Abstract
Odor, ammonia and hydrogen sulfide emission data were collected from three phototrophic and three non-phototrophic anaerobic swine lagoons in eastern Nebraska from May 27th to June 18th (late spring) and from July 7th to August 13th (summer). The greatest odor, hydrogen sulfide and ammonia emission rates were from non-phototrophic lagoons during late spring (24.5 OU m-2 s-1, 3.2 µg-H2S m-2 s-1, 34.9 kg NH3-N ha-1 d-1, respectively). Non-phototrophic lagoon odor, ammonia and hydrogen sulfide emission rates were much higher in late spring than summer (24.5 vs. 4.8 OU m-2 s-1, 34.9 vs. 18.0 kg NH3-N ha-1 d-1, 3.2 vs. 0.3 µg-H2S m-2 s-1, respectively). Odor and ammonia emission rates from phototrophic lagoons were relatively constant from late spring to summer (9.4 vs. 4.0 OU m-2 s-1 and 23.0 vs. 16.5 kg NH3-N ha-1 d-1, respectively), but hydrogen sulfide emissions were higher in late spring than summer (1.9 vs. 0.1 µg-H2S m-2 s-1).
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