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Abatement of ammonia emissions from swine lagoons using polymer-enhanced solid-liquid separation
- A study was conducted to determine the effects of solid-liquid separation of liquid swine manure on ammonia emissions from lagoons. This determination was done at full-scale in two contiguous swine production units that had similar animal production management. One of these units was maintained as a control using the anaerobic lagoon treatment method. In the second production unit, solids were removed from liquid manure using an enhanced-polymer solid-liquid separation treatment prior to lagoon storage. The ammonia gas fluxes from both lagoons were measured simultaneously during a 10-month period (Feb.-Nov., 2004) using passive flux samplers. On average, the solid-liquid separation treatment separated 85% of total suspended solids (TSS), 60% of total solids (TS), 73% of chemical oxygen demand (COD), 81% of organic N, and 8% of total ammoniacal N (TAN) from the liquid entering the lagoon. Ammonia emissions from the anaerobic lagoon control totaled 12,542 kg N/yr (13,633 kg N/ha/yr). This compares to lower ammonia emissions of 3,426 kg N/yr (or 3,684 kg N/ha/yr) from the anaerobic lagoon treated with solid-liquid separation. Although water quality changes were modest in the treated lagoon with respect to the control, total annual NH3 emissions abatement in the lagoon with solid-liquid separation was 73% with respect to the anaerobic lagoon control. These results overall demonstrate that solid-liquid separation technologies can substantially reduce ammonia emissions from anaerobic swine lagoons.
Szogi, A.A. , Vanotti, M.B.
pig manure , waste treatment , solids , liquids , separation , manure storage , waste lagoons , pollution control , ammonia , gas emissions , anaerobic digestion , liquid manure
- Includes references
- Applied engineering in agriculture 2007, v. 23, no. 6
Journal Articles, USDA Authors, Peer-Reviewed
- Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.