Effect of ozonation for reducing membrane-fouling in the UF membrane

Ozonation as a pretreatment for nanofiltration: Effect of oxidation pathway on the permeate flux

“…Many bench-scale and pilot studies have been performed to elucidate the impact of ozonation -alone or in combination with other pretreatment processes -on the flux performance of polymeric UF [8][9][10][11][12][13][14] and NF [13,[15][16][17][18][19][20][21][22] membranes. Feed waters included natural surface water [8,[13][14][15]19], wastewater treatment plant effluent [9][10][11]17], dairy wastewater [18], and landfill leachate [22] among others.…”

“…Feed waters included natural surface water [8,[13][14][15]19], wastewater treatment plant effluent [9][10][11]17], dairy wastewater [18], and landfill leachate [22] among others. In some cases, ozonation was found to be effective in reducing UF and NF membrane fouling [9][10][11]13,14,18,19] while in other studies no improvement in the permeate flux due to pre-ozonation was observed [8,[15][16][17]21,22]. These differences were likely due to the complex dependence of fouling behavior on study-specific process parameters: feed water chemistry, O 3 dosage, additional pretreatment steps [12,23], membrane surface chemistry, presence of microorganisms and biopolymers in the feed, and membrane type (UF versus NF).…”

Methods Employed for Control of Fouling in MF and UF Membranes: A Comprehensive Review

“…It was concluded that the flux rate increased by about 12% as the ozone input increased. It was also realized that ozonation did not have a significant role to prevent membrane fouling, and it made the permeate flux increase, but ozone and hydrogen peroxide was more effective (28).…”

Highly Efficient Purification of Finely Dispersed Oil Contaminated Waters by Coagulation/Flocculation Method and Effects on Membrane Filtration

“…Microfilters have relatively higher fluxes compared to ultrafiltration, but the latter results in higher purification efficiency. To reduce fouling, highly hydrophilic membranes [25,31,32] can be used (in case oil in water emulsions), or membrane separation can be combined with other methods such as gas injection [33], ozonation [34,35] or destabilization [5,36]. In the recent study of M. Matos et al [5] destabilization/centrifugation/ultrafiltration hybrid process was applied with high efficiency (97.4%) to purify oil in water emulsion, using calcium chloride coagulant and ZrO 2 ceramic ultrafilter (300 kDa) membrane.…”