.4% and 6% (w/w) Lactobacillus acidophilus LA-14 with 87.6%. In addition, lipid-extracted Chlorella vulgaris residues (CVRs) as co-nutrient supplementation increased the relative abundance of B. coagulans ATCC 7050, thus benefiting L-LA production.

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