ABSTRACT Odors are generated primarily as the result of manure storage but also result from animal housing and manure application. Effective odor control is dependent upon implementation of strategies that are complementary to management practices. Some systems use a deep pit or a holding tank for manure storage. In such systems, little or no biological processing occurs, and they are therefore considered high-load systems. In systems where biological processing occurs to a great extent, such as in anaerobic digesters or lagoons, the system would be termed a low-load system. Odor control strategies for manure storage areas, such as solids separation and additives, are best suited for low-load systems, whereas covers and biofilters provide the best results for high-load systems. Strategies that reduce nutrient production, such as dietary restriction of nutrients, are well-suited for all types of manure storage systems. To comply with current or pending odor control regulations, it is imperative that producers be provided with sound recommendations of odor control strategies.
Implications Odor control has become a necessary and integral part of livestock production. Adequate odor reduction levels are specific for each operator based on proximity to and reaction by neighbors. Willingness to incur costs associated with odor control is an additional consideration. Regardless, livestock producers must take the responsibility to implement effective odor control methods.
Key Words: Manures, Odors, Covers, Anaerobic Digestion, Aeration
© 1999, by the American Society of Animal Science and the American Dairy Science Association. All rights reserved.
AM Symp. 169-176