Water Filtration Media
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Water Filtration Media
Absorb manufactures and provides a variety of quality graded sands and gravel for water filtration applications nationally.
Absorb Water Filter Media helps you achieve crystal clear drinking water. Our products have been used successfully in water treatment plants, tertiary sewerage filtration, industrial water treatment and swimming pools.
Absorb Filtration Media is produced in accordance with the American Water Works Association (AWWA) B100-16 Granular Filter Media Standard. We provide a complete range of granular filtration media. Additionally, Absorb can produce filtration media to an agreed specification as supplied by you.
When you purchase your filter media requirements from Absorb you can be sure that uniformity co-efficients for the filtering material are fully tested, certified, and approved prior to delivery. Additionally, you can reduce project risk by ordering material from a single source.
Quick links to more information... Filter Sands - Silicon Sponge - PCDM - Filter Gravels - Pro-OX
Read more about Filter Sand
Filter Sand
Our filter sand is sourced from multiple locations, including the sand buried for millions of years after the flow from Ruapehu travelled down the mighty Waikato and was deposited.
We ensure consistency in our product, by providing the ideal angularity, size, sphericity, and hardness for the most efficient filtering of water.
Absorb Filter Sands have a slow breakdown rate ensuring a longer filtration life. Further, our sands feature excellent backwashing characteristics, particularly when used in dual media filtration with Silicon Sponge or filter coal.
Our silica sands are clean, hard, sub-rounded and consist of durable particles in accordance with the requirements for the AWWA B100-16. Absorb Filter Sands are typically manufactured from a river sand highest grade and carefully graded to meet a variety of gradings.
Due to the size, hardness and sphericity of the silicon sand particle sizes along with our proven manufacturing process, our filter sand has tighter tolerances making it more efficient in filtering water. Our filter sand also improves filtering efficiency by reducing retention time and head pressure loss with greater flow rates.
Grades of Absorb Filter Sand.
FSO Filter Sand.
3 - 4 mm in size.
Sold in 1 Tonne bulk, 20 kg bags, or to customer requirements.
FS1 Filter Sand.
1.2 - 2.4 mm in size.
Previously known as 7/14.
Sold in 1 Tonne bulk, 20 kg bags, or to customer requirements.
FS2 Filter Sand.
0.6 - 1.2 mm in size.
Previously known as 14/25.
Sold in 1 Tonne bulk, 20 kg bags, or to customer requirements.
FS3 Filter Sand.
0.3 - 0.6 mm in size.
Also known as PCDM.
Sold in 1 Tonne bulk, 20 kg bags, or to customer requirements.
Read more about Silicone Sponge
Silicone Sponge
Silicon Sponge is an effective media for filtration. It provides benefits as an upper layer over sand in conventional plants and in PCDM installations and in particular:
- it leads to longer filter run times.
- it provides lower turbidity values.
- it reduces floc carryover for both aluminium and iron flocculants.
- it is capable of shorter washing regimes resulting in lower washing times and water requirements.
A silicon sponge sand combination performs better than multimedia filters, anthracite/sand beds and conventional rapid sand filters. It is also suited to direct filtration applications.
Absorb silicone sponge is an alternative product to anthracite.
Grades of Absorb Silicone Sponge.
SS1 Silicone Sponge.
1.2 - 2.4 mm in size.
Previously known as 7/14.
Sold in 1 Tonne bulk, 20 kg bags, or to customer requirements.
SS2 Silicone Sponge.
1.2 - 2.4 mm in size.
Previously known as 14/25.
Sold in 1 Tonne bulk, 20 kg bags, or to customer requirements.
Read more about PCDM
PCDM - Porous Ceramic Dual Media
Developed as a replacement media for conventional sand filters, PCDM has attracted strong attention and a loyal customer base for the benefits it offers water users, which include lower operating and capital costs, better performance characteristics, and the ability to fit inside existing water treatment plants to increase flow rates and lengthen run times.
The sand used in traditional filters is usually 0.6 to 1.2 millimetres in diameter, whereas PCDM sand is very evenly graded between 0.3 and 0.6 millimetres. An example of how this works is the virtually complete removal of aluminium from water that has been flocced with alum. Other metals, for example iron and manganese, both common in New Zealand bore supplies, can be captured if they are oxidized into an insoluble state. Results from PCDM systems verify the filters' ability to handle floc carry over. In one case, the level of aluminium carry over was reduced by more than an order of magnitude. It is also noteworthy that the background aluminium residuals are much lower than the traditional system.
Read more about Filter Gravel
Filter Gravel
Filter gravel is used as a support media to filter sand and coal in water filters. For maximum efficiency, filter gravel must possess the necessary attributes of hardness and be rounded rather than angular. Like the Absorb filter sand, our gravels contain hard durable particles with a slow breakdown rate to help prolong the life of the filter.
Our filter gravels are clean, hard, sub-rounded particles made from silica and quartz, meeting the stringent requirements for the AWWA B1OO-16. Our filter gravels are manufactured from the highest-grade stone (SiO2>75% and AL2O3>12.37%).
Grades of Absorb Filter Gravel.
PM0 Drainage Rock.
> 20 mm in size.
Sold in 20 kg bags, or to customer requirements.
PM1 Drainage Rock.
10 - 20 mm in size.
Sold in 1 Tonne bulk, 20 kg bags, or to customer requirements.
PM2 Pea Metal.
5 - 10 mm in size.
Sold in 20 kg bags, or to customer requirements.
PM3 Pea Metal.
3 - 5 mm in size.
Sold in 1 Tonne bulk, 20 kg bags, or to customer requirements.
Read more about Pro-OX
Pro-OX.
Imported for the removal of manganese, iron, hydrogen sulphide, arsenic and radium from water sources, it acts as a catalyst to promote oxidation of iron and manganese in solution creating a precipitate.
Absorb Pro-OX is used alone or in combination in dual media filtration systems. It ensures effective reduction of hydrogen sulphide and iron reduction over a wide pH range. Additionally, its tolerance to higher differential pressure can provide longer run times between backwashes and a greater margin of safety. There is also no requirement for extensive preconditioning of the filter media or lengthy start-up periods; and there are no changes required for backwash rates or times or chemical feeds.
Additional Information about all Absorb Water Filtration Media's.
Applications.
Bag Size.
20kg bags.
1 Tonne bulk bags.
Custom requirements.
