During a six-month experiment, high efficiency of
ammonia removal was observed. The influence of FASSTT LWA as a bed material and the presence of reed
on CW treatment efficiency was determined. The highest total nitrogen removal efficiency, 59.5%, was
obtained in the CW with double-layer lysimeters consisting of 25% FASSTT LWA (upper layer), and 75%
gravel (lower layer), and planted with reed.