SHAORuonan,LI Xiaomeng,LIUChao,et al.Mechanism of Membrane Fouling in Process of Reverse Osmosis Concentrated Water Treatment by Vacuum Membrane Distillation[J].China Water & Wastewater,2026,42(7):99-105.
Mechanism of Membrane Fouling in Process of Reverse Osmosis Concentrated Water Treatment by Vacuum Membrane Distillation
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第42卷
Number:
第7期
Page:
99-105
Column:
Date of publication:
2026-04-01
- Keywords:
- vacuum membrane distillation; reverse osmosis concentrated water; operational optimization; membrane fouling mechanism
- Abstract:
- During the vacuum membrane distillation (VMD) treatment of concentrated water from reverse osmosis (RO), membrane fouling is inevitable. To address this, optimization of membrane operating conditions was conducted, and the impact of inorganic, organic, and organic-inorganic composite pollutants on the efficiency of VMD membranes was investigated. The results indicated that the optimal operating conditions for the VMD system were a feed temperature of 70 ℃, a vacuum pressure of 0.09 MPa, and a feed flow rate of 600 L/h. When RO concentrated water was used as the feed liquid, the rate of decline in membrane flux relative to the initial value increased with increasing feed temperature and vacuum pressure, and decreased with increasing feed flow rate. When sodium alginate (SA) was added to the RO concentrated water, the membrane flux relative to the initial value decreases by 67.87%, primarily due to the formation of an organic-inorganic composite fouling layer.
Last Update:
2026-04-01