Colour Removal

Our Nyex Ellenox process is proven at colour removal from wastewater to trace levels, but we always test your water against both processes to determine the best solution for you.

Learn more See our products

Colour contamination in wastewater has serious environmental consequences which can directly impact your business.

Removing Colour from Wastewater

Organisations are under increasing pressure to meet strict discharge and trade effluent regulations with the fear of incurring heavy fines. These regulations include restrictions on the colour of water being discharged.

Manufacturing facilities that have failed to treat contaminated discoloured wastewater have also been subject to negative press which has caused reputational damage, impacting upon customer loyalty. From a different viewpoint, drinking water supplied by local utilities is also directly impacted by colour as consumers demand an aesthetically pleasing clear supply at all times.

Employing water treatment methods which effectively remove colour from water and wastewater, can not only help to avoid fines, but can also save money by allowing wastewater to be reused during manufacturing processes.

What are the causes of colour in wastewater?

Colour contamination in wastewater has serious environmental consequences which can directly impact your business.

Natural dissolved organics
Humic and fulvic acids, natural tannins along with synthetic chemical dyes.

Manufacturing processes
Not only can colour affect the aesthetic value of water, if coloured wastewater is discharged to nature, photosynthesis activity is limited which is proven to cause detrimental effects on aquatic ecosystems.

Learn how Arvia products can help

Nyex Rosalox

Learn more >

Nyex Ellenox

Learn more >

See our solutions

Colour concentration in wastewater

Businesses that use water in their manufacturing processes have a responsibility to ensure that any water discharged into the environment or local sewer has been treated and meets discharge regulations or directives. To do this, colour concentration levels must be monitored.

Colour in water is measured in Hazen Units (HU) or Platinum Cobalt Units (PCU). There are standards which provide guidance on the safe level of colour in discharged waters.

By implementing an advanced onsite treatment process to remove hard-to-treat dyes and colour causing chemicals, you will avoid regulatory fines and reputational damage.

How to remove colour from wastewater

Coloured wastewater is extremely variable in composition due to the amount of dyes or chemicals used in processing and can have a complex structure which is resilient to light, biological or UV treatments.

Arvia’s onsite Nyex™ systems preferentially remove even the most persistent colour using advanced oxidation.

Various industries can benefit from the low maintenance treatment system including utilities for the treatment of source water streams which can contain colour-causing natural organic matter. As well as wastewater streams from pulp and paper manufacture, food and drink processing and textile production.

The systems are carefully designed by our industry experts and can be applied as a standalone treatment process or retrofitted into an existing treatment train to remove the most persistent of colour as a final treatment step.

Contact Us Today To Get Started…

Case Studies

CASE STUDY: Removal of Chemical Dye from Textile Wastewater

Reduction of colour from 1755 Pt-Co Apparent to less than 150, visually completely removed.

CASE STUDY: Remove Colour and COD from Tea Wash Water

Safe discharge enabled by reducing COD to 31 mg/L and removing all colour from effluent.