WHY SHOULD YOU USE AFM ?
AFM will remove smaller particles from the
water. Under controlled conditions.
Using 16 x 30 grade sand at a flow
rate of 10 cubm/hr/sqm sand removed approx 90% of
all particles down to 10 microns.
AFM grade 1 under the same conditions reduced
particle size down to 5 microns.
In addition to removing solids by physical
processes, AFM has a surface - vo charge
which allows it to remove very small particles and organic modules by surface
adsorption. AFM is excellent at removing + ve ions such as iron and manganese.
In addition to the surface -vo charge we
have developed surface catalytic properties
for AFM. When AFM is used to filter
water containing at least 1 mg/l of dissolved
oxygen the AFM will dissociate the
oxygen molecule to generate two free radicalsof
oxygen . The free radicals provide a degree of surface disinfection as well
as cracking organic molecules on the
surface of the AFM.
HOW TO USE AFM
AFM is very easy to use . It is a direct
replacement for sand in all pressure or gravity
flow sand filters. Simply remove the sand and replace with AFM. In all application
sand water flowrates tested. AFM out
- performed sand. However in both cases best
performance is acheived using the slowest flowrates.
The filter should be layered with either
pea gravel or grade 2 AFM as the bottom layer
the quantity of base material will
depend on filter design, however it is normally 10%
to 20% of the total bed volume. Grade
1 AFM is placed on top of the grade 2. For very
performance grade 0 may be used on
top of grade 1. If grade 0 is used approx 10% of
the total bed volume should be grade
0.
WHAT IS AFM ?
AFM is an advanced filtration
media designed to replace filter grade sand in presurre
filters and gravity flow filters. AFM is far superior to a good quality
filter sand.
Changing from sand to AFM will result
in some major improvements to thebrperformance
of your filtration system.
WATER FLOWRATES
The recommended water flowrate will depend
on the filter design, type
of water treated, and water quality required. The following can be used
as a guide to sizing a filter for
use with AFM.
BACK - FLUSHING
A back-flushing water flowrate of 25 to 50 cubm/hr is required . The optimum flowrate depends on the type of water being treated and thedegree of bed expansion required to clean the AFMAFM SPECIFICATIONS
Appearance
AFM has a similar
appearance to sand.
Standard Particle Size
Grade 0 mmmmmmmmmmmm0.25mm
to 0.5mm
Grade 1nnnnnnnnnnnnnnnnnln0.5mm
to 1.0mm
Grade 2kkkkkkkkkkkkkkkk1.0mm
to 2.0mm
