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