Ethanol production with starch-based Tetraselmis subcordiformis grown with CO 2 produced during ethanol fermentation

Shu-Ping Liao, Changhong Yao, Song Xue, Wei Zhang, F Bai

    Research output: Contribution to journalArticlepeer-review

    Abstract

    A system coupling ethanol fermentation with microalgae culture was developed, in which CO2 produced during ethanol fermentation was used as carbon source for the growth of Tetraselmis subcordiformis, a microalgae accumulating starch intracellularly. The biomass concentration about 2.0 g DCW/L was achieved within the photobioreactor for the batch culture of 7 days, and intracellular starch accumulation was about 45%. Furthermore, ultrasonic pretreatment and enzymatic hydrolysis were applied to the microalgae biomass, and 71.1% of the intracellular starch was converted into glucose that was fermented sequentially to ethanol by Saccharomyces cerevisiae with an ethanol yield of 87.6% of the theoretical value, indicating that the microalgae biomass could be an alternative feedstock for ethanol production to save grain consumption, and in the meantime mitigate the CO2 emission.

    Original languageEnglish
    Pages (from-to)1292-1298
    Number of pages7
    JournalShengwu Gongcheng Xuebao
    Volume27
    Issue number9
    Publication statusPublished - Sep 2011

    Keywords

    • Coupling system
    • Ethanol fermentation
    • Saccharomyces cerevisiae
    • Tetraselmis subcordiformis

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