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Author(s): Leake, L.L.
Publication Date: January 1, 1996
Reference: Farm Industry News. January 1996. p 112-117.
Country: United States

Summary:

As livestock odors are not currently regulated by federal statutes and generally not regulated by state air pollution control agencies, many states and local government units have established regulatory guidelines for new livestock facilities constructions. Guidelines may include information about minimum distances, restricted use of anaerobic lagoons or control of manure disposal areas. More attention should be given to manage the lagoons: recycling the waste material on the land (as fertilizer), making sure the bottom of the lagoon is sealed, limiting the amount of material stored (limiting the water used for waste processing) (from P. Goodrich, professor Univ. of Minnesota). Additives to reduce odor are also discussed by R. Miner (bioresource engineer Oregon State Univ.) and P. Goodrich. Data on manure reduction from additives are not always conclusive and Miner mention that it would be unrealistic to anticipate that even noticeable odor changes obtained from additives to fresh manure or changes in diet would persist during manure decomposition and anaerobic storage. J. Van Horn (dairy scientist at Univ. of Florida) adds that as some additives may reduce the concentration of a specific odorous compound in the manure, but this additive doesn’t reduce the overall odor intensity making the product’s effectiveness very limited and its use economically uninteresting. Lagoon and feed additives are being studied by many scientist in Iowa State Univ. North Carolina State Univ. and Univ. of Florida. At North Carolina State Univ. researchers are also studying improved methods to utilize animal wastes and control odor and a project is done to find ways to reducing odor (preliminary findings point trees, barn cleanliness slurry aeration and liquid-solid separation as factors in the odor solution) and determine when odor become a nuisance. Researchers at Purdue Univ. and Penn State Univ. are studying dietary manipulation for odor reduction.

This article contains a lot of information. As some researchers question the ability of additives to control and reduce odor we can see that many teams in different U.S.Univ. are currently working on those additives. Solutions may lay in a combination of different practices to realize significant odor reductions.

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