Published online by Cambridge University Press: 02 September 2010
The management of pig manures and slurries has not responded to the changes that have occurred in the development of pig farms. Management systems have remained unchanged despite the fact that the majority of pigs (64%) are kept on 10–3% of all pig units. The pressures of heavy applications of manures on restricted areas of land and the large numbers of animals kept in buildings has given rise to environmental pollution by odours and by contamination of water and of the soil.
The cause of odour formation in buildings is discussed, together with the effects of dust on odour dispersion. Methods of reducing odours and the effect of straw on odour formation and slurry handling are discussed.
Methods of controlling odours from buildings, stores and from manure applied to the land are reviewed and areas which need further research and development are proposed.
Environmental pollution by manures and slurries of water and soils and measures to control pollution are reviewed.