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Chrome & paint Effluent Treatment



February 1, 2012

Q. Dear Sir,

Myself Jugdev Singh from India, we are treating Chrome plating effluent. Method:

We convert hexavalent to trivalent Cr at a low pH using sodium metabisulfite. Then we precipitate the trivalent Cr using lime at a pH of around 8.5 to 8.7.

In other tank we treat Paint shop effluent by adding lime + agitation 30 min + H2SO4 + Polyelectrolyte, then Settle down.

When we mix the treated Effluent it turns into black Colour.

Please Suggest me any better way.

Many Thanks in advance

Jugdev Singh
Manager - Gurgaon, India


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