Diatomaceous earth and perlite filter aids are two commonly used filtration auxiliary materials with good chemical stability, resistance to acids and alkalis, and suitability for various chemical environments. They are widely used in industries such as food, pharmaceuticals, chemicals, and water treatment. Due to their different characteristics, their application scenarios also vary.
| Property |
Diatomaceous Earth |
Perlite |
| Density |
Low density, but slightly heavier than perlite. |
Extremely low density, very lightweight. |
| Filtration Precision |
High filtration precision, suitable for removing tiny particles and colloids. |
Medium filtration precision, suitable for medium-viscosity liquids. |
| Applicable Liquids |
Suitable for various liquids, including high and low viscosity liquids. |
More suitable for medium-viscosity liquids. |
| High-Temperature Resistance |
Good high-temperature resistance, suitable for high-temperature environments. |
Moderate high-temperature resistance, suitable for room or medium temperatures. |
| Price |
Relatively higher price compared to perlite. |
Lower price. |
Advantages and Disadvantages of Diatomaceous Earth Filter Aids
Advantages:
- High filtration precision: Effectively removes tiny particles and colloids, suitable for high-precision filtration needs.
- Wide applicability: Suitable for various liquids, including high and low viscosity liquids.
- High-temperature resistance: Good performance in high-temperature environments.
- Chemical stability: Chemically stable, resistant to acids and alkalis, suitable for various chemical environments.
Disadvantages:
- Higher price: Slightly more expensive than perlite.
- Higher density: Although low in density, it is slightly heavier than perlite, which may cause minor inconveniences in transportation and handling.
Advantages and Disadvantages of Perlite Filter Aids
Advantages:
- Lightweight: Extremely low density, very lightweight, easy to transport and handle.
- Cost-effective: Lower price, more economical.
- High filtration efficiency: Porous structure significantly improves filtration speed and reduces resistance.
- Environmental friendliness: Natural mineral, non-toxic, harmless, and biodegradable.
Disadvantages:
- Medium filtration precision: Suitable for medium-viscosity liquids, with lower precision compared to diatomaceous earth.
- Moderate high-temperature resistance: Not as resistant to high temperatures as diatomaceous earth, suitable for room or medium temperatures.
In practical applications, the choice of filter aid should be based on specific filtration requirements, liquid properties, filtration precision needs, and budget considerations.
