Hello Mr Chris Your question ...

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Hello Mr Chris

Your question is not clear what do you want to achieve? You have to provide source of water type of industry you want to deal with. COD is a VAGUE terminology, you have to clarify where you want to use the water after treatment.

Biological treatment can be enhanced digesting the residual organic matter by dosing right bacteria culture for FOG. In the grease trap or ahead of the trap.  

Ozone can be injected 0.4% at the last for complete disinfection.

Any further clarifications please contact Amdy. mtplimited@gmail.com