对不同源的生长和发酵性能进行评估,以提高葡萄酒酵母的乙醇生产
María Cecilia Rojo1, Paola Mónica Talia2, María Cecilia Lerena1
1Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Av. Rivadavia 1917, Ciudad Autónoma de Buenos Aires C1033AAJ, Argentina.
Heliyon
|January 12, 2024
概括
用尿素和硫酸盐补充葡萄汁可以在非常高重力 (VHG) 发酵中增强生物乙醇生产. 这种具有成本效益的气策略可以促进酵母菌的生长和低价值葡萄品种的乙醇产量.
科学领域:
- 生物技术是生物技术.
- 可持续农业 可持续农业
- 发酵科学 发酵科学
背景情况:
- 来自低价值品种的葡萄汁为生物乙醇生产提供了潜力.
- 非常高重力 (VHG) 发酵优化了乙醇产量和资源效率.
- 的可用性对酵母发酵期间的酵母性能产生了重大影响.
研究的目的:
- 研究不同源对酵母生长和发酵性能的影响.
- 为了确定从葡萄汁中生产VHG生物乙醇的最佳补充剂.
- 评估组合源的协同效应.
主要方法:
- 对五种酵母菌株 (Saccharomyces cerevisiae和Zygosaccharomyces rouxii) 的查.
- 在各种源 (硫酸氨酸,酵母提取物,Fermaid K,尿素) 的合成介质和天然葡萄汁中培养.
- 酵母菌生长,糖消耗,乙醇产量和副产品形成的分析.
主要成果:
- 由于发酵速度缓慢,Zygosaccharomyces rouxii菌株不适合VHG发酵.
- 硫酸和酵母提取物支持生长,但对发酵产生了取决于菌株的作用.
- 结合的尿素和硫酸盐显著改善了葡萄汁中的糖消耗和乙醇产量.
- 优化的度 (+600+150毫克/升) 最大限度地提高了乙醇的产量,并将副产品降到最低.
结论:
- 尿素和硫酸盐的组合是一种具有成本效益和协同作用的补充剂,用于VHG生物乙醇发酵.
- 这种方法提高了低酒学价值的葡萄品种在可持续生物能源生产中的价值.
- 优化的策略对于有效的工业规模生物乙醇生产至关重要.
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