Ozonation high membrane filtration flux

Effects of Membrane Filtration Method on Membrane Filtration Flux Figure 5.12 shows the changes in ozone dosage, dissolved ozone concentration of MF permeate, and membrane filtration fluxes when ozone was injected with an ejector and water was filtrated with cross-flow (Run 11) and dead-end (Run 12) methods. Membrane filtration flux for the dead-end method was higher than that of the cross-flow method, and high membrane filtration flux operation (about 6 m /m /day) was achieved with 3 mg/L ozone dosage. 

Based on these results, by controlling ozone dosage to have dissolved ozone concentration of MF permeate at around 1 mg/L, continuous high membrane filtration flux operation could be maintained for about 3 months even during the low water temperature period and the high turbidity period. 

A unique membrane filtration system using ozone for high permeation flux... 

In addition, we have designed a new filtration system using our new ozone-resistant MF module in conjunction with ozone (Hashino et al., 2000). In this system, filtration was carried out at low pressure and low linear velocity and with air scrubbing to remove cake layer on the membrane. This system can provide a high permeate flux consistently for various types of water, especially as in the case of highly turbid raw water and secondary treated municipal wastewater. 

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