... technical feasibility of this process was demonstrated. The effects of recycle ratio, HRT of the regeneration tank, HRT of the adsorption tank and SRT of the system were evaluated. The removal efficiency ... 1 h for the three reactors, while the HRT of the adsorption tank were kept at 30 min. In Series II, R was increased from 20% to 60%, and the SRT, HRT of regeneration tank, and HRT of the adsorption ... Variations of COD, NH4+-N, and PO43--P removals vs. time at different HRTs of the adsorption tank The effect of HRT of the adsorption tank to the CARS process is shown in Fig. 5. The COD...