Effluent Treatment with Metal Precipitants

Metal Removal

  • Simple treatment method even in the presence of metal complexes
  • Efficient and metals removed to low levels
  • Good settlement of solids
  • Stable sludge produced with low leachability of metals
Heavy Metal Removal 1

ADVANTAGES OVER SULPHIDE OR HYDROXIDE PRECIPITATION

  • Metals removed to low concentrations typically <0.1mg/l
  • Metals can be removed even in the presence of complexes
  • Metal removal unaffected by the presence of cleaners
  • Metals can be removed across a broad range of pH
  • Metals precipitated remain insoluble even if pH changes

Applications

  • Plating industry
  • Metal finishing
  • Printed circuit board manufacture
  • Aerospace
  • Automotive
  • Battery manufacture
  • Incineration plant
  • Thermal power plant
  • Waste disposal contractors
  • Polluted groundwater
  • Washing contaminated land/soil
  • Iron and steel manufacture
  • Photographic industry
  • Printing industry
  • Chemical industry
  • Electronics industry

Sulphates

Sulphates can only be precipitated at ambient temperature to between 1500-1800mg/l and in the presence of sodium and potassium ions this is higher and often the limit of solubility is around 2500mg/l.

Water authorities want the sulphate level to be reduced to between 1000-1800mg/l this is so sulphate rich effluents don’t damage the sewer infrastructure.

A novel chemical precipitation method has been developed using the addition of aluminium and calcium. The chemical reaction is accelerated using ultrasound and its efficiency is improved.

The settlement and precipitation of the solid is aided by the addition of Clearflo L1-R  

Our two key products in this range are
ClearFlo L-1R and ClearFlo L-1R (D)

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