Control of odour and gaseous emissions from livestock buildings: Recent research and developments

Abstract

One major challenge in the continuous growth of the livestock industry is the increased emission of odorous gases, which is not just a nuisance but also a cause of serious health and environmental concerns. Several strategies which aim to: (i) reduce the formation of odorous gases; (ii) enhance dispersion of odour; (iii) capture odour and gases to prevent escape to the environment; and (iv) reduce odour and gaseous concentrations, are developed. These are achieved with the use or employment of one or more of: (i) diet manipulation techniques; (ii) additives and adsorbents; (iii) covers; (iv) shelterbelts or windbreaks; (v) ventilation systems; (vi) biofilters; and (vii) air scrubber. The advantages and limitations of each of these strategies are discussed in this review in order to guide the choice of which strategy to use in a specific livestock application. Moreover, this review also discusses potential researchable areas in the field of odour control in livestock facilities.