Influence of carbon to nitrogen ratio on nitrogen and carbon removal by integrative A/O process
一体化A/O工艺碳氮比对脱氮除碳的影响

Based on the principle of anoxic/oxic (A/O) process,the integrative biofilm A/O reactor was designed and applied to carbon & nitrogen removal for domestic sewage, and the satisfactory results are achieved. The results showed that the removal rate of COD is more than 90% and the effluent COD is less than 40 mg/L when HRT is 12 h and the influent COD concentration is from 150 mg/L to 500 mg/L, and the removal rate of NH3-N is more than 90% and the effluent NH3-N<5 mg/L when carbon to nitrogen (C/N) ratio is less than 8.5. Nitrogen removal is effective, the removal rate of total nitrogen (TN) is more than 70% when C/N ratio is about 7.5.