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1. Conventional" continuous physico-chemical treatment
The general processing flow chart is shown in figure 1 . The main processing stages are :
storage ;
any pre-treatments (de-oiling of degreasing effluents, reduction of chromium VI ions, oxidation of cyanide anions);
metal ion neutralization/precipitation ;
flocculation if necessary;
solid/liquid separation ;
sludge treatment ;
any liquid refining treatments;
effluent controls.
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Conventional" continuous physico-chemical treatment
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Ministerial order of September 26, 1985.
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