Amending woodchip bioreactors with water treatment plant residuals to treat nitrogen, phosphorus, and veterinary antibiotic compounds in tile drainage

作者：Gottschall N; Edwards M; Craiovan E; Frey S K; Sunohara M; Ball B; Zoski E; Topp E; Khan I; Clark I D; Lapen D R^*

来源：Ecological Engineering, 2016, 95: 852-864.

DOI：10.1016/j.ecoleng.2016.06.011

• Woodchip bioreactor
• Nitrogen
• Phosphorus
• Antibiotics
• Controlled drainage

Treatment of drainage from agricultural production systems is one means to help improve water quality. Treatment of multiple pollutants, such as nitrogen and phosphorus together is a desirable attribute of systems that treat drainage and runoff from agricultural fields. In this study, the performance of inline woodchip (WC) only and woodchip bioreactors amended with 10% and 20% (vol) alum-based drinking water treatment plant residuals (WTR), were evaluated for treatment of N, P, and veterinary antibiotic compounds in tile drainage from field plots during, primarily, the < 5 degrees C non-growing season (fall 2013 to spring 2014) following land application of liquid swine manure (LSM) in fall. Removal efficiencies for both WC + 10% WTR and WC + 20% WTR amended bioreactors were significantly greater than woodchip only bioreactors for nitrate (NO3-N), total phosphorus (TP), and dissolved reactive P (DRP) (p < 0.05). Median removal efficiencies for NO3-N ranged from 33% (WC) to 74% (WC + 20% WTR). For total P, median removal efficiencies ranged between 28% (WC) to 64% (WC + 10% WTR), and for DRP they ranged between 35% (WC) to 89% (WC + 10% WTR). Removal efficiencies for NH4-N were not significantly different between WTR-amended and woodchip bioreactors. Removal efficiencies for a suite of veterinary antibiotic parent and transformation products, such as tylosin, chlortetracycline, and isochlortetracycline, were very high for all treatment systems (> 80%); albeit often input concentrations were in the lower ng L-1 range. This study demonstrated the utility of reusing industrial waste products in bioreactors designed to treat tile drainage effluent from agricultural field plots over a Canadian winter period following the land application of liquid swine manure.

• 出版日期2016-10