This is part of the educational series that http://schools.indiawaterportal.org has introduced. This presentation is aimed at allowing the teaching and parent community to explain the existing and potential problems of water mismanagement in our world. This is part of the creative common license

1. Municipal Water and Wastewater treatment

2. Magic!!!

3. Magic!!!

4. Magic? Not really

5. I come from a RIVER in your state

6. Magic? I come from a LAKE or a RESERVOIR close to your city

7. I come from deep UNDER THE GROUND . In the river bed and other places, there are borewells through which I come out during the summer months

8. I come from the SEA …. but what follows is not my story, because I go through a different path before I reach you.

9. A big pipe sucked us in

10. Along the way, there was a mesh We could go through but 3 friends of ours (pebble, stick and leaf) couldn’t make it.

11. A pipe sucked us in Along the way, there was a mesh. We could go through but 3 friends of ours (pebble, stick and leaf) couldn’t make it. A pump pushed us a long distance until we reached this big factory like place called ‘Water treatment plant ’ There were boards all around which said ‘ Restricted Area’. I wonder why . Do you know?

12. Flocculation From a dark gloomy pipe where we were really rushed, we reached a BIG tank. When we were resting, something called Aluminium Sulphate (let’s call him ALUM ) and some of his friends joined us.

13. Flocculation Alum and his friends are very sticky and my pals ‘Dirt’ from the river, who managed to pass the mesh earlier on, got really attracted to them.

14. Flocculation Alum and friends, along with ‘Dirt’ stuck together. We called them ‘ FLOC ’

15. Flocculation Alum and friends, along with ‘Dirt’ stuck together. We called them ‘ FLOC ’

16. Flocculation We were then stirred and churned around and the ‘ FLOC ’ started getting bigger with more dirt sticking around. We also saw many more ‘flocs’ forming

20. We then travelled a large distance Photo by C C Krause; Source: http://www.flickr.com/photos/charleskrause/3185090628/ through pipes

21. to large tanks within your city Photo by John Brian Silverio; Source: http://www.flickr.com/photos/psilver/2280385292

22. And from there to overhead tanks near your school Photo by BockBilbo; source: http://www.flickr.com/photos/bockbilbo/247405160/

23. We got to your school this morning and here we come…….. Out of your tap

25. This is what we look like when we reach the wastewater treatment plant We’re full of poop, soap, oil, grease, soil, garbage, chemicals….all kinds of stuff Photo by flippy rice; Source: http://www.flickr.com/photos/flippy/110659044/

29. A recap – water treatment Primary Filters (to remove large matter) Flocculation tank Sedimentation tank Rapid / slow sand filtration Chlorination Water from rivers / lakes To tanks in the city

30. A recap – waste water treatment Grit Filters (to remove large matter) Sedimentation tank Trickling filter Aeration Secondary filters Wastewater from city To stream Tertiary treatment