Powdered activated carbon is mainly used to remove odors, color, and organic pollutants from water, and is particularly suitable for dealing with sudden water pollution and seasonal water quality deterioration.
🧹 What it mainly purifies
Odors: Quickly adsorbs earthy and musty smells, often used in emergency treatment during algal blooms.
Organic pollutants: Effectively removes COD, pesticides, disinfection byproduct precursors, and some synthetic organic matter.
Other impurities: Also has a good removal effect on color, iron, manganese, and heavy metals such as mercury and lead.
💧 How to add it
Addition location: Usually before coagulant, ensuring 10-30 minutes of contact time to avoid flocculent formation affecting the effect.
Dosage: Generally controlled at 5-50 mg/L, the specific dosage needs to be determined through experiments based on the degree of pollution of the raw water.
Dosage Method: Dry or wet dosing (prepared as a carbon slurry) is available. Wet dosing reduces dust pollution and provides a better operating environment.
⚖️ Advantages and Disadvantages
Advantages: Quick results, low infrastructure investment, strong adaptability to water quality changes, suitable for temporary or seasonal use.
Limitations: Difficult to regenerate after single use, increases sludge production, and can easily generate dust if not handled properly.
Applications: Widely used in emergency purification in waterworks and PACT (Enhanced Biochemical Treatment) processes in wastewater treatment plants.
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