膜吸收法处理工业废水过程中PVDF膜及组件优化

The Effect of PVDF Hollow Fiber and Module Properties on Membrane Absorption Process for Industrial Wastewater Treatment

以含氨废水为代表,采用实验室自制疏水性微孔聚偏氟乙烯(PVDF)中空纤维膜组件,通过实验考察了膜吸收工艺用于工业废水处理过程中膜丝及膜组件结构参数对传质效率和污染物去除率的影响。结果表明,膜吸收法去除废水中挥发性污染物效果良好,可以通过减小膜丝壁厚、增大膜丝内径来促进传质;另外,合理设计膜组件的长度和装填密度,可以近乎完全去除废水中的氨(去除率>99%),实现废水的达标排放。

This study investigated the influence of membrane and modules parameters on the mass transfer and pollutant removal efficiency using membrane absorption process with laboratory-made poly-vinylidene fluoride （PVDF） hollow fiber membrane modules. Wastewater containing ammonia was used as the representative of industrial wastewater. The results indicate that the membrane absorption process is efficient in treatment of volatile pollutant from wastewater. The mass transfer efficiency can be improved via reducing membrane thickness （δ）, and increasing fiber inner diameter （ID）. Moreover, choosing appropriate module length （L） and packing density （Φ） are important to obtain a nearly thorough removal of ammonia （〉99%） and achieve the safe wastewater discharge.