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THE EFFECTS OF THREE PIG HOUSING SYSTEMS ON ODOR EMISSION

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Pp. 001-008 in Air Pollution from Agricultural Operations III, Proceedings of the 12-15 October 2003 Conference (Research Triangle Park, North Carolina USA), Publication Date 12 October 2003.  701P1403.(doi:10.13031/2013.15492)
Authors:   G. Mol and N. W. M. Ogink
Keywords:   Odor emission, Animal housing system, Odor reduction, Management

In densely populated countries like the Netherlands, nuisance caused by odor emissions from agricultural activities is increasing. A possible remedy for this problem is the use of low emission housing systems. Until now, however, no solid data were available to verify the effectiveness of such systems. With the development in the mid 1990s of an adequate olfactometric technique to quantify odor concentrations reproducibly, the different parties involved in odor regulation decided it a necessary step to measure the odor emissions of the different housing systems for the various animal categories. In this paper a selection of these results is reported to illustrate the effect of two low emission housing systems for pigs. One system involves the cooling of manure, the other involves the frequent removal of manure by flushing. Both systems were compared to conventional housing systems with slatted floors and storage of slurry beneath slats. Most of the sampled farms were regular livestock operations, but some were animal compartments at research stations. In all cases production took place under standard farm management.

Odor emissions from livestock operations proved to be highly variable both within individual farms (in time) and between farms. None of the systems, with the exception of the flushing gutter system for fattening pigs, showed a significantly lower odor emission than the conventional housings. Based on the results of individual farms, however, structurally lower odor emissions are to be considered possible. The flushing removal of manure from pig houses with the gutter system resulted in a significantly higher odor emission during the hour in which flushing took place. The peak emission during this hour was about 3 - 3.5 times higher than the regular (nonflushing) emission. This increased odor emission diminishes rather quickly; the odor emission during the hour after flushing had already decreased to normal values. (Download PDF)    (Export to EndNotes)