先进的非热处理:结合冷等离子体和脉冲电场用于E. 大肠杆菌在牛奶中的无活化
Kimia Taki1, Bahram Hosseinzadeh Samani1, Shirin Ghatrehsamani2
1Department of Mechanical Engineering of Biosystems Shahrekord University Shahr-e Kord Iran.
Food science & nutrition
|December 31, 2025
概括
一个新的大气冷等离子脉冲电场 (ACP-PEF) 系统有效地使牛奶中的大肠杆菌失活. 这种非热方法可以保存牛奶.
科学领域:
- 食品科学与技术 食品科学与技术
- 微生物学 微生物学
- 生物物理学的生物物理.
背景情况:
- 牛奶容易受到微生物污染,特别是大肠杆菌,这可能会给食品安全带来风险.
- 传统的热巴氏杀菌可能会对牛奶的营养和感官质量产生负面影响.
- 寻求非热加工方法,以确保牛奶的安全性,同时保持质量.
研究的目的:
- 开发和优化一种非热大气冷等离子体脉冲电场 (ACP-PEF) 系统,用于乳中的大肠杆菌失活.
- 评估ACP-PEF处理对关键牛奶质量参数的影响.
- 为了比较ACP-PEF与传统热巴氏杀菌的疗效.
主要方法:
- 使用 Box-Behnken 设计的响应表面方法 (RSM) 来优化 ACP-PEF 参数.
- 优化的关键参数包括电场强度,曝光时间,气比率和喷嘴角.
- 量化了大肠杆菌失活,并分析了牛奶质量属性 (pH,脂肪,蛋白质,乳糖,SNF,FFP,颜色).
主要成果:
- 在最佳的ACP-PEF条件下,可以显著减少大肠杆菌的4.656-log.
- 与未经处理的牛奶相比,牛奶的pH,脂肪,蛋白质,乳糖,SNF和FFP含量观察到的变化很小.
- 颜色差异 (ΔE) 是微不足道的,表明保留视觉质量.
- 与热巴氏杀菌相比,ACP-PEF系统的保存质量更高.
结论:
- 开发的ACP-PEF系统是一种高效的非热技术,用于使牛奶中的大肠杆菌失活.
- 这种方法为生产安全,高品质的牛奶提供了一个有希望的替代方案,其营养和感官降解最小.
- 该ACP-PEF系统具有可扩展性和节能性,适合在牛奶加工行业的工业应用.
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