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- Title
Fouling of reverse osmosis membranes by cane molasses fermentation wastewater: detection by electrical impedance spectroscopy techniques.
- Authors
Cen, Jie; Kavanagh, John; Coster, Hans; Barton, Geoff
- Abstract
The electrical impedance as a function of frequency (electrical impedance spectroscopy [EIS]) of both clean and fouled reverse osmosis (RO) membranes was monitored under osmotic pressure- driven conditions to introduce a water flux through the membranes. RO membranes were fouled using a pilot-scale facility with cane molasses wastewater. Fouling was revealed via a diffusion polarization layer observed below 100 Hz. This fouling layer contained both reversible and irreversible parts. The fouling component that was irreversible contributed mainly to the EIS spectra in the frequency range of 0.01-0.1 Hz, while the reversible fouling component dominated in the range of 0.1-100 Hz. Results presented demonstrate that electrical impedance spectroscopy is able to quantitatively measure real foulants on the surface of RO membranes.
- Subjects
FOULING; IMPEDANCE spectroscopy; REVERSE osmosis (Water purification); ARTIFICIAL membranes; FERMENTATION; SEWAGE; MOLASSES
- Publication
Desalination & Water Treatment, 2013, Vol 51, Issue 4-6, p969
- ISSN
1944-3994
- Publication type
Article
- DOI
10.1080/19443994.2012.714657