Abstract
The objective of this work was to study the possibility of reuse of effluent in continuous dyeing of 100% cotton. Were made five dyeing, four with reactive dyes and one with fluorescent brightener, using the same bath after treatment by advanced oxidation process (AOP) by UV/H2O2. The efficiency results were higher than 85 % in all cases allowing total reuse of the effluent. The dyeing made with treated effluent were compared against dyeing made with water, with values of deviations smaller than 1.10. Based on these results and working with 1:10 liquor ratio, the consumption of water for a monthly production of 100 tons would be about 8,000 m3. The same dyeing made with treated effluent, adding approximately 10 % loss by evaporation, would spend only 88 m3, which represents a monthly saving of water around 7,912 m3.
