Activated Carbon Replacement

Adsorption Saturation

When the pores of the activated carbon are filled with adsorbed substances, its adsorption capacity decreases drastically, making it necessary to replace the activated carbon with a new one.

Performance Deterioration

Even if the activated carbon is not fully saturated, its adsorption efficiency may decrease due to the effects of weather, temperature, humidity, etc. Periodic replacement ensures stable operation of the system.

Safety Considerations

In some applications, such as pharmaceutical manufacturing and food processing, periodic replacement of activated carbon can prevent product contamination and ensure product quality and safety.

The following methods can be used to determine if the activated carbon needs to be replaced:

• Time-basedIn some applications, based on experience or manufacturer's recommendation, a fixed replacement cycle, such as every 3-6 months, may be established.
• Based on saturationCalculating the adsorption capacity and total adsorption capacity of the activated carbon, when it reaches a certain saturation level (e.g. 70%-80%), it must be replaced.
• ColorIf the color of the activated carbon turns dark or black, it may have adsorbed too many contaminants and should be replaced.
• OdorIf the activated carbon gives off an unpleasant odor, it may need to be replaced.
• Adsorption capacityThe adsorption capacity of the activated carbon has decreased and may need to be replaced.

Activated carbon filters in household air purifiers are usually replaced every 3-6 months.

Activated carbon filters in drinking water systems may need to be replaced every 6-12 months.

Large industrial activated carbon filtration systems may need to be replaced or regenerated every few weeks or months, depending on the situation.

The method of replacing activated carbon depends on the environment and area of application. In general, activated carbon can be substituted in the following ways:

• Direct replacement: Direct replacement of the activated carbon ensures that the new activated carbon is clean and dry.
• Cleaning and regeneration: Cleaning, backwashing and regeneration of activated carbon will restore its adsorption capacity. However, this method may not work for all types of activated carbon. For example, the powdered activated carbon cannot be regenerated and can only be replaced.

The replacement of activated carbon should be carried out according to your environment and application. If in doubt, consult the relevant professionals.

Regeneration with activated carbon

• Storage conditionsUnused activated carbon should be stored in a cool, dry place to avoid moisture.
• Safe handlingWhen replacing or regenerating activated carbon, appropriate safety measures must be followed to avoid risks to operators and the environment.
• Proper handlingAfter use, the activated carbon should be disposed of in accordance with local regulations to avoid secondary contamination of the environment.