MODIFIED DRAWER COMPACTED
JIVIC J PANACKAL
Grey water is defined as the waste water that is
obtained from showers, kitchen, laundry etc.
excluding black water (toilet water).
It is a sustainable water resource that can
significantly reduce the usage of fresh water for
?.Why reuse Grey Water
Treated GW will act as a
substitute to those
applications which do not
require drinking water
As the treated grey water is
high in nutrients (i.e. N2, P)
we can use it for irrigation
GW recycling will reduce
the load on the sewage
Save water (30-35%
reduction in consumption)
Reduction in generation of
waste water will reduce
potential of environmental
Reduction in surface and
ground water pollution
Drawer 1 Gravels; eﬀective size
Drawer 2 Silica; eﬀective size 1.18
Drawer 3 Silica; eﬀective size
Drawer 4 Silica; eﬀective size
Drawer 5 Silica; eﬀective size
Drawer 6 Granular activated
Depth of media 10cm (for each drawer)
Perforation – for each
except the lowest one
Number of oriﬁces =15
Advantages of DCSF
Aerobic treatment in all layers.
Clogging is no longer serious problem.
Excavation works are no longer required.
The DCSF only requires 1m2 of land area.
This maintenance procedure is very convenient comparing
to the intermittent sand filter
It cannot remove all type of microorganism
Rate of filtration is less
Filtered water can not be stored for more than 24 hr
Disadvantages of DCSF
Replacement of :
4th layer by silver coated sand
5th layer by coconut shell activated charcoal
Advantages of MDCF
Disinfection with silver,
Reduces bacteria, protozoa and industrial parasites
it doesn't produce any taste or odour in the treated water
No by – products are formed as a result of its use
Increases the % removal than DCSF
For the purpose of landscaping, gardening, irrigations, plant
growths and toilet flushing.
The benefits found are low energy demand, less operating and
maintenance cost, lower load on fresh water, less strain on septic
tank, highly effective purification, and ground water recharge.
So, this is an environmental friendly, without chemical
operation ,cost effective and resourceful plant for rural