巴西工业酵母在玉米乙醇加工过程中表现出高固体含量的高发酵性能
Thaís O Secches1, Carla F Santos Viera2, Thaynara K E Pereira1
1Interinstitutional Graduate Program in Bioenergy (USP/UNICAMP/UNESP), Cidade Universitária, 330 Cora Coralina Street, Campinas, SP, CEP 13.083-896, Brazil.
Bioresources and bioprocessing
|April 22, 2024
概括
巴西工业酵母菌株,通常用于甘乙醇,显示出玉米乙醇生产的希望. 菌株BG-1和SA-1在高温和固体度下表现优异,改善了玉米乙醇产量.
科学领域:
- 生物技术是生物技术.
- 可再生能源可再生能源是可再生能源.
背景情况:
- 全球能源矩阵正在转向可再生燃料,需要增加产量.
- 巴西和美国是主要的乙醇生产国,使用不同的原材料 (分别是甘和玉米).
- 巴西正在将玉米纳入其乙醇生产中,调整现有的甘设施 ("柔性"磨坊).
研究的目的:
- 评估巴西工业酵母菌株 (BG-1,CAT-1,PE-2,SA-1) 用于玉米乙醇生产.
- 评估酵母在各种压力条件下的性能,包括高温和固体度.
- 为了比较这些菌株与标准玉米乙醇酵母 (乙醇红) 的疗效.
主要方法:
- 使用四种巴西工业酵母菌株 (BG-1,CAT-1,PE-2,SA-1) 和乙醇红作为对照的发酵试验.
- 在不同温度 (35°C) 和高固体度 (35%) 条件下对酵母性能进行评估.
- 分析乙醇含量和发酵生产率.
主要成果:
- 菌株BG-1和SA-1表现出显著的温度耐受性 (35°C).
- 在高固体度 (35%) 的情况下,BG-1菌株获得了超过19%的w/v乙醇.
- 菌株BG-1在35%固体发酵时表现出5.8%的生产率增长,而固体发酵率为30%.
结论:
- 巴西工业酵母菌株,特别是BG-1和SA-1,可用于玉米乙醇生产.
- 使用BG-1菌株发酵的高固体度 (35%) 显著提高了乙醇产量和生产率.
- 这些发现表明了在巴西优化玉米乙醇生产过程的途径.
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