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Customer Requirements
The customer aimed to achieve the following objectives through filtration testing of the osmanthus supercritical cell extract:
- Select suitable filter sheets to improve sample clarity;
- Recover oil components present in the sample during the filtration process.
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Experimental Plan
Main Equipment:
- Small single-plate filter × 1 unit
- Filter sheets: BIO-PH20 (pore size: 0.5–0.8 μm)
- Turbidity meter
Procedure:
- Clean the equipment 5% NaOH and 5% HCl solutions, followed by rinsing with purified water until pH reaches 7–7.5.
- Install BIO-PH20 filter sheets and flush with purified water at 50 L/m² to remove surface fibers and dust.
- Feed the osmanthus supercritical cell extract into the filter, collect the filtrate, and measure turbidity.
- Record filtration volume, recovery rate, and turbidity before and after filtration.
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Experimental Results
| Sample Name | Filter Sheet Model | Turbidity Before | Turbidity After | Recovery Rate (%) | Filtration Flux (L/min/m²) |
| Osmanthus supercritical extract | BIO-PH20 | / | 20.5 | 95 | / |
Note: Filtration flux data was not fully recorded. The actual value can be estimated based on the equipment filtration area (0.0012 m²).
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Result Analysis
- Oil Recovery: No visible oil accumulation was observed on the backside of the filter sheet. Only a small amount of oil adhered to the surface, indicating a relatively low oil content in the raw extract.
- Clarity Improvement: After filtration with BIO-PH20 filter sheets, the turbidity significantly decreased, and the filtrate became clear. The clarity improvement met the customer’s expectations.
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Conclusion
BIO-PH20 filter sheets (pore size 0.5–0.8 μm) are suitable for the clarification of osmanthus supercritical cell extract. They effectively improve clarity while maintaining a high recovery rate (95%) and allowing limited oil recovery.
It is recommended that the customer continue using this model of filter sheets for large-scale production.
Post time: Apr-14-2026
