超滤膜用于水厂工艺改造的中试研究

Pilot-scale Experiment on Ultrafiltration Membrane for Process Transformation of Waterworks

采用超滤膜结合水厂的传统处理工艺,考察了絮凝/沉淀/超滤组合工艺(工艺1)和絮凝/沉淀/砂滤/超滤组合工艺(工艺2)对不同水质期的滦河原水的处理效果。结果表明,两种工艺对浊度均具有良好的去除效果,出水浊度都稳定在0.1 NTU以下;相比之下,工艺2对CODMn、UV254、TOC和氨氮的去除效果更好,并且其出水水质更稳定,抗水质冲击能力更强,可用通量和产水率更高;两种工艺对DOM和UV254的去除作用主要体现在分子质量>30 ku的有机物上。

The combined process of flocculation, sedimentation and uhrafiltration membrane （process 1 ） and the combined process of flocculation, sedimentation, sand filtration and uhrafiltration membrane （ process 2） were used to treat Luan River water. The treatment efficiency of the two combined processes in different water quality periods was investigated. The results showed that turbidity could be effectively removed by the two combined processes, and the effluent turbidity was all less than 0.1 NTU. Compared with the process 1, the process 2 has better removal rates of CODMn, UV254, NH3 - N and TOC, a more stable effluent quality, a stronger shock load resistance and a higher membrane flux and permeability. The removal of DOM and UV254 in the two processes was mainly reflected in the molecular weight range of more than 30 ku.