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Advanced Oxidation Process, The latest COD Reducing Method AOP is the latest technology that is able to reduce the COD value of the wastewater. Even of COD with a value above 100 thousand though.
How to reduce COD in wastewater. Primary and secondary treatments remove around 75-85% COD, but the hard-to-treat COD remains. Typically, legislation for COD discharge is from below 120 mg/L in the EU to below 50 mg/L in China and therefore in order to meet regulatory standards, additional treatment is often required.
