Constructed wetland Břehov for 100 PE was put in operation in October 2003. It is a typical horizontal subsurface flow system designed to treat municipal wastewater in the Czech Republic. Vegetated beds with a total surface area of 504 m2 are filled with washed gravel (4–8 mm) and planted with bands of Phalaris arundinacea and Phragmites australis. During the period 2004–2006, the treatment performance and vegetation growth were regularly monitored. The average treatment effects for BOD5, COD and suspended solids were high and amounted to 88%, 77% and 88%, respectively. The average outflow BOD5, COD and TSS concentrations during the monitored period were 16.5 mg l–1, 78.3 mg l–1 and 19.2 mg l–1, respectively. Removal of TN and TP amounted to 45% and 40%, with respective average outflow concentrations of 28 mg l–1 and 4.3 mg l–1. These results are quite commonly achieved in horizontal subsurface constructed wetlands in the Czech Republic. The results also indicated that during the warm period (May–October) treatment efficiency for nitrogen and phosphorus was higher than that during cold period of the year (November–April). Removal of organics and suspended solids was not affected by the season. Phalaris reached its aboveground biomass during the second growing season (2,265 g m–2), while Phragmites increased its biomass over the 3-year period (2,532 g m–2). The nutrient aboveground standing stocks were comparable with those observed in natural stands and did not exceed 5.3% and 6.2% of the inflow load of phosphorus and nitrogen.
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Kröpfelová, L. (2008). Constructed Wetland Břehov: Three Years of Monitoring. In: Vymazal, J. (eds) Wastewater Treatment, Plant Dynamics and Management in Constructed and Natural Wetlands. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-8235-1_16
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