Research on Intensive Ammonia Removal in Carrousel Oxidation Ditch

The study on the impact factors of simultaneous nitrification and denitrification (SND) in the Carrousel oxidation ditch was carried out based on pilot-scale to treat low C/N urban sewage. With the effect of SND in the oxidation ditch, the system could achieve the best removal for nitrogen of urban sewage with low C/N. And with SRT of 20 d, R of 50%, MLSS of 4000 mg/L, the ammonia, total nitrogen (TN) of effluent were lower than 5 mg/L, 13 mg/L, respectively. Based on this the kinetics model of TN removal was established, which could control the concentration of TN in the effluent effectively by adjusting HRT, MLSS and other parameters in the oxidation ditch, which would provide effective theory basis for optimization and adjustment of the process.