减少瓶装水中的肠道病原体使用残留臭氧
William Ryan Schwaner1, Sanjay Kumar2, Harshavardhan Thippareddi3
1Department of Food Science and Technology, University of Nebraska, Lincoln, NE 68588, United States; Quality Assurance and Food Safety, Niagara Bottling LLC, Diamond Bar, CA 91765, United States.
剩余臭氧有效消毒瓶装水,实现4日志微生物减少. 然而,高总溶解固体 (TDS) 和非中性pH水平显著降低了臭氧.
科学领域:
- 食品科学 食品科学 食品科学
- 微生物学 微生物学
- 水处理技术水处理技术
背景情况:
- 臭氧消毒是瓶装水行业的标准做法.
- 维持残留臭氧水平对于确保微生物安全至关重要.
- 之前的研究强调了臭氧的有效性,但需要对参数进行优化.
研究的目的:
- 为了验证残留臭氧对关键的食源性病原体的疗效.
- 调查pH和总溶解固体 (TDS) 对臭氧消毒的影响.
- 确保瓶装水符合微生物安全标准.
主要方法:
- 试点规模的PET瓶子的臭氧化,臭氧度不同 (0.1-0.4毫克/升).
- 用特定的病原体进行注射 (大肠杆菌O157:H7,非O157STEC,沙门氏菌Typhimurium).
- 评价pH (5.0-9.0) 和TDS (5-500 mg/L) 对微生物减少的影响.
主要成果:
- 所有测试的病原体与残留臭氧 (0.1-0.4 mg/L) 实现了≥4个日志减少,接触时间≥5分钟.
- 升高的TDS (500 mg/L) 和非中性pH (5.0,9.0) 显著降低了臭氧的抗菌功效.
- 延长接触时间并没有显著增加微生物减少.
结论:
- 在最佳条件下,残留臭氧对瓶装水中的微生物安全有效.
- 像TDS和pH这样的水质参数对于有效的臭氧消毒至关重要.
- 监测和控制这些参数对于一致的食品安全合规性至关重要.
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