新型填料曝气生物滤池处理抗生素类废水

针对抗生素类制药工业废水难处理的特点,将某高效复合微生物菌群负载在以中孔和大孔为主的污泥炭颗粒的表面和孔隙内部,制备得到生物改性污泥炭。采用装填生物改性污泥炭的新型填料曝气生物滤池及向下流、中下部曝气的运行方式对以抗生素类制药废水为主的混合工业废水絮凝沉淀池出水中的主要污染物进行深度处理。结果表明,污泥炭载体在水中发挥2种作用,即吸附功能和载体功能,污泥炭表面及内部孔隙结构非常发达,为不同种类和功能的高效微生物菌群的构建和负载提供了良好的载体;采用粒径为8~10 mm的生物改性污泥炭、HRT 100 min及气水比3∶1,进水COD浓度96~123 mg/L、NH3-N浓度8.8~17.4 mg/L、TP浓度0.390~0.623 mg/L、pH 6~9,新型填料曝气生物滤池对混合工业废水中的COD、NH3-N和TP的平均去除率分别为47.2%、49.2%和35.6%,相比污水厂常规陶料填料生物滤池分别提高了27.9、21.6和12.8个百分点,该工艺处理效果稳定,运营管理简单,为极难生物降解的抗生素类废水为主的混合工业废水的深度处理提供了新思路。

Treating antibiotics wastewater by a new biological aerated filter

According to the refractory feature of antibiotic pharmaceutical wastewater, the bio-modified sludge charcoals were prepared by loading efficient complex microbial flora onto the surface and fore of charcoal particles with meso-and macro-pores-pore. The new BAF loaded with the bio-modified sludge charcoals and aerated downstream was applied to deeply treat main pollutants in antibiotic pharmacy-based mixed industrial effluent from flocculation tank. The experimental results show that sludge charcoals play two roles in the water, absorption feature and support function. Since the surface and internal pore structure of sludge charcoal are well developed, it can be used as a good carrier for different efficient microbial flora to build and load. When the diameter of the bio-modified sludge charcoal is 8~10 mm, HRT is 100 min and gas-water ratio is 3:1,the average removal rates of COD, NH₃-N and TP are 47.2%,49.2% and 35.6%, respectively, for the influent COD concentration of 96~123 mg/L, NH₃-N concentration of 8.8~17.4 mg/L, TP concentration of 0.390 ~ 0.623 mg/L, and pH of 6 ~ 9, by the new packing BAF, which enhance by 27.9%, 21.6% and 12.8% compared to pottery-packing BAF. This process, with the advantages of stable and simple to manage, provides a new method for advanced treatment for refractory antibiotic pharmacy-based mixed industrial wastewater.