Abstract

SOLIS, M. et al. The sedimentation process a simple method to diminish contaminants in textile effluents. Rev. Mex. Ing. Quím [online]. 2013, vol.12, n.3, pp.585-594. ISSN 1665-2738.

The textile industry is considered one of the most: polluting because U uses large amounts of chamcal compounds and water. We analyzed the micro and small textile firms from Tepetitla of Lardizabal in Tlaxcala, engaged in the textile finishing of jeans. The most common processes are waihing, softening, rinse, stone and dyeing. The analysis of the wastewaters from the different process did not match with the parameters established at trie NOM-002-ECOL-1996. Those from dyeing had the higher values in electric conductivity because of the sodium chlorine used. We observed that, except for dyeing, the sedimentation as a pre-treatment is a viable and economic option to diminish the color and COD until 70% in a simple way, besides the pre-treated water can be recycled or reused in another process which could use not clean water. The phytotoxicity assay showed that the effluents from dye process were highly phytotoxic, those from rinse and softening process were phytotoxic, and those from washing and stone process were no phytotoxic.

Keywords : sedimentation; textile effluent; dye; denim; textile finishing.