In my process by product heptahydrate sodium acetate found in dissolve form in water & get Higher COD value after chlorination so, how to reduce COD ?
So you still need further treatment, or you can change chlorination with other methods because chlorination by products residual cause this higher COD
https://www.finishing.com/72/45.shtml
Level of COD in water often correlate with organic material concentration.You can reduce concentration of heptahydrate sodium acetate in water by ozone oxidation.
http://antoine.frostburg.edu/chem/senese/101/glossary/f.shtml
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