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  • Waste acid / Waste alkali
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Waste acid / Waste alkali

As a kind of hazard waste, waste acid refers
to acid with a pH of 2.0 or below from all kinds
of waste acid liquids from business activities,
while waste alkali refers to alkali with a pH of 12.5
and above from the alkali liquids. Waste acid and
alkali are treated through a process of
neutralization and dehydration.

Waste acid

Inorganic waste acids including sulfuric acid, hydrochloric acid, nitric acid, hydrofluoric acid, and phosphoric acid, and organic waste acid such as acetic acid and citric acid

Waste alkali

Carbonate of sodium or potassium, phosphate, ammonia, and amine

Treatment procedure

  • Flow adjustment facility – Adjust the supply amount of waste acid and waste alkali and put it into a reaction facility.
  • Reaction (neutralization) facility – React waste acid and waste alkali with chemical process (calcium hydroxide) and neutralize.
  • Dehydration – Dehydrate neutralized waste fluid and implement consigned treatment for the resulting sludge in the process
    and sludge wastewater.

Relevant subsidiary