BOdor reduction

The odor associated with the six functions of agricultural waste management often generates the most immediate response from the decisionmaker and adjacent residents. By anticipating the intensity, duration, and frequency of odors, AWMS components can be planned to reduce odors and for associated complaints. This includes areas of field application. Odor problems can be prevented or reduced through adequate drainage, runoff management, proper care to keep animals clean and dry, and appropriate waste removal, handling, and transport.

Locate waste management facilities and utilization areas as far as practical from neighboring residences, recreational areas, or other conflicting land uses. Avoid sites where there are radical shifts in air movement between day and night, such as those near large bodies of water or steep topography. A component's location in relation to surrounding topography may also strongly influence the transfer of odor because of daily changes in temperature and resulting air flow. To provide optimum conditions, prevailing winds should carry odors away from those who might object.

Odor can be further mitigated by providing conditions or design features that alter the microclimate around specific AWMS components. An abundance of sunlight and good ventilation, for example, helps keep livestock and poultry areas dry and relatively odor free. A southern exposure with adequate slope to provide positive drainage for runoff is a preferred condition. Keeping waste aerated and at appropriate moisture and temperature levels slows the development of anaerobic conditions and reduces odor.

Odor-causing substances from waste material are frequently attracted to dust particles in the air. Collecting or limiting the transport of dust aids in reducing odor. Vegetation is very effective in trapping dust particles as is demonstrated by observing dust-covered trees and shrubs on the edges of unpaved roads and quarry sites. Surface features on leaves or needles, such as spines, hairs, and waxy or moist films, help trap particulates. In figure 8-9 the black pines planted downwind trap odor-laden dust particles and provide a visual barrier between the swine operation and nearby residence.

In addition to trapping dust particles, vegetation, landform, and structures can channel wind to carry odors away from sources of potential conflict (fig. 8-10).

Figure 8-8 Streamside measures improve water quality

Figure 8-8 Streamside measures improve water quality

After

Figure 8-9 A vegetative screen between house (behind vegetative screen) and swine operation traps dust particles
Figure 8-10 Topography and vegetation can uplift winds to disperse odor

Earthen mound vr

Earthen mound Waste storage pond

Earthen mound

Wind

Wind

Waste storage pond
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Organic Gardeners Composting

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