COD Reduction

Your Challenge

Regulators stipulate strict limits of COD for water to be discharged to sewers or the environment.

Failure to comply with regulation can result in a loss of permit, operational downtime, limited production volume and severe fines. By adopting a wastewater treatment process which has the ability to remove trace levels of organics, you can meet regulation and prove commitment to the protection of the environment.

Primary and secondary treatment remove around 75-85% of the COD, but the hard-to-treat COD remains. Typically, legislation for COD discharge is from below 120ppm in the EU to below 50ppm in China so in order to meet regulatory standards, additional treatment is often required.

Chemical Oxygen Demand (COD) is used as a measure of organic pollutants in water and is expressed in milligrams per litre (mg/L) or parts per million (ppm).

Our Solution

Arvia’s on site Nyex™ Treatment System provides a successful treatment solution for reducing COD for numerous industries worldwide. It can be retrofitted into an existing treatment train to remove the remaining hard-to-treat COD or as a standalone treatment, dependant on removal requirements. The system uses between 10 to 20 kWh/kg* COD power due to the targeted nature of the treatment process.

Nyex™ treated wastewater can also be safely reclaimed and reused for other purposes within the business, saving money and addressing high water demands in times of shrinking supplies.


* all ranges supplied are based on treatment experience and values are to be validated for each individual project following an in-depth treatability trial.

COD Reduction

Arrange a trial

Arrange a treatability trial on your wastewater to prove how a Nyex™ Treatment System can reduce COD, even at trace level.

Arvia Technology Ltd

Safer water for future generations


Get in touch to discuss your water or wastewater treatment challenge today.