Textile water decolorization

At present, chlorine dioxide is primarily used as a bleaching chemical in the pulp and paper industry. It is also used in large amounts by the textile industry, as well as for the aching of flour, fats, oils, and waxes. In treating drinking water, chlorine dioxide is used in this country for taste and odor control, decolorization, disinfection, provision of residual disinfectant in water distribution systems, and oxidation of iron, manganese, and organics. The principal use of chlorine dioxide in the United States is for the removal of taste and odor caused by phenolic compounds in raw water supplies. 

Frijters CTMJ, Vos RH, Scheffer G et al (2004) Decolorizing and detoxifying textile waste-water in a full-scale sequential anaerobic-aerobic system. In Guiot SR, vol 4. IWA Publishing, London, pp 2387-2390... 

Husain Q (2006) Potential applications of the oxidoreductive enzymes in the decolorization and detoxification of textile and other synthetic dyes from polluted water a review. Crit Rev Biotechnol 26 201-221... 

Tokuda, J. Ohura, R. Iwasaki, T. Takeuchi, Y. Kashiwada, A. Nango, M. Decoloration of azo dyes by hydrogen catalyzed by water-soluble manganese porphyrins. Textile Res. J. 1999, 69, 956-960. 

Khan, A. A., Husain, Q. (2007). Decolorization and removal of textile and non-textile dyes from polluted waste-water and dyeing effluent by using potato (Solanum tuberosum) soluble and immobilized polyphenol oxidase. 

The silver-loaded titania photocatalysts possess high activity in the photocatalytic decomposition of ozone [38], photoreduction of various thiols [39], photodestruction of 1,4-dichlorobenzene [40], dehydrogenation and oxidation of alcohols (e.g. of 2-propanole [41,42]), decoloration of textile waste water [43], photokilling of bacteria [44], and others. For additional detailed information on this topic, one can use a number of review articles and books [e.g. 45-48]. 

This study showed that the bacterial cellulose derived fix)m coconut and pineapple juices can be converted efficiently to bacterial cellulose by the supplementation of yeast extract and ethanol under static fermentation conditions at 30 °C. Bacterial celluloses produced from all strains are growth associated products. Coconut juice seems to be a better substrate than pineapple juice. In view of energy consumption, the productivity of BC on this medium is high, which makes the production costs lower than expected. It is also clear that different A. xylinum strains produce different BC content levels under the same inoculation volumes and under static cultivation conditions. These results suggest that bacterial cellulose pellicles of all strains appear to be easily applied to use in many applications such as food, paper, and textile industries, without requiring additional steps of decolorization and purification. Furthermore, the properties of cellulose, in tenns of crystallinity, high water-absorption capacity, and mechanical strength of the reported strains, have additional applications in cosmetics and medicine. 

The focus of this chapter is to review reported research on possibilities and challenges for reclamation and re-use of the chemical waste commonly generated by textile processes. Waste water purification and decolorization is discussed in Chapter 7. 

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