2007 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
This report documents research conducted under a Trust Fund Cooperative Agreement between ARS and the National Pork Board. Additional details of research can be found in the report for the in-house associated project 5440-12000-060-00D, Environmentally sound manure management for reduction of health-related organisms and odor. Progress towards meeting the objectives is on track for the project. Agreements to sample manure stores at four cooperating operations were finalized and manure sampling was initiated in December 2006. The four cooperating operations include four lagoons, four deep pits, and four above-ground manure storage tanks. Progress on Objective 1 is progressing—as samples are collected, initial analysis of BOD, COD, pH, conductivity, and volatile solids is conducted. Subsamples have been preserved for odor compound analysis, which will be conducted at the end of the experiment. Similarly, laboratory studies evaluating relative odor compound emission during simulated manure application (Objective. 2)will be conducted at the end of the manure collection period using frozen manure subsamples. ADODR monitors activities to evaluate research progress including conference calls, meetings with cooperators, and site visits to plot locations.
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