ZHANGYu-cheng,WANGXin,CHENYi-han,et al.Pilot Experiment on Application of PVDF Membrane Repair and Regeneration Technology in Engineering[J].China Water & Wastewater,2023,39(23):23-29.
Pilot Experiment on Application of PVDF Membrane Repair and Regeneration Technology in Engineering
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第39卷
Number:
第23期
Page:
23-29
Column:
Date of publication:
2023-12-01
- Keywords:
- polyvinylidene fluoride (PVDF) membrane; membrane bioreactor (MBR); repair and regeneration; tannic acid
- Abstract:
- In the actual operation of membrane bioreactor (MBR), the hard particles contained in sewage will cause physical damage to the membrane surface or inside the membrane. With the increase of the service time of polyvinylidene fluoride (PVDF) membrane, periodic chemical cleaning will also lead to the aging of the membrane materials, and the membrane module will inevitably reach the end of its life when the phenomenon such as continuous decline of water production performance and gradual increase of maintenance cost is observed. Based on the laboratory experiment, the membrane structure was transformed by dimethyl sulfoxide (DMSO), the damaged membrane was repaired by tannic acid-iron coating to restore its production capacity, and the method was eventually applied in a pilot experiment. After 135 days of continuous operation, the water production performance of the repaired and regenerated membrane was significantly better than that of the control group, the effluent quality was stable, and the physical and chemical properties of the repaired membrane modules were improved comprehensively.
Last Update:
2023-12-01