Abstract
The industrial process of reactive dyeing of cotton is a sequence of several operations. Different types of surfactants were used several times during the dyeing process; anionic, nonionic, and cationic. The dyeing effluent is heavily charged with pollution especially color and salt. In a treatment at source approach, the dyeing effluent was isolated and then mixed with the other baths containing surfactants. A combined treatment involving microfiltration (MF), as pretreatment followed by nanofiltration (NF) as mean treatment, was investigated. The mixing of the dyeing bath with another effluent showed 100% of MF flux improvement, but the color retention still higher for the single dyeing bath. The NF treatment produces a completely discolored effluent with 100% of suspended solids retention, while the chlorides removal did not exceed 50%.
Published Version
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