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Seeking effluent treatment technology for alkaline rust stripper containing sodium gluconate, Na-EDTA. and propylene glycol methyl ether

Seeking effluent treatment methods for treating :

1) Alkaline antirust wastewater containing sodium gluconate, tetrasodium EDTA, NaOH, Na₂CO₃ for ferrous materials cleaning.
2) Alkaline waste cleaning solution containing sodium metasilicate, polypropylene glycol methyl ether for aluminium and magnesium materials.

Thanks,

Kajal Kanti Das
pollution analyst consultant - Kolkata, West Bengal, India
2003

A common treatment is low-pH saturation with a light metal. Drop the pH to about 2.0, load up the solution with calcium chloride or magnesium sulphate, then raise the pH to precipitate the heavy metals.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2003

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