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3.4 Filtration Anthracite (Filtracite®)
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Filtracite® is manufactured from highly durable anthracite, which following extraction by mining is screened, washed and processed to produce a comprehensive range of water filtration products.
The physical and chemical inert nature of Filtracite® makes it suitable for all potable, municipal and industrial processes where the removal of finely divided particulate material from aqueous suspension is required.
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Potable Water - Filtracite® is used in combination with sand in rapid gravity filters for the treatment of both raw and coagulated, settled water. The benefits in this application are;
- Longer filter runs
- Increased filtration rate
- Improved filtration quality
- Lower residual aluminium levels
- Reduced backwash water and power consumption
Municipal Sewage Treatment - The tertiary treatment of sewage effluent to remove solids is necessary to meet discharge consents. Filtracite®, used in isolation or as a dual media allows the use of higher filtration rates and reduced operating costs. Filtracite® also exhibits a greater capacity for solids allowing extended operation between backwash intervals.
Industrial Water Purification - Effective removal of particulate matter from process streams in the chemical, petrochemical, textile,paper and pharmaceutical industries is achieved by the use of Filtracite® in conjunction with other filtration medium such as sand and garnet. For process supply water, Filtracite® provides an effective particulate removal medium in conjunction with other filtration medium or as support material for mechanical or adsorption filters.
CPL Carbon Link manufactures a range of Filtracite® for water treatment.
The key features of these product are;
- Low bulk density
- Irregular shaped particles create a high void volume, high surface area and tortuous flow path
- High solids loading
- High permeability
- UK Drinking Water Inspectorate (DWI) approved
| Bulk density (kg m³) 740 Solubility (%w/w)* 1.5
Hardness (Moh scale) 3 Attrition loss (%)** 0.4 |
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| Grade (mm) | Size (mm) | Effective Size (mm) | Uniformity Coefficient |
| 1 | 0.6 - 1.2 | 0.7 | <1.5 |
| 1s | 0.8 - 1.4 | 0.9 | <1.5 |
| 2 | 1.2 - 2.5 | 1.2 | <1.5 |
| 2s | 1.4 - 2.5 | 1.6 | <1.4 |
| 3 | 2.5 - 4.0 | 2.6 | <1.5 |
| 4 | 5.0 - 10.0 | Nominal within 85% of size range | |
| 5 | 20.0 - 40.0 | Nominal within 85% of size range | |
| 6 | 40.0 - 80.0 | Nominal within 85% of size range | |
| 7 | 0.6 - 1.2 | Nominal within 85% of size range | |
| * in 10% HCl at 20°C and 10% NaOH at 20°C
** after 100hrs backwash |
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