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modified form of drawer compacted sand filter

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it is the modification of drawer compacted sand filter with the replacement of 4th and 5th layers by silver coated sand and coconut shell activated charcoal.

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modified form of drawer compacted sand filter

  1. 1. 1 MODIFIED DRAWER COMPACTED SAND FILTER ABIJITH G CIJI B HARIPRIYA M JIVIC J PANACKAL SIJITHA SIDHAN
  2. 2. 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 agriculture. Grey water
  3. 3. now ?.Why reuse Grey Water  Treated GW will act as a substitute to those applications which do not require drinking water quality.  As the treated grey water is high in nutrients (i.e. N2, P) we can use it for irrigation purpose.  GW recycling will reduce the load on the sewage treatment plant. Advantages  Save water (30-35% reduction in consumption) and money Reduction in generation of waste water will reduce potential of environmental pollution Reduction in surface and ground water pollution Sustainable Development
  4. 4. DCSF Filter medium Drawer 1 Gravels; effective size 4.75 mm Drawer 2 Silica; effective size 1.18 mm Drawer 3 Silica; effective size 600micron Drawer 4 Silica; effective size 75micron Drawer 5 Silica; effective size 1.18mm and 600micron Drawer 6 Granular activated carbon Depth of media 10cm (for each drawer) Perforation – for each drawer – except the lowest one Orifice size=4mm Orifice spacing=10cm Number of orifices =15
  5. 5. 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
  6. 6.  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
  7. 7. MDCSF Replacement of : 4th layer by silver coated sand 5th layer by coconut shell activated charcoal
  8. 8. 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
  9. 9. 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 development. Conclusion
  10. 10. THANK YOU

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