Effects of solid-liquid separation and storage on monensin attenuation in dairy waste management systems
| Autor: | Sanjai J. Parikh, Thomas Harter, Sarah C. Hafner, Brian A. Bergamaschi, Naoko Watanabe |
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| Rok vydání: | 2016 |
| Předmět: |
Manure management
Environmental Engineering Farms 010501 environmental sciences Management Monitoring Policy and Law Environment Wastewater 01 natural sciences Waste Disposal Fluid California chemistry.chemical_compound Anaerobic lagoon Animals Leaching (agriculture) Monensin Waste Management and Disposal Groundwater 0105 earth and related environmental sciences Waste management Air Environmental engineering 04 agricultural and veterinary sciences General Medicine Manure Dairying Biodegradation Environmental chemistry 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Sewage treatment Aeration Water Pollutants Chemical |
| Zdroj: | Journal of environmental management. 190 |
| ISSN: | 1095-8630 |
| Popis: | Environmental release of veterinary pharmaceuticals has been of regulatory concern for more than a decade. Monensin is a feed additive antibiotic that is prevalent throughout the dairy industry and is excreted in dairy waste. This study investigates the potential of dairy waste management practices to alter the amount of monensin available for release into the environment. Analysis of wastewater and groundwater from two dairy farms in California consistently concluded that monensin is most present in lagoon water and groundwater downgradient of lagoons. Since the lagoons represent a direct source of monensin to groundwater, the effect of waste management, by mechanical screen separation and lagoon aeration, on aqueous monensin concentration was investigated through construction of lagoon microcosms. The results indicate that monensin attenuation is not improved by increased solid-liquid separation prior to storage in lagoons, as monensin is rapidly desorbed after dilution with water. Monensin is also shown to be easily degraded in lagoon microcosms receiving aeration, but is relatively stable and available for leaching under typical anaerobic lagoon conditions. |
| Databáze: | OpenAIRE |
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