摘要：

通过中试，研究了PVDF材质的超滤膜直接处理高浊度海水的效果及其工艺性能。试验结果表明，该超滤膜的产水浊度平均值为0.11NTU，SDI15平均值为2.4，COD的平均去除率为60.0%，胶硅的平均去除率为89.0%；其跨膜压差<6.0×104Pa，远远小于超滤膜本身最大操作压差2.1×105Pa。因此，该超滤膜对浊度高、变化大的海水有很强的适应性，可以在以高浊度海水为进水的情况下作为海水反渗透系统的预处理装置。

关键词: 超滤, 海水, 浊度

Abstract:

It has been investigated that the effect and performance of the PVDF ultrafiltration membrane for treating the seawater having high turbidity directly through a pilot test. The experimental results indicate that the average turbidity is 0.11 NTU, the average SDI 15 is 2.4, the average removal rate of COD is 60.0% and the average removal rate of colloidal silica is 89.0% in the permeated water, and the TMP is lower than 6.0×10⁴ Pa, which is far lower than 2.1×10⁵ Pa, the max operating TMP of the membrane. Therefore, this ultrafiltration membrane has wide adjustabilitytothe high turbidityseawater, and it can be used for the pretreatment of the seawater RO while the inlet water is seawater havinghigh turbidity.

Key words: ultrafiltration, seawater, turbidity

中图分类号: 

• TQ085+. 411