Odor nuisance can be a significant problem for neighbors to large pig housing facilities and can have financial consequences for both the neighbors and the pig producers. Draining the slurry pit more often than normal may provide a simple and cost effective method to achieve significant reductions in odor emissions from pig housing units. Emissions of odor, ammonia, and hydrogen sulfide were measured over a six-month period in two identical sections, each housing 136 finishers. In one of the sections, the slurry was drained weekly, the other section followed typical Danish manure management practices whereby the slurry was removed twice during each production batch of finishers. The emissions of odor and hydrogen sulfide were reduced by nearly 50 %on the day after draining, but there was no effect on the ammonia emission. In Denmark, slurry pits in finisher units typically have a depth of 40 cm, with a slurry production capacity of 6-10 weeks, depending on the kind of flooring used in the pens andthe time of year.
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