Carlos, There is an ...

Carlos,

There is an effective process to remove the recalcitrant color from black liquor and bleach effluent. The process cleaves the chromophores from the polyphenol molecule. The color does not return. COD/BOD values are also substantially reduced in the process.

Biological oxidation system often increases true and apparent color content as the waste is process. Biological systems reduce the molecular weight of the molecule often making the resulting polyphenol sister molecule more recalcitrant in the effluent and in the environment. Sample testing for color indicates substantial increases as the effluent pass through a biological process such as an aeration stabilization basin.

Ozone technologies works however the systems exhibit high Capex and Opex costs due to the high biological concentrations and high mass volumes in the discharge.

Cheers,

Philip Kemp

Mason Kemp Associates – On LinkedIn