Technical assistance: Decolorization of tannery wastewater
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This post was last edited by hesonchang214 on 2011-7-31 07:50. Since the wastewater discharged is light red in color, the environmental protection agency now requires that this color be removed. I wonder if anyone among you knows of any chemical methods that can be used to achieve this; it’s necessary to treat the wastewater from a pool with a capacity of 3,000 cubic meters, and the water in this pool is stationary. If anyone has used or is aware of any effective methods or requirements, please post them here; I would be extremely grateful! ! !
It is possible to first test this in the laboratory by using an oxidizing disinfectant (sodium hypochlorite) to determine the optimal dosage, which can then be applied in the larger tanks.
It’s unclear whether only 3,000 cubic meters of water will be treated, or if a large amount of colored wastewater will be generated subsequently. If there is only 3,000 cubic meters of wastewater, the simplest approach is to use advanced oxidation treatment, as it is fast. Such as iron-carbon microelectrolysis, Fenton oxidation, etc. For iron-carbon micro-electrolysis, all that is needed is to add scrap iron and activated carbon; a mass ratio of 1:3 between iron and carbon is generally sufficient. It is possible to conduct preliminary tests in glassware in the laboratory first. It’s cheap. Fenton oxidation mainly involves the addition of hydrogen peroxide, and the dosage should also be determined through pilot tests. It is also possible to use both methods simultaneously. Hope this can help you
To build a small iron-carbon reactor, it is possible to start with pilot tests to see the results.