The effect of stratification and seasonal variability on the profile of an anaerobic swine waste treatment lagoon |
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Authors: | Lovanh Nanh Loughrin John H Cook Kimberly Rothrock Michael Sistani Karamat |
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Affiliation: | Animal Waste Management Research Unit, USDA-ARS, 230 Bennett Lane, Bowling Green, KY 42104, USA. nanh.lovanh@ars.usda.gov |
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Abstract: | In this study, the characterization of an anaerobic swine waste treatment lagoon from a farrowing operation (approximately 2000 sows) was carried out to examine the dynamics of the system due to stratification and seasonal variability. Swine waste samples were taken at different depths with a pulley system equipped with a special sampler that allows for sampling exclusively at certain depth. Chemicals and microbial dynamics were monitored throughout a one-year-period. Results showed that nutrient (C, N, P, S) concentrations varied according to stratified lagoon layers and season. Trace minerals (Al, Ca, Fe, and Mg), on the other hand, appeared to be affected more by stratification than seasonal variability. Molecular analysis also showed that microbial community structure appeared to be affected by the stratification and seasonal variability. Based on these data, it is important to consider the effect of stratification and seasonal variability in managing these open lagoons. |
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Keywords: | DGGE ICP Stratification Anaerobic lagoon Swine |
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