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ARS Home » Midwest Area » Ames, Iowa » National Laboratory for Agriculture and The Environment » Soil, Water & Air Resources Research » Research » Research Project #436884

Research Project: Emissions Factors for N and S from Swine Finishing Operations

Location: Soil, Water & Air Resources Research

Project Number: 5030-11610-006-003-N
Project Type: Non-Funded Cooperative Agreement

Start Date: Jul 1, 2019
End Date: Jun 30, 2021

Objective:
Develop science based information on the impact that agricultural practices have on animals and emissions from swine grow-finishing operation. 1) Monitoring indoor air quality during multiple grow-finishing cycles. 2) Determine building emissions and manure storage using mass balance approach. 3) Determine emission loss of nutrients during field applied manure.

Approach:
A mass balance approach for N and S from a swine finishing operation will be made using data collected on N and S inputs (feed, water, animals) and N and S outputs (live and dead animals, manure, N2O, NH3 and H2S emissions). The amount of feed delivered to animals, swine performance, and building ventilation will be supplied by Cooperator. Air Quality Monitoring: Approximately at the end of each feeding phase intensive air quality measures will be made inside barn for one week durations. Sampling events will run for approximately 4-5 days for each event. During intensive air quality sampling, the following air concentrations will be quantified: 1) ammonia ; 2) hydrogen sulfide; 3) methane; 4) volatile organic compounds; 5) carbon dioxide, and 6) particulate material (PM). Emissions from barns will be based on ventilation rates and air concentration of gases and PM. Manure sampling will be taken during each intensive field monitoring campaign. Manure samples will be analyzed for total N and S and other water quality parameters. Whole field emission flux of NH3 will be determined using inverse dispersion modeling techniques based on ambient NH3 laser concentrations coupled to a eddy covariance data. Emission flux will be calculated from a backward Lagrangian stochastic dispersion model. Cooperator will supply manure samples and application rate for determining N input into the field. Data from building flux, animal performance, manure and manure field application will be combined to determine flow of N and S in swine finishing operation. Manure sampling will be taken during each intensive field monitoring campaign. Manure samples will be analyzed for total N and S and other water quality parameters. Whole field emission flux of NH3 will be determined using inverse dispersion modeling techniques based on ambient NH3 laser concentrations coupled to a eddy covariance data. Emission flux will be calculated from a backward Lagrangian stochastic dispersion model. Cooperator will supply manure samples and application rate for determining N input into the field. Data from building flux, animal performance, manure and manure field application will be combined to determine flow of N and S in swine finishing operation.