Zero Liquid Discharge for Power Plant Scrubbers

On November 12, 2008, Devesh Mittal and Greg Mandigo made the case for zero liquid discharge as an alternative to the combination of physical and biological treatment.  Three systems are operating at Enel plants in Italy with others under design.  KCPL Iatan 2 will also use ZLD. A number of systems are already used for cooling tower blowdown. Biological systems require dilution to protect the micro organisms.  Also boron and certain other contaminants are not captured in these systems.  Zero liquid discharge achieves the complete prevention of contaminants reaching the wastewater.

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