Techfil are able to supply filtration markets with both the traditional and modern medias. Included in our comprehensive range are: Pumice Filter Media, Silica Sand, Anthracite Filter Media, Garnet Filter Media, Recycled Glass and Support Gravel.
Pumice Filtration Media is a low-density media typically used in multi-media filters to enhance the capacity of the filter and to remove smaller micron particles. Pumice sits as the top layer in a multi-media filter and is widely used for pretreatment in desalination and seawater reverse osmosis plants (SWRO). For further detailed information on our Pumice Filtration Media please follow the link: Pumice Filtration Media
Silica Sand is an extremely effective filter media because of its ability to hold back coagulum or precipitates containing impurities. Filter sand size, angularity and hardness are the important filter sand characteristics to ensure proper filtering.
Anthracite Filter Media
Anthracite is commonly used as a component of multi-media filters. Anthracite is a durable media with long life and a wide temperature range. A lower uniformity coefficient has less oversized and undersized particles resulting in a highly uniformed bed.
Garnet Filter Media
Garnet is well known for its hardness and durability. It has a high specific gravity as well as its chemical and abrasive resistance makes garnet an ideal filter media. Garnet is typically used in multi-media filters as the sub-fill or bottom layers of the filter. Although its density requires high backwash rates combining fine mesh garnet with other media such as sand and anthracite significantly increases the filtration capacity of the filter.
The large pore volume and surface area of Expanded Clay make it ideal for the biological treatment of drinking water. In dual media filtration in combination with sand, expanded clay makes an excellent filter media in both potable and wastewater applications.
Recycled Crushed Glass
Recycled Glass has similar characteristics to natural sand. Glass filtration media generally removes finer particles from water than silica sand of an equivalent grade. Crushed glass filtration media is less likely to block or channel than silica sand.
Finely crushed recycled glass for pool, industrial, and environmental filtration provides outstanding water clarity and quality – a direct replacement for silica sand. The 0.50 – 1.00mm size is recommended. Cleaner, lighterweight and highly angular, crushed recycled glass provides an amazing 25% improvement in turbidity removal over silica sand.
Crushed glass filtration media generally removes finer particles from water than silica sand of an equivalent grade. The weak negative surface charge holds fine particles and positively charged iron and manganese ions that are easily released upon backwashing. Crushed glass filtration media is also less likely to block or channel than silica sand.
Support Gravel, the lower strata of a filter bed, acts to support the filter medium. The support gravel must possess the necessary attributes of hardness and be rounded or non-angular. Correct gradation and sizing must be calculated to properly support the filter media.
Further Information and Technical Support
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