What is EGFM?

Eco Glass Filter Media (EGFM) is the new environmentally friendly and cost effective filter media that provides a viable alternative to sand. Made from recycled glass, it doesn't involve intrusive mining and the use of scarce resources.

Advantages of EGFM

EGFM has the green credentials, and with its superior performance is also cost effective against sand.

EGFM is more efficient

Saving on backwashing and the resultant water, energy and chemical treatment costs.

• Its angular to sub-angular particle shape and bound silica content provides a 30% improvement in turbidity removal over silica sand.
• It generally removes finer particles from water than the equivalent grade of silica sand.
• Its non porous composition means it is less likely to 'clump' or channel than silica sand.
• With superior permeability, back washes take less time, saving water/sewer charges, and energy and chemical treatment costs.

EGFM is cleaner

It is less susceptible to bio-fouling as, unlike silica sand EGFM particles have a smoother surface, so bacteria cannot get trapped in any cracks or flaws, which means less remedial action and again less chemical treatment to destroy pollutants.

Microscopic image of silica sand Microscopic image of EGFM

 
EGFM requires less material

It is less dense than sand, requiring 15% less media to fill the equivalent filter.

Dia of filter (cm)	Volume if filter bed is 1 mtr (m³)	Total Grade 1 & 3 Sand Required (Tons)	Total Grade 1 & 3 EGFM Required (Tons)
61	0.29	0.15	0.13
160	2.01	3.0	2.6
180	2.54	3.5	3.0
200	3.14	5.0	4.4
250	4.90	8.2	7.2
300	7.07	11.9	10.3

 

EGFM doesn't degrade

It therefore has a longer life span and may not need changing even when the filters are due for refurbishment.

Grades

EGFM is available in three grades of media. All grades are milled down and are sharp free.

Grade 1 (0.5mm - 1.0mm (16/30))

Grade 1 is the filtration media.

Grade 2 (1.0mm - 3.0mm (16/30))

Grade 3 (3.0mm - 7.0mm (pea gravel))

Grades 2 and 3 act as support media.

Production Process

Waste container glass accepted from unwanted re-melt industry and local household collections.

Waste glass processed using Masterliness Implosion™ technology.

 

Sharp free and un-graded basic glass cullet is initially produced.

Further processing is carried out to produce a sharp free, clean, dry and graded environmentally friendly product with excellent properties in water filtration.