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Forward osmosis membrane fouling and cleaning for wastewater reuse
- Source :
- Journal of Water Reuse and Desalination, Vol 7, Iss 2, Pp 111-120 (2017)
- Publication Year :
- 2016
- Publisher :
- IWA Publishing, 2016.
-
Abstract
- Membrane fouling properties and different physical cleaning methods for forward osmosis (FO) and reverse osmosis (RO) laboratory-scale filtration systems were investigated. The membrane fouling, with respect to flux reduction, was lower in FO than in RO when testing an activated sludge effluent. Cross-flow velocity, air-scouring, osmotic backwashing and effect of a spacer were compared to determine the most effective cleaning method for FO. After a long period of fouling with activated sludge, the flux was fully recovered in a short period of osmotic backwashing compared with cleaning by changing cross-flow velocity and air-scouring. In this study, the osmotic backwashing was found to be the most efficient way to clean the FO membrane. The amount of RNA recovered from FO membranes was about twice that for RO membranes; biofouling could be more significant in FO than in RO. However, the membrane fouling in FO was lower than that in RO. The spacer increased the flux in FO with activated sludge liquor suspended solids of 2,500 mg/L, and there were effects of spacer on performance of FO–MBR membrane fouling. However, further studies are required to determine how the spacer geometry influences on the performance of the FO membrane.
- Subjects :
- Forward osmosis
Backwashing
Filtration and Separation
02 engineering and technology
010501 environmental sciences
01 natural sciences
Biofouling
lcsh:Water supply for domestic and industrial purposes
020401 chemical engineering
spacer
0204 chemical engineering
Reverse osmosis
0105 earth and related environmental sciences
Water Science and Technology
lcsh:TD201-500
Fouling
membrane fouling
Chemistry
forward osmosis
Membrane fouling
Environmental engineering
Pulp and paper industry
Membrane
Activated sludge
cross-flow velocity
air-scouring
osmotic backwashing
Subjects
Details
- ISSN :
- 24089370 and 22201319
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- Journal of Water Reuse and Desalination
- Accession number :
- edsair.doi.dedup.....747103f477894c3ebce8bfa0bad9717e