Zeitler-Feicht M H, Praml G J, Riedel H
Lehrstuhl für Tierhygiene und Nutztierkunde, Technischen Universität München-Weihenstephan.
Berl Munch Tierarztl Wochenschr. 1991 Mar 1;104(3):84-9.
The temporal variation of airborne dust concentration (less than or equal to microns) was examined with an instrument operating on the nephelometer principle combined with a specifically adapted data processor in two pig fattening houses at night, at day and during feeding. Activities and factors affecting the dust level were noted. The measurement system allows the uptake and storage of values in the stable. For further processing, the data can be transmitted to a personal computer. In our experience the instrument is very suitable for the registration of airborne dust concentration in animal confinement buildings. Peak concentrations ranging up to 100 mg/m3 in intervals of 10 seconds could be measured. The data of a longer trial were averaged over 1.5 minutes. Animal activity has a great influence on the dust concentration. The highest mean concentration of dust with maximally 2.5 mg/m3 were determined at feeding time and when pigs were disturbed. The concentration of airborne dust particles was obviously lower at night than at day. A defect of the ventilation system, referable to the emission of feed dust, was disclosed by the continuous registration of air dust concentration, in one of the pig fattening houses. During the feeding periods, for a short time of less than 20 seconds, the dust concentration rises to 100 mg/m3 resp. 27 mg/m3 by dry resp. wet feeding. About 30 minutes after feeding the dust concentration was again in the average of 0.67 mg/m3. In conclusion the results were considered under hygienic and medical aspects.
利用一台基于散射测尘仪原理运行的仪器，并结合一台经过专门改装的数据处理器，在夜间、白天和喂食期间，对两个养猪育肥舍中的空气中粉尘浓度（小于或等于微米）的时间变化进行了检测。记录了影响粉尘水平的活动和因素。该测量系统能够在畜舍内采集并存储数据值。为了进一步处理，数据可以传输到个人计算机。根据我们的经验，该仪器非常适合记录动物饲养建筑中的空气中粉尘浓度。能够测量出在10秒间隔内高达100毫克/立方米的峰值浓度。较长时间试验的数据以1.5分钟为间隔进行平均。动物活动对粉尘浓度有很大影响。在喂食时间以及猪受到干扰时，测得的最高平均粉尘浓度为2.5毫克/立方米。夜间空气中粉尘颗粒的浓度明显低于白天。通过对一个养猪育肥舍空气中粉尘浓度的连续记录，发现了一个与饲料粉尘排放有关的通风系统缺陷。在喂食期间，在不到20秒的短时间内，通过干喂和湿喂，粉尘浓度分别升至100毫克/立方米和27毫克/立方米。喂食后约30分钟，粉尘浓度再次平均为0.67毫克/立方米。最后从卫生和医学方面对结果进行了考量。
