Applicability Limitations

This process has extremely wide application to aqueous and nonaqueous liquids, slurries, and sludges. Some applications include pickle liquors, plating wastes, mine drainage, and oil emulsion breaking. The treated stream undergoes essentially no change in physical form, except precipitation or gas evolution.

The process should be performed in a well-mixed system to ensure completeness (Figure 11.15.8). Compatibility of the waste and treatment chemicals should be ensured to prevent formation of more toxic or hazardous compounds than were originally present.

Status. This is a common industrial process.

FIG. 11.15.8 Simultaneous neutralization of acid and caustic waste.

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