Effectiveness of pollutants removal in hybrid constructed wetlands – different configurations case study

Abstract

In recent years, an increase in interest in hybrid constructed wetland systems (HCWs) has been observed. The aim of the paper is to compare different HCW configurations in terms of mass removal rates and efficiency of pollutants removal. Analysed data have been collected at multistage constructed wetlands in Poland, which are composed by at least two beds: horizontal subsurface flow (SSHF) and vertical subsurface flow (SSVF). The evaluation was focused on hybrid constructed wetlands performance with HF+VF vs. VF+HF configuration, where influent wastewater of the same composition was treated. In analysed HCWs, the effective removal of organic matter from 75.2 to 91.6% COD was confirmed. Efficiency of total nitrogen removal varied from 47.3 to 91.7%. The most effective removal of TN (8.3 g m-2 d-1) occurred in the system with VF+VF+HF configuration.

The efficiency and technological reliability of biogenic compounds removal during long-term operation of a one-stage subsurface horizontal flow constructed wetland

“…Small volumes of wastewater can be treated in wetland systems, both one-stage as well as hybrid ones [15][16][17][18]. The efficiency of pollution removal in these systems has been the focus of numerous works [3,4,15,[19][20][21][22][23]. Increasing attention is drawn to the reliability of wetland systems, especially with respect to the removal of the biogenic compounds nitrogen and phosphorus [24][25][26][27][28][29][30][31].…”