在Spathaspora passalidarum中评估化过程条件:pH值,基质与乳液比率,温度和初始乙醇度的影响
Victoria M Guzmán1,2, Rodrigo J Leonardi1,2, Sofía Racca1,3
1Grupo de Procesos Biológicos en Ingeniería Ambiental (GPBIA), Facultad de Ingeniería y Ciencias Hídricas (FICH), Universidad Nacional del Litoral (UNL), Ciudad Universitaria CC 242 Paraje El Pozo, 3000, Santa Fe, Argentina.
Current microbiology
|November 7, 2024
概括
斯帕萨斯波拉帕萨利达勒姆有效地发酵了二代乙醇的纤维纤维素生物质. 这种酵母在葡萄糖之后利用西洛斯,在30°C和pH值为4.0的情况下表现最佳,这对于先进的生物燃料生产至关重要.
科学领域:
- 生物技术是生物技术.
- 生物能源是生物能源.
- 微生物发酵 微生物发酵
背景情况:
- 从纤维素生物质生产的第二代生物乙醇 (2G) 面临着使用糖的挑战.
- 传统的酵母菌株如Saccharomyces cerevisiae不能有效地代谢西洛斯,西洛斯是半纤维素的关键成分.
- 斯帕萨斯波拉 (Spathaspora passalidarum) 是一种有前途的混合发酵酵母,因为它具有氧化糖同化能力.
研究的目的:
- 进行Spathaspora passalidarumNRRL Y-27907.7.的综合代谢,胆量计和运动分析.
- 为了研究混合葡萄糖和草甘培养物的发酵性能.
- 分析各种参数对酵母发酵的影响,包括注射剂-基质比率,基质成分,pH,温度和乙醇耐受性.
主要方法:
- 用数学生物过程建模来分析发酵数据.
- 实验的重点是混合葡萄糖和树脂糖的培养物.
- 系统评估了诸如初始糖度,注射剂大小,pH,温度和初始乙醇水平等关键变量.
主要成果:
- 斯帕萨斯波拉 (Spathaspora passalidarum) NRRL Y-27907 显示了连续的糖消耗,仅在葡萄糖耗尽后使用西洛斯.
- 混合糖培养中的乙醇产量与使用单个糖的乙醇产量相当.
- 最佳发酵发生在30°C,用25g/L的西洛斯和0.50g/L的注射剂.
- 酵母菌株在pH值为4.0时表现出强度,并且耐受起始乙醇度高达20g/L.
结论:
- 斯帕萨斯波拉 (Spathaspora passalidarum) NRRL Y-27907 是一种可行的候选物,可以从红纤维素原料生产2G生物乙醇.
- 了解其代谢和运动行为对于优化整合生物过程至关重要.
- 该研究为设计使用混合糖基质的高效发酵策略提供了关键数据.
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