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实验通过分别组建传统一体式PAC-MBR工艺装置和改进型分体式BPAC-UF工艺装置,对比研究了2组工艺装置对微污染源水氨氮和有机物的动态去除能力以及运行过程中的膜污染状况。结果表明,原理相同而构造不同的2组工艺对于氨氮及以COD_(Mn)和UV_(254)表征的有机污染物的去除能力相当,BPAC-UF工艺略显优势。由于BPAC-UF工艺具有较长的水力停留时间(HRT),微生物作用较充分,其抵抗膜污染能力更强。实验同时发现,在原水水质发生较大波动时,BPAC-UF污染物去除能力受影响幅度较PAC-MBR更小。但此时由于微生物分泌物增多,PAC-MBR工艺膜表面形成的炭骨架更利于吸附拦截生物分泌物,降低膜污染。
Experiments were carried out to build a traditional integrated PAC-MBR process unit and an improved split BPAC-UF process unit respectively to compare the dynamic removal ability of ammonia nitrogen and organic compounds from micro-polluted source water and membrane fouling during operation. The results show that BPAC-UF process is slightly superior to the two processes with the same principle and different structures for ammonia removal and the removal of organic pollutants characterized by COD_ (Mn) and UV_ (254). Because BPAC-UF process has a longer hydraulic retention time (HRT), microbial action is more adequate, its ability to resist membrane fouling. The experiment also found that BPAC-UF pollutant removal capacity was less affected than PAC-MBR when the raw water quality fluctuated greatly. But at this time due to the increase of microbial secretions, the carbon skeleton formed on the surface of PAC-MBR membrane is more conducive to adsorption and interception of biological secretions, reducing membrane fouling.