Use of duckweed-based constructed wetlands for nutrient recovery and pollutant reduction from dairy wastewater

•Duckweed wetlands reduce pollutants in dairy waste while producing valuable biomass.•First-order removal to a background best described treatment in duckweed wetlands.•Duckweed wetlands are best suited for primary treatment of dairy wastewaters.•Optimal nitrogen for duckweed growth higher for dairy...

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