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1. 1. Treatment of Spent Pickling Acid from Stainless Steel Production : A review of regeneration technologies with focus on the neutralisation process for implementation in Chinese industry

   University essay from KTH/Industriell ekologi

   Author : Lena Dahlgren; [2010]
   Keywords : acid regeneration; acid neutralisation; pickling waste water treatment; environmental effects of stainless steel production; nitrate reduction; High Density Sludge process; HDS process; syraåtervinning; neutralisering; behandling av avlopp från betning; denitrifiering; miljöeffekter av stålproduktion; High Density Sludge process; HDS;

   Abstract : Pickling is a unit operation within stainless steel production, which means treating the steel with hydrofluoric acid (HF) and nitric acid (HNO3), also called mixed acid. The whole process generates waste water streams which have to be treated before released to recipient. READ MORE