Dear Mohammed, I have seen ...

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Dear Mohammed,



I have seen the photos you sent and it seems to me that the two Krofta type DAFs you are using are over loaded or more easily that the chemicals dosage is not efficient.

The elimination of the soluble organic substance is done in most cases biologically.

In your case with a COD of 3700 mg / l and probably with a water temperature above 35 ° C I recommend the anaerobic biological treatment.

A UASB plant, widely used in the paper mill, has no problems in reducing COD below 800 mg / l, has low management and maintenance costs, low sludge production and does not require nutrients.

The investment cost is high, but if biogas is recovered, the cost / benefit ratio is certainly attractive.



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