Fouling studies and mathematical modelling of ultrafiltration of textile desizing effluents

A B S T R AC TOne of the most signifi cant environmental diffi culties arising in textile industry is that of the rejection of water with great chemical load in important quantities, and one of the steps that generate pollution by increasing the COD of the textile industry effl uent is the desizing step. Thus, the use of methods, which need weak chemical addition, such as ultrafi ltration combined to a targeted selection of the sizing agents enables to reduce signifi cantly the environmental impact of the desizing step of textile treatment engineering. Moreover, the wastewater rejected after the stage of desizing contains of valuable materials such as the carboxymethylcellulose and the poly(vinyl alcohol), which do not undergo notable changes in their physical properties nor their chemical properties during the processes of sizing and desizing. In fact, these two water-soluble polymers are more and more massively used in textile industry to replace the starch, which remains the most used natural sizing agent. The main objective of this paper is to expose experimental results obtained for several ultrafi ltration polyethersulfone membranes employed in the removal of poly(vinyl alcohol) and carboxymethylcellulose from aqueous solutions, and to discuss the effi ciency of enzymatic degradation of carboxymethylcellulose applied to treat the obtained ultrafi ltrate and as well to clean the fouled membranes.

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Laboratory investigation of using and fouling and cleaning of polyethersulfone membranes employed in the removal of carboxymethylcellulose and poly(vinyl alcohol) from aqueous solutions

Belazzougui

Mimoune

Daoud

et al. 2011

Desalination and Water Treatment

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Fouling studies and mathematical modelling of ultrafiltration of textile desizing effluents

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Laboratory investigation of using and fouling and cleaning of polyethersulfone membranes employed in the removal of carboxymethylcellulose and poly(vinyl alcohol) from aqueous solutions

Laboratory investigation of using and fouling and cleaning of polyethersulfone membranes employed in the removal of carboxymethylcellulose and poly(vinyl alcohol) from aqueous solutions

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