Dust emissions from a tunnel-ventilated broiler poultry shed with fresh and partially reused litter

Abstract

Dust emissions from large-scale, tunnel-ventilated poultry sheds could have negative health and environmental impacts. Despite this fact, the literature concerning dust emissions from tunnel-ventilated poultry sheds in Australia and overseas is relatively scarce. Dust measurements were conducted during two consecutive production cycles at a single broiler shed on a poultry farm near Ipswich, Queensland. Fresh litter was employed during the first cycle and partially reused litter was employed during the second cycle. This provided an opportunity to study the effect that partial litter reuse has on dust emissions. Dust levels were characterised by the number concentration of suspended particles having a diameter between 0.5 and 20 μm and by the mass concentration of dust particles of less than 10 μm diameter (PM10) and 2.5 μm diameter (PM2.5). In addition, we measured the number size distributions of dust particles. The average concentration and emission rate of dust was higher when partially reused litter was used in the shed than when fresh litter was used. In addition, we found that dust particles emitted from the shed with partially reused litter were finer than the particles emitted with fresh litter. Although the change in litter properties is certainly contributing to this observed variability, other factors such as ventilation rate and litter moisture content are also likely to be involved.

Odour, dust and non-methane volatile organic-compound emissions from tunnel-ventilated layer-chicken sheds: a case study of two farms

“…Methods for the collection and analysis of odour, dust and NMVOC samples have previously been described by Dunlop et al (2010), Modini et al (2010), Parcsi et al (2011) and Murphy et al (2012). The following is a brief summary of these methods and also describes variations from the previously described methods.…”

“…Dust originates from the mechanical breakdown and subsequent entrainment of mineral and organic material from birds, manure, feed and manure into the air, or the conversion of gases to the particle phase (Modini et al 2010). Only tunnelventilated layer sheds with manure belts will be considered in the present paper because, in general, layer sheds with manure belts have been found to have lower emissions than other shed styles (e.g.…”

“…temperature, humidity) (Navaratnasamy and Feddes 2004;Nimmermark and Gustafsson 2005;Angel et al 2008;Modini et al 2010;Mostafa and Buescher 2011;Xin et al 2011;Costa et al 2012;Ni et al 2012a). The interaction of these many factors creates challenges for measuring 'typical' emission rates, and also for comparing odour emission rates from discrete studies.…”

The effect of keeping turkeys of the parent herd on the regenerated laying on the microclimate of the poultry house, the well-being, and productivity of birds

“…Мікроклімат у пташнику та зоотехнічні показники курчат-бройлерів за їх вирощування на багатократно використовуваній підстилці вивчали у кількох дослідженнях. При цьому в одних із них спостерігали підвищений вміст пилу [8], а в інших -збільшення емісії аміаку порівняно з однократно використовуваною підстилкою [9,10]. Проте в жодному із цих досліджень вміст пилу й аміаку в повітрі пташника не перевищував ГДК.…”

Influence of Different Methods of Regeneration of the Used Turkey Litter on the Kinetics of the Process of Its Thermal Processing and Microbial Observation

“…У зв'язку з цим чимало фахівців галузі все частіше розглядають можливість регенерації використаної підстилки для повторного її застосування. Повторне використання підстилкових матеріалів дає змогу зменшити їх витрати, збільшити вміст в них поживних для рослин елементів (N, P, K) та знизити екологічне навантаження на довкілля [1,2].…”