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

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>i</i>) reduce the formation of odorous gases; (<i>ii</i>) enhance dispersion of odour; (<i>iii</i>) capture odour and gases to prevent escape to the environment; and (<i>iv</i>) reduce odour and gaseous concentrations, are developed. These are achieved with the use or employment of one or more of: (<i>i</i>) diet manipulation techniques; (<i>ii</i>) additives and adsorbents; (<i>iii</i>) covers; (iv) shelterbelts or windbreaks; (<i>v</i>) ventilation systems; (<i>vi</i>) biofilters; and (<i>vii</i>) 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.