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采用3组动态膜生物反应器(DMBR)分别投加不同量的粉末活性炭(PAC)同时运行平行实验的方法,考察投加PAC对长期运行的PAC-DMBR复合工艺处理生活污水的效果及对污泥混合液特性的影响。结果表明,投加PAC后强化了PAC-DMBR对污染物的处理效果,COD、氨氮、TP、UV_(254)和色度的去除率均有提升。PAC投加量为3g/L时运行效果最好,稳定通量增加且运行周期延长,浊度在30 min内即降至1 NTU以内,且出水水质更好。投加PAC后改善了污泥混合液特性,促进了动态膜的形成过程及结构改变,主要表现为投加PAC后污泥粒径均有增大,污泥混合液沉降性能更好,EPS含量降低且比好氧速率有轻微提升。
Three groups of dynamic membrane bioreactor (DMBR) were added different amounts of powdered activated carbon (PAC) at the same time running a parallel experiment method to investigate the PAC PAC-DMBR long-term effect of combined treatment of domestic sewage treatment effect and pollution Effect of mud mixture characteristics. The results showed that PAC-DMBR enhanced the treatment effect of pollutants after PAC addition, and the removal rates of COD, ammonia nitrogen, TP, UV 254 and chromaticity increased. When the dosage of PAC is 3g / L, the operation effect is the best, the stable flux increases and the operation period prolongs. The turbidity drops to less than 1 NTU within 30 min, and the effluent quality is better. After PAC was added, the characteristics of sludge mixture were improved and the formation process and structure of dynamic membrane were promoted. The results showed that the particle size of sludge increased, the sedimentation performance of sludge mixture was better, the EPS content Lower and slightly higher than the aerobic rate.