QIE Group provides high-performance sterilization systems, from traditional horizontal batch units to modern continuous technology, engineered for 24/7 industrial operation.
Sterilization Process
The sterilizer uses saturated steam in a multi-stage cycle:
- Air Evacuation: Removes air from the vessel to prevent oil oxidation.
- High-Pressure Steaming: Operates at 3.0 bar and 145°C to inactivate lipase enzymes, keeping FFA levels low, and softening the fruit mesocarp to improve oil extraction.
- Pressure Discharge: Rapid release causes an expansion effect, separating the fruit from the bunches and preparing the kernels for downstream processing.
Technical Objectives of Sterilization
| Objective | Function |
| Lipase Inactivation | Destroys enzyme activity to halt FFA development, meeting premium export standards |
| FFA Control | < 3% |
| Structural Softening | Breaks down spikelet-to-bunch attachment, ensuring near-zero unstripped bunch (USB) loss |
| Mesocarp Conditioning | Increases fruit pulp permeability for higher oil extraction |
| Kernel Detachment | Dehydrates nut to shrink kernel, preventing breakage during cracking |
QIE Sterilization Solutions
Horizontal Sterilizer — Industry Standard for Large Mills
The horizontal cylindrical vessel is the most proven configuration for large-scale operations (20–120 TPH).
Vertical Sterilizer — Space-Saving & Automated
Designed for mills with limited footprint or those seeking to reduce material handling overhead.
| Feature | Horizontal Sterilizer | Vertical Sterilizer |
| Equipment Required | Cages, rail cars, tracks, winches | None |
| Facility Investment | Higher | Lower |
| Operational Maintenance | Higher | Lower |
| Labor Intensity | High | Low (automated) |
| Steam Distribution | Uniform (with condensate management) | Uniform |
| Oil-Water Leakage | Possible | Prevented |
| Workshop Environment | Standard | Clean, green manufacturing ready |
| Automation Level | Limited | Fully compatible |
| Ideal Capacity | 20–120 TPH | Medium capacity/ space-constrained |
