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Oil spray reduces greenhouse gas emissions from pig finishing barns
Date:12/8/2008

onsible for 9.8 % of methane and 4.1 % of carbon dioxide in the total barn emissions.

A state-of-the-art mobile laboratory monitoring system was set up between two barns and connected to the barns via tubing and cables. One barn was used as control and another was treated with the three oil spray techniques, one after another for a total of 247 days. Air samples were taken at the exhaust fans of the two barns and from outdoor background and pumped into the mobile laboratory via tubing. Concentrations of methane and carbon dioxide in the sample air were measured continuously with two gas analyzers. Air sampling and measurement were conducted 18 times daily to cover diel variations. Ventilation fans were monitored for gas emission calculations. Barn temperature, relative humidity, animal activity, barn space heaters, manure flushing, and weather conditions were also continuously monitored. The field investigation was conducted from August 2002 to July 2003 to cover seasonal variations.

Quantification and mitigation of air pollution from animal feeding operations helps researchers to understand and reduce the industry's negative impact on local and global environments. Research on greenhouse gases and other pollutants emissions from animal barns of different animal species is ongoing at Purdue University in collaboration with other universities in the U.S. Mitigation technology development will be one of the research focuses in this field. Further study on oil spray in animal barns is needed to optimize its application method for better effects on reducing emissions of not only greenhouse gases but also particulate matter and odor.


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Contact: Sara Uttech
suttech@agronomy.org
608-268-4948
American Society of Agronomy
Source:Eurekalert

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