Schulz Jochen, Bao Endong, Clauss Marcus, Hartung Jörg
Institute for Animal Hygiene, Animal Welfare and Farm Animal Behaviour, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany.
Berl Munch Tierarztl Wochenschr. 2013 Mar-Apr;126(3-4):143-8.
There is a need for technical solutions to reduce the concentrations of bioaerosols in the air and in the exhaust air of livestock buildings. A prototype of an air washer combined with a UV-irradiation system was positioned in a commercial pig fattening unit to test its efficiency of reducing culturable airborne microorganisms. No significant reduction in airborne bacteria and fungi was observed when untreated air passed through the device. However, when the air washer or the UV-irradiation system was activated, the concentrations of mesophilic aerobic bacteria, methicillin resistant Staphylococcus aureus and mesophilic aerotolerant cocci were reduced significantly (p < 0.01). Washing the air reduced bacteria by 84 to 96% and the relative reduction due to UV-irradiation ranged between 55 and 90%. The highest relative reduction in airborne bacteria (90 to 99%) was detected when the air washer and the UV-irradiation systems were in simultaneous operation. The concentration of total airborne fungi was reduced significantly (p < 0.05) only when the air was washed and UV-irradiated. Although these preliminary results provided significant and comprehensible findings, long-term studies are required to assess the efficiency of the device in more detail.The combination of air washing and UV-irradiation seem to be a useful technique for abating airborne microorganisms within or emitting from piggery buildings. However, some technical problems remain, such as the deposition of particulate matter on the surface of UV-irradiators and the consumption of fresh water by the air washer. These issues must be resolved before the system may be implemented for general practice.
需要技术解决方案来降低畜牧建筑内空气和废气中的生物气溶胶浓度。将一种结合了紫外线照射系统的空气洗涤器原型放置在一个商业养猪育肥单元中，以测试其降低可培养空气传播微生物的效率。当未经处理的空气通过该装置时，未观察到空气传播的细菌和真菌有显著减少。然而，当启动空气洗涤器或紫外线照射系统时，嗜温需氧菌、耐甲氧西林金黄色葡萄球菌和嗜温耐氧球菌的浓度显著降低（p < 0.01）。空气洗涤使细菌减少了84%至96%，紫外线照射导致的相对减少幅度在55%至90%之间。当空气洗涤器和紫外线照射系统同时运行时，检测到空气传播细菌的最高相对减少率（90%至99%）。仅当空气经过洗涤和紫外线照射时，空气中总真菌的浓度才显著降低（p < 0.05）。尽管这些初步结果提供了重要且易懂的发现，但仍需要进行长期研究以更详细地评估该装置的效率。空气洗涤和紫外线照射的组合似乎是一种减少养猪场建筑内或排放的空气传播微生物的有用技术。然而，仍然存在一些技术问题，例如颗粒物在紫外线辐射器表面的沉积以及空气洗涤器对淡水的消耗。在该系统可用于一般实践之前，必须解决这些问题。
