The CW system was 71 m long, with a total area of 96.6 m2, and was planted with four native macrophyte species, C. giganteus (20 m2), T. domingensis (13 m2), E. crassipes (10 m2), and P. cordata (3 m2). Immediately after plant
transplantation, the CW system lined with a shallow and clayey bottom was filled to a depth of approximately 0.30 m with a continuous water flow. The CW system receives the wastewaters of the Aquaculture Center and UASB system through
two concrete pipes in a flow distribution box, for uniform and even influent flow distribution. The wastewater, after passing through the CW system, was collected in another flow distribution box and discharged into the Jaboticabal stream. The geographic location and layout of the CW system are shown in Fig. 1.