气浮—2级A/O+MBR处理高盐肝素钠废水研究

采用气浮-2级A/O+MBR处理的综合工艺,对NaCl、NH3-N的质量浓度分别达20、1.2 g/L的高盐、高氨氮肝素钠废水进行中试处理研究。结果表明,经过120 d的污泥培养驯化与系统稳定运行之后,生物系统中Cl-的质量浓度维持在20 g/L,生物系统的COD由30 g/L降至0.3 g/L,NH3-N的质量浓度由1 200 mg/L降至0.5 mg/L,TN、TP的质量浓度分别由2 400、1 100 mg/L降至13、40 mg/L。其中COD和NH3-N、TN含量均达到出水指标,而TP含量未达出水指标,需进行后续深度处理继续除磷。污水中盐度对TP去除的影响较大,COD其次,对脱氮效率的影响最小。系统稳定运行,同时耐盐污泥活性良好。

Study on the Treatment of High-salinity Sodium Heparin Wastewater by Air Flotation-Two Stage A/O+MBR

High-salinity and high-ammonia heparin sodium wastewater, the mass concentration of NaCl and NH3-N reached 20 and 1.2 g/L respectively, was treated by air flotation-two-stage A/O+MBR composite process. The results showed that, after 120 d of sludge culture and domestication and stable operation of the system, the Cl- mass concentration in the biological system was maintained at 20 g/L, the COD was reduced from 30 g/L to 0.3 g/L, and the NH3-N mass concentration was reduced to 0.5 mg/L, TN and TP mass concentration reduced from 2 400 mg/L to 13 mg/L and 1 100 mg/L to 40 mg/L respectively. Among them, COD, NH3-N and TN content all reached the effluent standard, while the TP content did not reach the effluent standard, which needs further advanced treatment to remove phosphorus. The salinity of wastewater had a great influence on the removal of TP, followed by COD and the least was denitrification. The system operates stably and the sludge activity has a good activity.