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Open AccessArticle

Treatment of Agricultural Drainage Water by Surface-Flow Wetlands Paired with Woodchip Bioreactors

1
Department of Agroecology, Aarhus University, Blichers Allé 20, 8830 Tjele, Denmark
2
Orbicon|WSP, Jens Juuls Vej 18, 8260 Viby J, Denmark
*
Author to whom correspondence should be addressed.
Water 2020, 12(7), 1891; https://doi.org/10.3390/w12071891
Received: 12 May 2020 / Revised: 29 June 2020 / Accepted: 30 June 2020 / Published: 2 July 2020
(This article belongs to the Section Wastewater Treatment and Reuse)
Nutrient losses from agricultural fields have long been a matter of concern worldwide due to the ecological disturbance this can cause to surface waters downstream. In this paper a new design concept, which pairs a surface-flow constructed wetland (SFW) with a woodchip bioreactor (WB), was tested in relation to its capacity to reduce both nitrogen (N) and phosphorus (P) loads from agricultural tile drainage water. A nutrient mass balance and a comparative analysis were carried out together with statistical regressions in order to evaluate the performance of four SFW+WBs under different catchment conditions. We found marked variations between the systems in regard to hydraulic loading rate (0.0 to 5.0 m/day) and hydraulic retention time (1 to 87 days). The paired system worked as nutrient sinks throughout the study period. Total N and total P removal efficiencies varied from 8% to 51% and from 0% to 80%, respectively. The results support the use of the new design concept for nutrient removal from tile-drained agricultural catchments in Denmark as part of national management plans, with the added advantage that smaller areas are needed for construction (0.1% to 0.2% of the catchment area) in comparison to standalone and currently used SCWs (~1%). View Full-Text
Keywords: nitrogen; phosphorus; denitrification; sorption; hydraulic loading rate; hydraulic retention time; woodchip bioreactors; constructed wetland nitrogen; phosphorus; denitrification; sorption; hydraulic loading rate; hydraulic retention time; woodchip bioreactors; constructed wetland
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MDPI and ACS Style

Pugliese, L.; Skovgaard, H.; Mendes, L.R.D.; Iversen, B.V. Treatment of Agricultural Drainage Water by Surface-Flow Wetlands Paired with Woodchip Bioreactors. Water 2020, 12, 1891. https://doi.org/10.3390/w12071891

AMA Style

Pugliese L, Skovgaard H, Mendes LRD, Iversen BV. Treatment of Agricultural Drainage Water by Surface-Flow Wetlands Paired with Woodchip Bioreactors. Water. 2020; 12(7):1891. https://doi.org/10.3390/w12071891

Chicago/Turabian Style

Pugliese, Lorenzo; Skovgaard, Henrik; Mendes, Lipe R.D.; Iversen, Bo V. 2020. "Treatment of Agricultural Drainage Water by Surface-Flow Wetlands Paired with Woodchip Bioreactors" Water 12, no. 7: 1891. https://doi.org/10.3390/w12071891

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