2008 Annual Report
1a.Objectives (from AD-416)
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.
1b.Approach (from AD-416)
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.
3.Progress Report
Progress towards meeting the objectives is on track for the project. Manure sampling at all four cooperating operations, which include four lagoons, four deep pits, and four above-ground manure storage tanks, is complete. Objective 1 is nearly complete with all time sensitive analyses (temperature, BOD, COD, pH, conductivity, and volatile solids) complete. Preserved subsamples for odor compound and substrate analysis are now being analyzed. Laboratory studies evaluating relative odor compound emission during simulated manure application (Objective. 2)will be conducted this fall using frozen manure subsamples.
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