Role of low-level alternating current and impedance for enhancing microalgae biomass and lipid production

IF 2.3 4区生物学 Q3 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

Journal of bioscience and bioengineering Pub Date : 2025-03-10 DOI:10.1016/j.jbiosc.2025.02.001

Carine Souza da Silva , Gustavo Miranda Pires Santos , Gabriele Rodrigues Conceição , Ian da Silva Andrade , Alana Nogueira Silva , Rodrigo Miranda Pires Santos , Paulo Fernando de Almeida , Fabio Alexandre Chinalia

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引用次数: 0

Abstract

Microalgae hold significant potential for producing value-added bioproducts in pharmaceutical, cosmetic, food, and biofuel industries, with a global market value estimated at US$ 11.8 billion in 2023. Innovations in culturing systems, such as electric stimulation, aim to enhance growth performance, as it can improve cellular processes, including nutrient uptake and lipid accumulation. This study investigates the effect of low alternating electrical currents (μA) on the growth and lipid production of the halotolerant microalga Dunaliella salina across varying salt concentrations (3.5 % and 8.5 % Conway medium). Applying electric stimulation at 50, 750, and 990 μA for 30 min daily over 15 days resulted in significant enhancements, particularly at 3.5 % salinity, where lipid content increased by 144 %. The findings indicate that electrical stimulation notably reduced the lag phase and increased exponential growth rates, with superior growth coefficients correlating with higher medium impedance rather than direct current levels.

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低水平交流电流和阻抗对提高微藻生物量和脂质产量的作用。

微藻在制药、化妆品、食品和生物燃料行业生产增值生物产品方面具有巨大潜力，到2023年全球市场价值估计为118亿美元。培养系统的创新，如电刺激，旨在提高生长性能，因为它可以改善细胞过程，包括营养吸收和脂质积累。本文研究了低交流电流（μA）对耐盐微藻（Dunaliella salina）在不同盐浓度（3.5%和8.5% Conway培养基）下生长和产脂的影响。在15天内，每天施加50、750和990 μA的电刺激30分钟，结果显著增强，特别是在3.5%的盐度下，脂质含量增加了144%。研究结果表明，电刺激显著减少了滞后期，增加了指数增长率，其优越的增长系数与较高的介质阻抗相关，而不是直流电水平。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of bioscience and bioengineering 生物-生物工程与应用微生物

CiteScore

5.90

自引率

3.60%

发文量

144

审稿时长

51 days

期刊介绍： The Journal of Bioscience and Bioengineering is a research journal publishing original full-length research papers, reviews, and Letters to the Editor. The Journal is devoted to the advancement and dissemination of knowledge concerning fermentation technology, biochemical engineering, food technology and microbiology.