Cleaning-in-Place: Modelling of Cleaning Kinetics of Pipes Soiled by Bacillus Spores Assuming a Process Combining Removal and Deposition
Cleaning-in-Place: Modelling of Cleaning Kinetics of Pipes Soiled by Bacillus Spores Assuming a Process Combining Removal and Deposition
复制标题
原位清洗：假设去除和沉积相结合的过程，对被芽孢杆菌孢子污染的管道进行清洗动力学建模
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
T. Benezech
中科院分区：
文献类型：
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作者：
C. Lelièvre;G. Antonini;C. Faille;T. Benezech
在食品工业中，需要对食品加工设备的未加热表面进行彻底的现场清洁程序，以通过去除微生物来确保食品的安全性。这项工作的目的是模拟去除动力学的芽孢杆菌孢子在清洗过程中的位置。选择这些孢子是因为它们在奶牛场中出现。发现蜡样芽孢杆菌孢子的去除强烈依赖于化学作用（氢氧化钠）（其降低孢子在硬表面上的粘附强度）和通过壁剪切应力清洁期间的流体动力学条件。一个简单的模型（一级反应）假设在清洗过程中结合去除和沉积的过程进行了详细的实验证实。此外，一个显着的效果上的有效去除速率常数的流动条件期间应用的污染程序和应用在清洗过程中进行了观察。
In food industries, thorough cleaning -in-place procedures for the unheated surfaces of food processing equipment are required to ensure the safety of food products by the removal of microorganisms. The aim of this work is to model the removal kinetics of Bacillus spores during a cleaning-in-place procedure. These spores were chosen for their occurrence in dairies. The removal of Bacillus cereus spores was found to be strongly dependent on both chemical action (sodium hydroxide), which lowers the adhesion strength of spores onto hard surfaces, and hydrodynamic conditions during cleaning through wall shear stress. A simple model (first-order reaction) assuming a process combining removal and deposition during cleaning was detailed and experimentally confirmed. In addition, a significant effect on the effective removal rate constant by both the flow conditions applied during the soiling procedure and applied during cleaning was observed.