Newly developed baffled subsurface-flow constructed wetland for the enhancement of nitrogen removal

► Baffled subsurface-flow constructed wetland for nitrogen removal enhancement. ► Enhancement of aerobic and anoxic/anaerobic conditions in baffled wetland unit. ► Better performance of baffled unit in NH4+-N removal due to longer pathway. ► Complete oxidized nitrogen removal due to release of COD from rice husk media.