The pollution of textile effluents deriving from dyeing or finishing process is due mainly to soluble organics compounds which, after biological treatment maintain almost unchanged their original color.

By addition of the bleaching polymer ETSO 131, inside the biomass of the effluent treatment plant (etp), we obtain the following results :

  • reduction of colour (see photo)
  • decreasing in hard COD (30 to 60 ppm)
  • decreasing in SS
  • improvement of sludges decantation speed, especially with filamentous bacteria

The final sludge amount is not increased by discoloring polymer ETSO 131 addition.

In comparison with traditional ozone process or ozonation, the use of bleaching polymer ETSO 131 is cheaper as well as required investment as its running costs.

Discoloration / Decolorization