Devika

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Devika

  1. 1. by K.Devika
  2. 2.  Contents:  Introduction  Methods of water purification  Industrial purification  Purification of sewage water/waste water
  3. 3.  Importance of water  Sources of water  Necessity of water purification
  4. 4.  Specific methods are involved in treatment of water that are categorized below  Sedimentation/screen pre filtration  clarification
  5. 5.  Involves filtration  Pressure type filters are used to sedimentate the particles different type of filters are used to separate different type of substances
  6. 6. TYPE OF FILTER ITS USAGE  sand filters  Neutralizing filters  Oxidizing filters  Activated carbons  Cartridge filters  Removes turbidity  Neutralizes low pH  Oxidizes & precipitate Fe,Mn,HS.  Reduces halogens & remove salts  Filters micro fibers like poly propylene
  7. 7. TYPE OF TREATMENT ITS USE  Water softening  Organic scavenging  Distillation  Electro dialysis  Reverse osmosis  Nano filtration  Micro filtration  Ion exchange systems  Removes Ca,Mg,Fe with softeners  Traps bases that are regenerated with NaCl  Removes both organic &inorganic contaminants  Reduces ionic content of water  Rejects the virus & bacteria like pyrogens  Removes organic compounds of 300-1000 M.Wt  Removes protozoa & virus  Removes ionic contents
  8. 8.  Treatment of sludge water involves two steps 1.Pre treatment 2.Industrial treatment
  9. 9.  The water obtained from secondary pre treatment is purified industrially as said above for usage.
  10. 10.  Even the water is purified there is a chance to present some of the viruses to destroy such viruses primitive methods like boiling has to be done before consuming.
  11. 11. yours sincerely, K.Devika (M.Sc organic chemistry)
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