This is a method for water purification using sand bed filters. This
Inverted Flow filter is applicable for water treatment & waste water
treatment.
The structure is an open type water tight rectangular tank divided
in to two compartments connected by a passage 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 passage provided at 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.
In nature we find pure water in springs and in deep wells while
polluted water resources are found in nearby locality. Water filter
from other resorces and available as consumable water in nature
due to the similar phenomena occurred under ground in this manner.
In the above figure you can see the receptor compartment consist
of flow diversifying structure to spread the flow on a wider area.
If this type of structure is not constructed the upword flow will
take part at the closest position to right hand side compartment.
To perform this action only a little pressure head is required.
It does not require the expensive construction of a suspended sand
bed.
Waste water Filtration
Inverted flow type sand filters treat wastewater using physical, biological,
and chemical processes. This is ideal where economy and freedom from
regular maintainace are concerned for homes, businesses, institutions,
and small residential communities. Also it is the best option where
septic tanks and mechanical options fails due to high ground water.
Such sand filters usually are used as the second step in wastewater
treatment after solids in raw wastewater have been separated out in
a septic tank, aerobic unit, or other sedimentation process. Wastewater
treated by sand filtration is usually colorless and odorless.
When discharged to soil, sand filter effluent receives further treatment
in a soil absorption field.
In sewerage filters the filter media consists relatively larger size
filter material instead of fine sand. We offer you free technology and
know how.