IFAS工艺强化处理石化废水效果的研究

采用IFAS工艺对某石化污水处理厂原有的A/O工艺进行强化处理,达到提标改造目的的同时研究不同运行条件对COD、氨氮和总氮处理效率的影响.结果表明:IFAS-A/O反应器A池最佳载体投配比为10％,O池为15％;最适好氧池DO、回流比和HRT分别为1～2.5 mg/L、150％～200％和12 h～18 h.在反应器连续运行30天及HRT减少17％的情况下,与同步运行污水处理厂处理效果相比较,出水COD基本相同,氨氮有一定降低,TN显著降低,满足了《辽宁省综合污水排放标准》(DB 21/1627-2008)中直接排放的水污染物最高允许排放浓度要求.

Study on Effect of IFAS Process to Treatment of Petrochemical Wastewater

In this study, IFAS process was used to strengthen the original A/O process in a petrochemical wastewater treatment plant.Meanwhile, the influence of different operating conditions on the treatment efficiency of COD, ammonia nitrogen and total nitrogen was studied.The results show that in the IFAS-A/O,the optimum carrier ratio of A reactor is 10％, O tank is 15％, and the optimum aerobic zone of DO, reflux ratio and HRT are 1～2.5 mg/L,150％～200％ and 12～18 h.When the reactor run continuously for 30 days and HRT decreased by 17％, compared with the treatment effect of synchronous operation of the sewage treatment plant effluent, CODis basically the same, but ammonia nitrogen having a lower, and TN significantly reduced, meeting the "Liaoning Province Comprehensive Sewage Discharge Standard"(DB21/1627-2008)by the direct discharge of water pollutants maximum emission concentration requirements.