Background
A beverage manufacturer producing low-alcohol distilled spirits encountered turbidity issues during storage and low-temperature conditions. The customer aimed to improve product clarity while maintaining flavor characteristics and ensuring stable appearance throughout the distribution process.
Challenge
The product showed noticeable haze formation under low-temperature storage conditions, affecting its visual quality and market acceptance. The customer required an effective filtration solution capable of:
- Reducing turbidity levels
- Improving product clarity
- Maintaining stable appearance during cold storage
- Achieving efficient filtration performance
Filtration Trial
Great Wall Filtration conducted laboratory-scale filtration trials using different depth filter sheet grades.
Test Conditions
- Product: Low-Alcohol Distilled Spirit
- Laboratory Temperature: 20°C
- Filtration Equipment: Plate and Frame Filter
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Evaluation Parameters:
- Turbidity Reduction
- Filtration Flux
- Low-Temperature Stability
Filter Media Evaluated
| Filter Grade | Micron Rating |
| SCP-337 | 0.2–0.3 μm |
| SCH-690 | 0.1–0.2 μm |
Results
SCP-337 (Room Temperature Filtration)
- Initial Turbidity: 0.21 NTU
- Final Turbidity: 0.18 NTU
- Filtration Flux: 59.78 L/m²/min
SCP-337 (Low-Temperature Sample Filtration)
- Initial Turbidity: 9.69 NTU
- Final Turbidity: 0.12 NTU
- Filtration Flux: 44.35 L/m²/min
SCH-690 (Room Temperature Filtration)
- Initial Turbidity: 0.21 NTU
- Final Turbidity: 0.12 NTU
- Filtration Flux: 44.00 L/m²/min
Conclusion
The filtration trials demonstrated that Great Wall Filtration depth filter sheets effectively improved the clarity of low-alcohol spirits.
Among the tested solutions, SCP-337 showed excellent performance for reducing turbidity under challenging low-temperature conditions, lowering turbidity from 9.69 NTU to 0.12 NTU while maintaining satisfactory filtration throughput.
The filtered product remained visually clear during subsequent low-temperature observation, indicating improved stability and enhanced product appearance.
Benefits Achieved
✓ Significant turbidity reduction
✓ Improved product clarity and brightness
✓ Enhanced low-temperature stability
✓ Efficient filtration performance
✓ Suitable for beverage clarification applications
Post time: Jun-17-2026
