Water filter (Free
technology for all ) for water purification
Patents were granted in Sri Lanka ( Inventor
- Leelananda Jayasuriya)
Inverted Flow filter for
water treatment & waste water treatment
Basically Inverted flow filter is a sand
filter. The structure is an open type water tight rectangular tank divided in to two
compartments connected by a duct from bottom. When raw water is fed to the inlet tank
water percolate through the filter media that comprises of fine sand and passes along the
duct to the underside to the sand bed of other compartment. This structure behaves similar
to "U" tube, filled water in it. Due to force trying to equalize the
levels on both compartments this water passes over to the surface of the filter bed of the
left side compartment as shown.
To perform this action only a little pressure head is required.
It does not require the expensive construction of a suspended sand bed. This is
better in performance compared to gravity
sand filters.of "u" type filter bed .
This observable fact is demonstrated in
nature where palatable water is available for consumption. 
Inverted flow filter is applicable in sewerage filtration as
well. In sewerage filters the filter media consists relatively larger size filter material
instead of fine sand.
We offer you free technology and know how.
Please contact for more details : Leelananda Jayasuriya
Contact E-mail : leel6391@yahoo.com
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