JAMES CUMMING & SONS

Support Filter Media
Silica and Garnet Gravels & Sands

Product description

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.

Garnet Gravel

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)

 

Mineral Composition

Garnet – minimum 90%
Feldspar & Quartz – minimum 2%
Biotite & others – maximum 0.25%

Packaging process

Packaging

  • Our support filter media is typically packaged in woven polypropylene bulk bags of 1,000kgs.
  • Or in small sacks, each sack weighs 25kg, with 40 sacks per pallet.

Projects

Sydney Desalination
Plant

In response to declining water levels, Sydney Water obtained approval for a Seawater Desalination Plant. Pilot testing favoured coarse dual-media filtration. We supplied C & S Brand Australian filter coal, on time and to exact specification.

Qurayyat Desalination
Plant

This plant is in operation to address water shortages in Muscat, Oman and surrounds. We supplied 2,210 cubic metres of C & S Brand Australian filter coal, delivered on time, to exact specifications.

Dungog WTP

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 filter coal and remains an industry frontrunner with long-term results, durability and stability.

 

Barangaroo Lendlease
Grand Casino

We supplied premium C&S Brand Australian activated carbon while transforming a former gas works into a modern casino and hotel, effectively eliminating odours and volatile organic compounds (VOCs), and adding to the evolving skyline.

Mt Crosby
Eastbank

This refurbishment project included converting 20 mono-media sand filters to dual-media filters with C&S Brand Australian filter coal. It extended filter run times, reduced backwashing frequency and improved plant performance, surpassing client expectations.

Contact us

for your Filter Coal, Activated Carbon and Carbon additive needs

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