scholarly journals Reflections on Odor Management for Animal Feeding Operations

Atmosphere ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 453
Author(s):  
Kevin Janni

Most animal feeding operation owners recognize that they need to manage odors from their operations as part of their social relationship with their neighbors and local community. That was not always the case. Odors, whether pleasant or unpleasant, can evoke strong emotions and physiological responses. Odors from animal feeding operations are normally considered unpleasant and offensive if strong smelling and smelled often or for long periods of time. Animal feeding operation owners need to be aware of their odor emissions and the impacts the odors have on their neighbors and community. Good neighbor relations and effective communications can help identify odor problems and communicate what is being done to manage them. Odor management research and education includes odor basics, key processes including generation, emissions and dispersion, impacts, community and neighbor relations, and numerous mitigation practices. Animal feeding operation owners considering practices to reduce odor emissions or their impacts need to weigh the costs, expected effectiveness, and how the practice fits into the overall operation. Policymakers need science-based information to make informed decisions that balance the concerns and needs of neighbors and the community and the businesswomen and men that own and operate the animal feeding operations. This paper provides a broad overview of animal feeding operation odors and odor management.

2018 ◽  
Vol 26 (1) ◽  
pp. 102-112 ◽  
Author(s):  
Anne T. Pollard ◽  
Matthew J. Morra

The US dairy industry has changed significantly during the past 20 years. The number of dairies declined 63% from 1997 to 2012 owing to the rise in concentrated animal feeding operations and the concomitant decline of small dairy farms. Efficient and cost-effective dairies adhering to the concentrated animal feeding operation business design are praised for their high milk production. However, with a per capita daily manure production of 55 kg, storage and disposal of manure at these large operations pose significant management challenges and environmental risks. Application to surrounding agricultural fields is a common practice for disposing of manure, but the fate and consequences of antibiotics present in dairy waste are issues of great concern. Although antibiotics in the environment promote microbial resistance, their risks to humans and the environment are not completely known. Understanding and predicting the fate of antibiotics from dairy manure in soils is complicated by the variability and complex interactions of soil factors in addition to the diversity of chemicals of emerging concern, their amphoteric structures, and potential antagonistic and synergistic interactions among chemicals of emerging concern. This review explores behavior of the tetracycline (TC) class of antibiotics from dairy manure in the soil environment. TC fate in soils depends significantly on soil pH, ionic strength, and soil organic matter (SOM). Molecular charge and physicochemical properties of TCs at typical soil pHs encourage strong sorption to soils; however, this interaction is complicated by organic matter and metals, and may also encourage development of antibiotic resistance. Furthermore, TC degradation products exhibit distinct properties from their parent compounds that also must be considered. Increased knowledge of the behavior of TC antibiotics in soil is needed to enable mitigation of their potential risks.


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