Optimise the performance of multimedia or dual media filtration systems with garnet filtration media. This media provides durability and consistent performance in settings like municipal water treatment facilities, industrial wastewater management and desalination plants. Its higher bulk density maximises space within the filter, which allows for additional filtration layers that improve plant throughput and overall efficiency.
Finer grades of Garnet filtration media can also provide effective physical filtration, similar to Filter Coal, which is used for sediment capture and pre-filtration. It is also used as a support media underneath activated carbon, which excels at adsorption of organic contaminants.
Maintain the functionality of filtration systems with garnet filtration media. For a quote or to request a data sheet, reach out to our team or explore our product information today.
Our Garnet Gravel Filter Media, is characterised by deep-brownish red angular granules, is composed of natural almandite garnet. The unique minerology of Garnet gives it the appropriate physical characteristics that make it an ideal support filter media in multi-media or dual media filtration systems.
Relied upon for its chemical inertness and absence of toxic metals, it has an ideal specific gravity and bulk density, low acid solubility and consistent particle sizing for use in support media. The advantage of Garnet Gravel as opposed to Silica gravel is that due to it’s bulk density, it takes up less space in the filter, meaning more room for the filtration media layers above, increasing plant through put when compared to Silica Gravels with a lower bulk density. Increasing the filter media above the support layers, ensures you’re giving the depth of media the greatest contact time or void space possible, depending on the media configuration above and the quality of the raw water being fed through the plant.
One of the core purposes of support filter medias are so that the filtration media layers above it, don’t escape down through the filter floor and block up the nozzles when a treatment plant is performing a backwash, so the particle sizing of the product is also of importance, as you don’t want the finer particles of the grade sitting above the floor also smaller than the aperture of the nozzles.
Garnet Gravel when utilised as a support layer for granular filter media in water treatment, guarantees consistent prolonged performance across a range of water treatment plants & processes.
Stock Particle Sizing and Ranges
0.25mm (60 mesh)
0.3-0.6mm (30 x 50 mesh)
0.6-1.2mm (16 x 30 mesh)
1.2-2.4mm (8 x 16 mesh)
2.4-4.8mm (4×8 mesh)
4.8-9.6mm (2×4 mesh)
Garnet – minimum 90%
Feldspar & Quartz – minimum 2%
Biotite & others – maximum 0.25%
This was the first contact filtration plant in Australia to use large effective size media, after pilot plant work by the Hunter Water Corporation. It was also the first to use C & S Brand Australian Filter Coal and remains an industry frontrunner with long-term results, durability and consistency.
While both garnet and silica filtration media are effective as support medias, garnet’s unique properties make it a superior choice for many water filtration applications, especially those requiring high-quality water and efficient operation. Our Garnet Gravels have smaller and denser particles than silica gravel that enables our operators to have more volume of filtration media above the layers of Garnet Gravel, improving capacity and throughput of the system.
Due to its stability and efficient filtration, garnet filtration media can extend filter run times and reduce the frequency of backwashing. Its resistance to stratification minimises water waste during backwashing, promoting water conservation.
During backwashing, water is forced upward through the filter bed, loosening and removing trapped particles. Garnet’s high density prevents it from being easily displaced during this process, so that the filter bed remains stable, and the media layers do not mix. This stability allows for efficient backwashing, where the finer media can be effectively cleaned without being lost or migrating to other layers. By maintaining the integrity of the filter bed, garnet helps to prolong the filter’s lifespan and optimise its performance.
Our Garnet Gravels can be applied in various water treatment systems, including:
Finer Garnet filtration media removes suspended solids, turbidity and contaminants, making it beneficial for drinking water treatments in municipal systems. Additionally, its durability and chemical stability help maintain water clarity and hygiene in swimming pools and aquariums.
Our Garnet Gravels can be applied in various water treatment systems, including:
Finer Garnet filtration media removes suspended solids, turbidity and contaminants, making it beneficial for drinking water treatments in municipal systems. Additionally, its durability and chemical stability help maintain water clarity and hygiene in swimming pools and aquariums.
Generally, garnet filtration media should last for indefinitely without needing replacement. Regular monitoring and inspections of your filter gallery should ensure you’re running your filtration system and optimising it’s performance.. Consult with water treatment professionals or process engineers to determine the optimal replacement schedule for your specific filtration system.
Garnet media, like our Garnet Gravels, does not affect the taste or quality of treated water. It is chemically inert, meaning it does not react with the water or the chemicals used in the filtration process. Garnet’s primary function is to physically remove impurities without altering the water’s chemical composition or taste. In fact, by improving water clarity and removing undesirable particles, garnet can contribute to a more pleasant drinking experience.
for your Filter Coal, Activated Carbon and Carbon additive needs
James Cumming & Sons
319 Parramatta Road,
Auburn NSW 2144 Australia
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