Thus, residual unfixed chemicals increase pollutant loads in textile wastewaters. The textile wastewaters
are highly variable in their composition and contain unfixed dyes, dyeing auxiliaries, inorganic salts, and other chemicals used
to improve adherence to the fibers (Karci, 2014). They are characterized by high color, chemical oxygen demand (COD) and salt/conductivity content (Tanapongpipat et al., 2008)