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Flocculation

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Created on 07 August 2013
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Flocculation is an essential part of drinking water treatment as well as watewater treatment. Sometimes in the water you can find floating particles inorganic (like clay) and organic (like algae or bacteria) and they can cause diseases (like cholera, hepatitis A or salmonella). The primary purpose of the coagulation/flocculation process is the removal of turbidity from the water.  Turbidity is a cloudy appearance of water caused by these small particles suspended therein.  With Flocculation, the colloids aggregate come together to form larger particles (flocks) by the addition of a chemical called a flocculant (alum and ferrix). These flocks are now heavy enough to settle to the bottom by gravity.

Singapore, as many countries around the world, uses this method to clean its water supplies. As the global population increases and freshwater resources become more and more scarce, flocculation is one tool that can supply clean, healthy and tasty drinking water worldwide.

More info: www.khanacademy.org
Produced by: MITK12Videos
Year: 2012
Language: English
Region: Global

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