多级悬浮填料生物反应器处理石化废水

Use of Multistage Suspended Carrier Bioreactor for Treatment of Petrochemical Wastewater

采用多级悬浮填料生物反应器处理石化废水 ,在填料投加率为 5 0 %、水力停留时间为 8h的工况条件下 ,当进水BOD5为 10 8～ 2 34mg/L、CODCr为 2 5 3.4～ 4 4 4.6mg/L、NH3 -N为 2 0 .8～ 2 6 .2mg/L时 ,二级反应器对其平均去除率分别为 90 .7%、74 %和 5 3.2 % ;三级反应器对其平均去除率分别为 93.7%、77.7%和 84 .6 % ,这说明采用多级反应器在保证有效去除BOD、COD等有机污染物的同时 ,可以大大提高对NH3 -N的去除效果。

The multistage suspended carrier bioreactor was used to treat petrochemical wastewater. The treatment effect was studied at the carrier dosage rate of 50% and hydraulic retention time of 8 h. For the influent concentration of BOD 5 108～234 mg/L, COD Cr 253 4～444.6 mg/L, and NH 3-N 20.8～26.2 mg/L, the average removal rate of these pollutants is respectively 90.7%, 74%, and 53.2% in the second stage reactor, and 93.7%, 77.6%, and 84.6% in the third stage reactor. It means that use of multistage reactor can greatly improve NH 3-N removal efficiency, while achieving the effective removal of BOD and COD .