Windbreak walls are less expensive and perhaps an easier way to control swine odors. These walls, located 10 to 15 feet beyond the pit fans, create a dead airspace between the facility and the wall where dust settles. The wall causes odorous air to be pushed so far upward that it isn't a nuisance. These walls can easily be assembled using a tarp attached to framework. The walls should be easily reconstructed if knocked down by a windstorm.
Windbreak walls are a moderately effective, low-cost odor control technology.
Spraying soybean oil in aisles and pens inside a pig nursery can reduce dust-causing odors. For a 180-piglet facility, about 1 cup of oil was sprinkled with a handheld commercial paint sprayer each morning. Daily sprinkling can reduce odor levels by about 33 percent to 80 percent and dust levels by about an average of 50 percent. Animal and human health also benefit from reduced dust. The cost is minimal, but spraying daily does take time.