Sustainable and microbiologically secure foodstuff production lines are of increasing scientific interest and are in the focus of recent research programs. Additionally, they are of great importance for the production industry due to the prevention of food-borne illnesses caused by pathogens such as Salmonella sp., Listeria monocytogenes, or Escherichia coli. These pathogens are responsible for production losses, loss of customer acceptance, and severe food-borne illnesses. A pathogenic threat is frequently combated with sanitizing steps of the production lines. For conveyor band cleaning, this study compares the cleaning abilities of nitric acid (HNO₃) and plasma treated water (PTW), which have been sprayed via a commercially available nozzle on two different polymeric surfaces (polysiloxane and polyurethane). Additionally, the cleaning agents HNO₃ and PTW have been characterized through their pH and their conductivity. These findings have been underpinned by experiments that focus on a possible influence of nozzle abrasion, such as brass and stainless-steel nanoparticles, on the antimicrobial potential of PTW and HNO₃. Adversely acting effects like an enhanced abrasion of conveyer band materials due to PTW or HNO₃ treatment have been checked by using light microscopic micrographs and topographic scans in high-resolution mode. Based on the presented results of the experiments, the suitability of an in-place sanitation step in foodstuff production lines has been demonstrated on a laboratory scale.

中文翻译：

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减少和改进：用于可持续食品生产线中传送带清洁的等离子处理水与传统消毒剂的对比

可持续和微生物安全的食品生产线受到越来越多的科学关注，并且是最近研究计划的重点。此外，由于预防由沙门氏菌属、单核细胞增生李斯特氏菌或大肠杆菌等病原体引起的食源性疾病，它们对生产行业非常重要。这些病原体导致生产损失、客户接受度下降和严重的食源性疾病。通常通过生产线的消毒步骤来对抗病原体威胁。对于输送带清洗，本研究比较了硝酸 (HNO ₃) 和等离子处理水 (PTW)，它们已通过市售喷嘴喷洒在两种不同的聚合物表面（聚硅氧烷和聚氨酯）上。此外，清洁剂 HNO ₃和 PTW 已通过其 pH 值和电导率进行表征。这些发现得到了实验的支持，这些实验侧重于喷嘴磨损（例如黄铜和不锈钢纳米颗粒）对 PTW 和 HNO ₃的抗菌潜力的可能影响。由于 PTW 或 HNO ₃造成的不利影响，例如传送带材料的磨损加剧已通过使用光学显微照片和高分辨率模式的地形扫描来检查治疗。根据所呈现的实验结果，食品生产线中就地卫生步骤的适用性已在实验室规模上得到证明。