Edible Oil and Food Processing Filtration removes suspended solids, gums, waxes, catalyst fines and other impurities from oils, fats, syrups and liquid food products. It offers clarity, stability and compliance with food safety standards while protecting downstream equipment.
Process where It’s Needed:
- Crude oil refining: Degumming and bleaching removes gums, foot and impurities.
- Bleaching and deodorising: Prevents rapid fouling of the beds of bleaching earth and activated carbon.
- Winterisation Traps waxes and stearins to prevent cloudiness in cold storage.
- Syrup and liquid food processing: Removes particles, fibres and undissolved solids from juices, sauces and sweeteners.
Types of Pollutants:
- Suspended solids and dirt
- Gums, phosphatides, and mucilaginous matter
- Waxes and stearins
- Catalyst fines (nickel, palladium)
- Bleaching earth and carbon fines
- Proteinaceous matter and fibers
- Metal particles and rust
Problems in Filtration Process:
| Issue | Cause | Impact on the Process | How Filtration Helps |
|---|---|---|---|
| Cloudy Oil | Waxes, gums, and fine solids | Poor appearance, reduced shelf life, and customer rejection | Removes cloud-causing particles for bright, stable oil |
| Premature Bed Blinding | Fine solids and gums | Shortens the life of bleaching earth and carbon beds | Protects adsorption media and extends their efficiency |
| Equipment Wear | Abrasive catalyst fines and metal particles | Damages pumps, valves, and piping | Captures hard particles before they cause abrasion |
| Filter Aid Consumption | High solids load | Increases filter aid usage and disposal cost | Reduces solids load and improves filtration efficiency |
| Product Contamination | Foreign particles and fibers | Fails food safety standards and quality checks | Ensures compliance with hygiene and purity requirements |
| Reduced Throughput | Plugged filters and lines | Slows production and increases downtime | Maintains consistent flow and reduces interruptions |
Why this matters:
- Improves product clarity, stability and shelf life.
- Protects downstream equipment e.g. bleaching, deodorising and filling systems.
- Increases the lifetime of the adsorbent (bleaching earth, carbon) and catalyst.
- Reduces waste and rework by delivering consistent quality.
- Helps ensure compliance with food safety and regulatory requirements.