Effects of gas introduction and the addition of a gas distributor on ultrafiltration of PVA solution in a multi-channel membrane module were investigated experimentally in this work. Experimental results show that the introduction of gas enhances the permeate flux of ultrafiltration operated at a lower liquid velocity. The addition of a gas distributor can improve the sparging of gas in the liquid stream and further enhance the permeate flux. A well distribution of gas between the channels is important in a multi-channel membrane module. The use of a 30 mum pore size gas distributor is effective in reducing the filtration resistance and increasing the permeate flux of PVA recovery by ultrafiltration. [References: 12]
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