How is NEWater obtained?<br />Jeremy Lee (16)<br />1O1<br />
What is NEWater?	<br />Reclaimed and purified wastewater	 produced by the Public Utilities Board.<br />Took 30 years to dr...
So How Is NEWater Obtained?<br />Wastewater is collected and then “cleansed” using the following methods:<br />Wastewater ...
Separation Techniques Used<br />The main type of separation technique used in NEWater plants is filtration.<br />Of the 4 ...
Process of Purification(Treatment Process)<br />Wastewater treatment<br />NEWater<br />Ultra-violet Disinfection<br />Micr...
Wastewater Treatment<br />Sand filters<br /><ul><li>Raw water collected is first filtered using sand filters to trap the s...
Clear water then runs through the setup.</li></li></ul><li>Microfiltration<br />A filtration process which removes colloid...
Function of Microfiltration units<br />In this case, microfiltration units in the NEWater plant removes the suspended soli...
Process of Microfiltration<br />Secondary treated effluents are passed through semi-permeable membranes which only allow c...
Microfiltration<br />Medium concentration of micro-organims and waste particles<br />Secondary treated effluent<br />Semi-...
Another type of Microfiltration<br />Suspended solid particles<br />Reverse Osmosis Units<br />Water Flow<br />Hollow fibr...
Another type of Microfiltration<br />Treated used water is passed through hollow fibre tubes which do not allow suspended ...
Reverse Osmosis<br />Another type of filtration which separates salt particles and other waste particles from fresh water....
Process of Reverse Osmosis<br />Water which has passed through the microfiltration units will now pass through the reverse...
Reverse Osmosis<br />Filtered water<br />Very low concentration of micro-organisms.<br />Polluted water (After microfiltra...
Reverse Osmosis<br />The semi-permeable membrane only allows water particles to pass through.<br />It traps bacteria, susp...
Ultra-Violet (UV) Disinfection<br />Highly effective method used to disinfect water.<br />A sterilisation method used to b...
Ultra-Violet (UV) Disinfection<br />Not a type of separation technique.<br />Used only to disinfect water so that water is...
Bibliography<br />The NEWatertreatement process. (n.d.). Retrieved from http://www.pub.gov.sg/water/newater/newatertech/Pu...
		Thank 			You!<br />
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Science ACE--NEWater

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Science ACE--NEWater

  1. 1. How is NEWater obtained?<br />Jeremy Lee (16)<br />1O1<br />
  2. 2. What is NEWater? <br />Reclaimed and purified wastewater produced by the Public Utilities Board.<br />Took 30 years to draw up plan.<br />Predecessor plan first draw up in 1972.<br />First NEWater Plant was completed in May 2000.<br />
  3. 3. So How Is NEWater Obtained?<br />Wastewater is collected and then “cleansed” using the following methods:<br />Wastewater treatment<br />Microfiltration<br />Reverse Osmosis<br />Ultra-Violet (UV) Disinfection<br />Water collected after going through the above methods is called NEWater.<br />
  4. 4. Separation Techniques Used<br />The main type of separation technique used in NEWater plants is filtration.<br />Of the 4 “cleansing” methods metioned previously, only Ultra-Violet (UV) Disinfection is not a type of separation technique.<br />
  5. 5. Process of Purification(Treatment Process)<br />Wastewater treatment<br />NEWater<br />Ultra-violet Disinfection<br />Microfiltration<br />Reverse Osmosis<br />
  6. 6. Wastewater Treatment<br />Sand filters<br /><ul><li>Raw water collected is first filtered using sand filters to trap the suspended solid particles in the sand.
  7. 7. Clear water then runs through the setup.</li></li></ul><li>Microfiltration<br />A filtration process which removes colloidal and suspended particles in a fluid.<br />
  8. 8. Function of Microfiltration units<br />In this case, microfiltration units in the NEWater plant removes the suspended solids, bacteria, protozoa and colloidal particles.<br />The treated used water is passed through hollow tubes or a semi-permeable membrane.<br />
  9. 9. Process of Microfiltration<br />Secondary treated effluents are passed through semi-permeable membranes which only allow certain particles to pass through.<br />Most micro-organisms and waste particles cannot pass through this membrane. <br />
  10. 10. Microfiltration<br />Medium concentration of micro-organims and waste particles<br />Secondary treated effluent<br />Semi-permeable membrane<br />Filtered water<br />Low concentration of micro-organisms and waste particles <br />
  11. 11. Another type of Microfiltration<br />Suspended solid particles<br />Reverse Osmosis Units<br />Water Flow<br />Hollow fibre tubes<br />Filtered water<br />
  12. 12. Another type of Microfiltration<br />Treated used water is passed through hollow fibre tubes which do not allow suspended solid particles to pass through.<br />
  13. 13. Reverse Osmosis<br />Another type of filtration which separates salt particles and other waste particles from fresh water.<br />In the NEWater plant, the Reverse Osmosis units remove viruses, fine colloidal particles, dissolved organics and dissolved salts.<br />
  14. 14. Process of Reverse Osmosis<br />Water which has passed through the microfiltration units will now pass through the reverse osmosis units.<br />The solutes and suspended particles are removed from the water and only pure water can pass through the semi-permeable membrane.<br />
  15. 15. Reverse Osmosis<br />Filtered water<br />Very low concentration of micro-organisms.<br />Polluted water (After microfiltration)<br />Semi-permeable membrane<br />Low concentration of micro-organisms and waste particles<br />
  16. 16. Reverse Osmosis<br />The semi-permeable membrane only allows water particles to pass through.<br />It traps bacteria, suspended solids and protozoa and colloidal particles.<br />
  17. 17. Ultra-Violet (UV) Disinfection<br />Highly effective method used to disinfect water.<br />A sterilisation method used to break down micro-organisms in the water.<br />
  18. 18. Ultra-Violet (UV) Disinfection<br />Not a type of separation technique.<br />Used only to disinfect water so that water is potable.<br />
  19. 19. Bibliography<br />The NEWatertreatement process. (n.d.). Retrieved from http://www.pub.gov.sg/water/newater/newatertech/PublishingImages/newater_process.swf<br />Sand Filter. (n.d.). Retrieved from http://en.wikipedia.org/wiki/Sand_filter<br />Water Treatment Plant. (n.d.). Retrieved from http://www.thewatertreatmentplant.com/microfiltration-system.html<br />PUB LP Newsletter. (n.d.). Retrieved from http://www.pub.gov.sg/general/Documents/2002Q3.pdf<br />MIcrofIltratIon. (n.d.). Retrieved from http://en.wikipedia.org/wiki/Microfiltration<br />
  20. 20. Thank You!<br />

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