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Textile Waste Water
Ozone Treatment

  1. Managing Director

Textile processing with Ozone systems are absolute necessary.

Ozone systems can be used as bleaching for brightening of yarn or fabrics where currently chemicals are used which are not only harmful but also energy intensive process. Also ozone systems treat process waste water generated by disinfecting, decolorizing, deodorizing, decreasing sludge content all in one

Ozone based treatment gives solution to these problems by simultaneously    replacing conventional treatments where toxic chemical are used. Ozone systems maintains clean environment  by controlling water  pollution caused due to textile treatment and also cuts cost to an great extent in form of reduced man power and investment on toxic chemicals.

 Ozone Advantages & Benefits

  1. Bleaching Agent
    Ozone is an excellent bleaching agent due to its decolorizing property it brightens the fabric without added chemicals
  2. Biorefractory
    Ozone converts biorefractory compounds present in textile waste water into bio degradable products
  3. Color Removal
    Increased ozone concentration results in breaking the dissolved organic dye compounds which results in color removal
  4. Turbidity
    Abrasive nature of ozone results in reduction of turbidity and sludge content in waste water
  5. COD & BOD
    Lower COD and BOD values in final treated effluent waste water
  6. Toxic Chemical
    Dye color removal by ozone completely eliminates use of toxic chemical like coagulants, etc.,
  7. Odour
    Eliminates odour associated with textile effluents.
  8. Cost Effective
    Cost effective and eliminates use of harsh chemicals and its handling which results in destruction of ecology
  9. Eliminates
    Eliminates costly multiple filtration techniques

How to remove dye from textile industry wastewater with ozone

With high concentration ozone it is possible to break down the dissolved organic dye compounds and thereby reduce the amount of colour and enhancing the biodegradability of the wastewater. The most efficient way to remove dissolved dye is using a combination of biology, filtration and ozone.

Ozone has been used  successfully for removal of colour from textile wastewater streams in plants around the world as well as in other industrial wastewater processes.  In wastewater treatment, ozone is often used in conjunction with  biological treatment systems such as activated sludge.  Organic dyes are mostly refractory due to their large molecular size and they can not be easily removed by adsorption on activated sludge.  In some cases ozone has been used before the

biological process, but mainly after biological treatment.  If the wastewater is hardly biodegradable or toxic, activated sludge pre-treatment is an option. In textile wastewater processes, a 20-30% improvement in the action of the biological system has been observed.

Ozone is effective in removing the colour from all dyes used in textile processing.  The amount of ozone can vary depending on a number of factors: how much colour was removed in the biological process, the type of dye used, where ozone is applied in the process, etc.  Knowing the proper amount of ozone required to meet the colour removal objective for the receiving water body is critical to the economics of the ozone system.  In general it is not easy to predict the amount of ozone required, so in virtually all cases where specific previous experience is not available, pilot testing is employed.

About 1 mg Ozone per mg dye is required to achieve 95% colour removal, although this ratio varies by dye type.  The ratio increases to about 1.5 for 100% removal. Reaction times were on the order of 10 minutes.  In the textile industry a typical dosage might be 15 mg/l post biological treatment, but the levels could easily reach 25 mg/l.  It is important to note that the ozone dose only needs to make the dye compound uncoloured and not necessarily completely mineralize the material.