Pumice
Pumice is a natural volcanic filtration medium characterised by its porous structure, low density and high specific surface area. It is used in desalination and drinking water treatment processes.
What is pumice used for in water treatment?
Pumice is particularly suitable for desalination and drinking water treatment plants. Its low specific gravity, high porosity and filtration properties make it a suitable alternative for desalination and SWRO applications. Its hydraulic characteristics make it well suited to filtering water with a high concentration of suspended solids, helping reduce SDI and turbidity.
Answers to your questions about pumice
What is pumice used for as a filtration medium?
It is used to filter water with a high concentration of suspended solids, helping reduce SDI and turbidity. Applications include desalination and SWRO, wastewater, industrial water and drinking water treatment.
How does it differ from anthracite?
It has a lower specific gravity and higher porosity, which can support higher hydraulic loading rates. It can be used as an alternative to anthracite in the same filter-bed position.
Does it reduce SDI before reverse osmosis?
Yes. Its ability to reduce SDI and turbidity is one of its advantages and is why it is used in SWRO pretreatment.
Which standard does it comply with?
UNE-EN 12906:2013 for the treatment of water intended for human consumption.
Does it offer environmental advantages over other media?
Its open-pit extraction gives it a very low carbon footprint compared with other filtration media.
Which packaging format is available?
It is supplied in 1 m³ big bags.
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