一体化A／O工艺碳氮比对脱氮除碳的影响

Influence of carbon to nitrogen ratio on nitrogen and carbon removal by integrative A/O process

依据好氧硝化和缺氧反硝化生物脱氮除碳工艺原理，设计了一体化生物膜法A／O反应器，并将其应用于生活污水处理，取得了理想的处理效果。实验结果表明，水力停留时间HRT=12h，COD进水浓度处于150～500mg／L范围内，COD的去除率均在90％以上，且出水均在40mg／L以下；当C／N比为8．5以下时，NH3-N去除率高于90％，其出水浓度小于5mg／L；当C／N比为7．5左右时，具有较高的总氮脱除效果，TN去除率可达到70％。

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 500mg/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.