Walnut shell filter material
Key Features
- Durability and Efficiency: With a hardness of 3 on the Mohs scale and low attrition, it withstands high-pressure environments and lasts longer than alternatives like sand.
- Natural Properties: Non-toxic, biodegradable, and chemically stable, ensuring safe use across industries.
- Performance: Achieves high flow rates (10-16 gpm/ft²) with minimal pressure drop, supporting efficient operations.
Applications
Primarily used in oil and gas for produced water treatment, industrial wastewater filtration, groundwater remediation, and food processing. It helps meet discharge requirements by reducing contaminants to low levels, such as under 5 ppm for oil and solids in some systems.
Advantages
Offers cost-effective filtration with reduced backwash water needs (1X volume vs. 5-7X for other media) and no frequent replacements. Its natural origin supports sustainability goals, and it provides balanced performance for both oil affinity and solids capture, making it versatile for global B2B markets.
| Category | Parameter | Typical Value/Range | Notes/Source |
|---|---|---|---|
| Physical Properties | Specific Gravity | 1.2-1.4 | Non-dimensional; ensures settling in beds. |
| Bulk Density | 0.73-0.85 g/cm³ (729-850 kg/m³) | Affects filter bed design and loading. | |
| Hardness (Mohs Scale) | 3 | Provides wear resistance. | |
| Moisture Content | <11% by weight | Ensures stability and prevents microbial growth. | |
| pH | 7.5 | Neutral, non-corrosive. | |
| Attrition Rate | 2% per year | Low loss extends service life. | |
| Grain Shape | Angular, multi-faceted | Enhances filtration surface area. | |
| Chemical Composition | Cellulose | 40-60% | Primary structural component. |
| Lignin | 30-40% | Contributes to durability. | |
| Nitrogen | 0.1% | Low, indicating minimal organic leachables. | |
| Fat | 0.2% | Minimal oil content. | |
| Ash | 0.5-2% | Low impurity level. | |
| Sulfur | 0.08% | Very low, environmentally safe. | |
| Carbon | 36-38% | Supports adsorption properties. | |
| Particle Size Distribution | Common Mesh Sizes | 8-12 (1.7-2.36 mm), 12-20 (0.85-1.7 mm), 20-40 (0.42-0.85 mm) | Customizable; finer for polishing, coarser for high flow. |
| D50 (Median Size) | 1200-1300 microns | Uniform distribution for consistent performance. | |
| Fines (<20 mesh) | <2-3% | Minimizes clogging. | |
| Performance Characteristics | Oil Removal Efficiency | 90-99% | For insoluble hydrocarbons. |
| Suspended Solids Removal | 95-99% | Down to 2-5 microns. | |
| Flux Rate | 10-16 gpm/ft² | Higher than sand alternatives. | |
| Inlet Limits | Oil <50-100 ppm, Solids <25-50 ppm | To maintain efficiency. | |
| Outlet Quality | <5 ppm oil/solids | Suitable for reinjection or discharge. |
Customer Reviews
We switched to YONGRUIDA for the activated carbon in our municipal water treatment facility, and the consistency has been remarkable. Their product reliably meets specifications batch after batch, which is critical for our compliance. The Certificate of Analysis with every shipment gives us complete peace of mind.
The technical support from the YONGRUIDA team was invaluable. They analyzed our wastewater stream and recommended a specific grade of GAC that increased our contaminant removal efficiency by over 20%. They are more than a supplier; they are a genuine partner in solving our operational challenges.