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  1. harbor

    ORP Control for Metal Removal with Sulfides

    m777182, Thanks for your input - it will help.
  2. harbor

    ORP Control for Metal Removal with Sulfides

    I'm looking for verification of an explanation that was given to me regarding the use of an ORP Controller to feed a sulfide (NaHS, DTC, etc.) to remove metals. I'm aware that ORP measures the Oxidation/Reduction Potential, so using an ORP Controller to feed bleach or metabisulfite to a...
  3. harbor

    ORP Control for Metal Removal with sulfides

    ACHRISTIDE, Thanks for your response. The proportional pump set-up makes sense except I worry that the dissolved metal concentration in the untreated waste water changes at various times (e.g. 9AM - Cu=10 ppm, 11AM - Cu=0.5 ppm, 3PM - Cu=35 ppm). The OPR meter is hyped as a cure to metal...
  4. harbor

    ORP Control for Metal Removal with sulfides

    I'm looking for verification of an explaination that was given to me regarding the use of an ORP Controller to feed a sulfide (NaHS, DTC, etc.) to remove metals. I'm aware that ORP measures the Oxidation/Redcuction Potential, so using an ORP Controller to feed bleach or metabisulfite to a...
  5. harbor

    fluoride removal

    We also have a similar problem with fluoride, so I'd like to tag onto this thread as it starts. The application is for a mine in the Western US. The groundwater is removed from the mine pit to keep it dry - then the groundwater is discharged in another location after it meets local limits...
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