This is a method for water purification using sand bed filters. This
Inverted Flow filter isapplicable 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 resorces are found in nearby locality. Water filter from other resorces
and avilable as consumable water in nature due to the similar phenomina
occured under ground in this manner. In the above figure you can see the
recepter 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