Influence of Carbon Source on Nitrogen and Phosphorus Removal by Anoxic/Anaerobic/Aerobic Process

By adding organic carbon source to change the influent C/N ratio,the nitrogen and phosphorus removal by the anoxic/anaerobic/aerobic process at different C/N ratios was investigated.The results show that under the conditions of the return ratio 120%,the influent C/N=7 and C/P=75,the anoxic/anaerobic/aerobic process has the optimal removal efficiencies of N and P,and the removal rates of TP,NH+4-N and TN can reach more than 95%,98% and 67% respectively.