Project Number: 5440-12000-060-04
Project Type: Trust

Start Date: Dec 01, 2006
End Date: Jan 01, 2009

Objective:
1. Determine the changes in odor compound content and composition of manure in swine manure storage systems over the course of a year (predominantly finisher) in multiple above ground, deep pits, and lagoon manure storage systems. 2. Characterize and compare the relative emission of volatile odor compounds by gas chromatography-mass spectroscopy from multiple simulated manure applications.

Approach:
Three types of swine waste storage (above-ground storage, deep pit, and lagoon) will be sampled every three weeks at replicated sites throughout the year in order to measure the accumulation of odor compounds. Several site environmental and manure parameters (temperature, pH, manure/crust depth, ash content, biological oxygen demand, etc.) will be measured along with the collection of animal production information (number of animals, and producer schedules of manure flushing/pit cleaning/etc.). Every nine weeks, additional sample will be collected to make a mixed sample (solids, liquids, and crust) and used in soil incubation studies conducted in the laboratory in order to determine any odor compound emission potential after manure application. Malodorous volatile organic compounds (VOC) will be extracted from manure subsamples using established protocols, and the VOC emitted from a second subsample will be determined using an emission chamber and gas chromatography-mass spectroscopy.